[libpng16] Imported from libpng-1.6.12.tar

[libpng16] Bump version to 1.6.12rc04
[libpng16] Imported from libpng-1.6.12rc03.tar
2025-07-10 18:04:09 +02:00 · 2014-06-11 20:41:51 -05:00 · 2014-06-08 12:10:04 -05:00 · 2014-06-07 22:46:46 -05:00 · 2014-06-07 22:27:44 -05:00 · 2014-06-07 14:49:03 -05:00
85 changed files with 611 additions and 348 deletions
--- a/32
+++ b/32
@@ -1,35 +1,35 @@

-Libpng 1.6.11beta01 - March 17, 2014
+Libpng 1.6.12 - June 12, 2014

-This is not intended to be a public release.  It will be replaced
-within a few weeks by a public version or by another test version.
+This is a public release of libpng, intended for use in production codes.

 Files available for download:

 Source files with LF line endings (for Unix/Linux) and with a
 "configure" script

-   1.6.11beta01.tar.xz (LZMA-compressed, recommended)
-   1.6.11beta01.tar.gz
+   libpng-1.6.12.tar.xz (LZMA-compressed, recommended)
+   libpng-1.6.12.tar.gz

 Source files with CRLF line endings (for Windows), without the
 "configure" script

-   lp1611b01.7z  (LZMA-compressed, recommended)
-   lp1611b01.zip
+   lpng1612.7z  (LZMA-compressed, recommended)
+   lpng1612.zip

 Other information:

-   1.6.11beta01-README.txt
-   1.6.11beta01-LICENSE.txt
-   libpng-1.6.11beta01-*.asc (armored detached GPG signatures)
+   libpng-1.6.12-README.txt
+   libpng-1.6.12-LICENSE.txt
+   libpng-1.6.12-*.asc (armored detached GPG signatures)

-Changes since the last public release (1.6.10):
-
-Version 1.6.11beta01 [March 17, 2014]
-  Use "if (value != 0)" instead of "if (value)" consistently.
-  Changed ZlibSrcDir from 1.2.5 to 1.2.8 in projects/vstudio.
-  Moved configuration information from the manual to the INSTALL file.
+Changes since the last public release (1.6.11):
+  Relocated new code from 1.6.11 in png.c to a point after the
+    declarations (Max Stepin).
+  Changed file permissions of contrib/tools/intgamma.sh,
+    test-driver, and compile from 0644 to 0755 (Cosmin).
+  Ensure "__has_attribute()" macro exists before trying to use it with
+    old clang compilers (MacPorts Ticket #43939).

 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit
--- a/64
+++ b/64
@@ -4345,8 +4345,9 @@ Version 1.6.0beta37 [January 10, 2013]
    programs to generate and test a PNG which should have the problem.

 Version 1.6.0beta39 [January 19, 2013]
-  Again corrected attempt at overflow detection in png_set_unknown_chunks().
-  Added overflow detection in png_set_sPLT() and png_set_text_2().
+  Again corrected attempt at overflow detection in png_set_unknown_chunks()
+  (CVE-2013-7353).  Added overflow detection in png_set_sPLT() and
+  png_set_text_2() (CVE-2013-7354).

 Version 1.6.0beta40 [January 20, 2013]
  Use consistent handling of overflows in text, sPLT and unknown png_set_* APIs
@@ -4880,6 +4881,65 @@ Version 1.6.11beta01 [March 17, 2014]
  Changed ZlibSrcDir from 1.2.5 to 1.2.8 in projects/vstudio.
  Moved configuration information from the manual to the INSTALL file.

+Version 1.6.11beta02 [April 6, 2014]
+  Removed #if/#else/#endif from inside two pow() calls in pngvalid.c because
+    they were handled improperly by Portland Group's PGI-14.1 - PGI-14.3
+    when using its "__builtin_pow()" function.
+  Silence 'unused parameter' build warnings (Cosmin Truta).
+  $(CP) is now used alongside $(RM_F).  Also, use 'copy' instead of 'cp'
+    where applicable, and applied other minor makefile changes (Cosmin).
+  Don't warn about invalid dimensions exceeding user limits (Cosmin).
+  Allow an easy replacement of the default pre-built configuration
+    header with a custom header, via the make PNGLIBCONF_H_PREBUILT
+    macro (Cosmin).
+
+Version 1.6.11beta03 [April 6, 2014]
+  Fixed a typo in pngrutil.c, introduced in libpng-1.5.6, that interferes
+    with "blocky" expansion of sub-8-bit interlaced PNG files (Eric Huss).
+  Optionally use  __builtin_bswap16() in png_do_swap().
+
+Version 1.6.11beta04 [April 19, 2014]
+  Made progressive reading of interlaced images consistent with the
+    behavior of the sequential reader and consistent with the manual, by
+    moving some code out of the PNG_READ_INTERLACING_SUPPORTED blocks. The
+    row_callback now receives the proper pass number and unexpanded rows, when
+    png_combine_row() isn't built or used, and png_set_interlace_handling()
+    is not called.
+  Allow PNG_sRGB_PROFILE_CHECKING = (-1) to mean no sRGB profile checking.
+
+Version 1.6.11beta05 [April 26, 2014]
+  Do not reject ICC V2 profiles that lack padding (Kai-Uwe Behrmann).
+  Relocated closing bracket of the sRGB profile test loop to avoid getting
+    "Not recognizing known sRGB profile that has been edited" warning for
+    ICC V2 profiles that lack the MD5 signature in the profile header.
+
+Version 1.6.11beta06 [May 19, 2014]
+  Added PNG_SKIP_sRGB_CHECK_PROFILE choice for png_set_option().
+
+Version 1.6.11rc01 [May 27, 2014]
+  No changes.
+
+Version 1.6.11rc02 [June 3, 2014]
+  Test ZLIB_VERNUM instead of PNG_ZLIB_VERNUM in contrib/tools/pngfix.c
+
+Version 1.6.11 [June 5, 2014]
+  No changes.
+
+Version 1.6.12rc01 [June 6, 2014]
+  Relocated new code from 1.6.11beta06 in png.c to a point after the
+    declarations (Max Stepin).
+
+Version 1.6.12rc02 [June 7, 2014]
+  Changed file permissions of contrib/tools/intgamma.sh,
+    test-driver, and compile from 0644 to 0755 (Cosmin).
+
+Version 1.6.12rc03 [June 8, 2014]
+  Ensure "__has_attribute()" macro exists before trying to use it with
+    old clang compilers (MacPorts Ticket #43939).
+
+Version 1.6.12 [June 12, 2014]
+  No changes.
+
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit
 https://lists.sourceforge.net/lists/listinfo/png-mng-implement
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -16,7 +16,7 @@ enable_testing()

 set(PNGLIB_MAJOR 1)
 set(PNGLIB_MINOR 6)
-set(PNGLIB_RELEASE 11)
+set(PNGLIB_RELEASE 12)
 set(PNGLIB_NAME libpng${PNGLIB_MAJOR}${PNGLIB_MINOR})
 set(PNGLIB_VERSION ${PNGLIB_MAJOR}.${PNGLIB_MINOR}.${PNGLIB_RELEASE})

@@ -252,7 +252,7 @@ endif(NOT WIN32 OR CYGWIN OR MINGW)
 # SET UP LINKS
 if(PNG_SHARED)
  set_target_properties(${PNG_LIB_NAME} PROPERTIES
-#   VERSION 16.${PNGLIB_RELEASE}.1.6.11beta01
+#   VERSION 16.${PNGLIB_RELEASE}.1.6.12
    VERSION 16.${PNGLIB_RELEASE}.0
    SOVERSION 16
    CLEAN_DIRECT_OUTPUT 1)
--- a/5
+++ b/5
@@ -52,6 +52,7 @@ III. Using scripts/makefile*
 Instead, you can use one of the custom-built makefiles in the
 "scripts" directory

+    cp scripts/pnglibconf.h.prebuilt pnglibconf.h
    cp scripts/makefile.system makefile
    make test
    make install
@@ -155,7 +156,9 @@ Copy the file (or files) that you need from the
 scripts directory into this directory, for example

   MSDOS example: copy scripts\makefile.msc makefile
-   UNIX example:    cp scripts/makefile.std makefile
+                  copy scripts\pnglibconf.h.prebuilt pnglibconf.h
+   UNIX example:  cp scripts/makefile.std makefile
+                  cp scripts/pnglibconf.h.prebuilt pnglibconf.h

 Read the makefile to see if you need to change any source or
 target directories to match your preferences.
--- a/4
+++ b/4
@@ -10,7 +10,7 @@ this sentence.

 This code is released under the libpng license.

-libpng versions 1.2.6, August 15, 2004, through 1.6.11beta01, March 17, 2014, are
+libpng versions 1.2.6, August 15, 2004, through 1.6.12, June 12, 2014, are
 Copyright (c) 2004, 2006-2014 Glenn Randers-Pehrson, and are
 distributed according to the same disclaimer and license as libpng-1.2.5
 with the following individual added to the list of Contributing Authors
@@ -108,4 +108,4 @@ certification mark of the Open Source Initiative.

 Glenn Randers-Pehrson
 glennrp at users.sourceforge.net
-March 17, 2014
+June 12, 2014
--- a/2
+++ b/2
@@ -1,4 +1,4 @@
-README for libpng version 1.6.11beta01 - March 17, 2014 (shared library 16.0)
+README for libpng version 1.6.12 - June 12, 2014 (shared library 16.0)
 See the note about version numbers near the top of png.h

 See INSTALL for instructions on how to install libpng.
--- a/arm/arm_init.c
+++ b/arm/arm_init.c
@@ -3,7 +3,7 @@
 *
 * Copyright (c) 2014 Glenn Randers-Pehrson
 * Written by Mans Rullgard, 2011.
- * Last changed in libpng 1.6.10 [(PENDING RELEASE)]
+ * Last changed in libpng 1.6.10 [June 12, 2014]
 *
 * This code is released under the libpng license.
 * For conditions of distribution and use, see the disclaimer
--- a/configure.ac
+++ b/configure.ac
@@ -18,7 +18,7 @@ AC_PREREQ([2.68])

 dnl Version number stuff here:

-AC_INIT([libpng],[1.6.11beta01],[png-mng-implement@lists.sourceforge.net])
+AC_INIT([libpng],[1.6.12],[png-mng-implement@lists.sourceforge.net])
 AC_CONFIG_MACRO_DIR([scripts])

 # libpng does not follow GNU file name conventions (hence 'foreign')
@@ -39,10 +39,10 @@ dnl automake, so the following is not necessary (and is not defined anyway):
 dnl AM_PREREQ([1.11.2])
 dnl stop configure from automagically running automake

-PNGLIB_VERSION=1.6.11beta01
+PNGLIB_VERSION=1.6.12
 PNGLIB_MAJOR=1
 PNGLIB_MINOR=6
-PNGLIB_RELEASE=11
+PNGLIB_RELEASE=12

 dnl End of version number stuff

--- a/contrib/libtests/pngvalid.c
+++ b/contrib/libtests/pngvalid.c
@@ -386,9 +386,9 @@ next_format(png_bytep colour_type, png_bytep bit_depth,

   /* Palette images are restricted to 8 bit depth */
   if (*bit_depth <= 8
-#     ifdef DO_16BIT
+#ifdef DO_16BIT
         || (*colour_type != 3 && *bit_depth <= 16)
-#     endif
+#endif
      )
      return 1;

@@ -3155,10 +3155,10 @@ init_standard_palette(png_store *ps, png_structp pp, png_infop pi, int npalette,
      for (; i<256; ++i)
         tRNS[i] = 24;

-#     ifdef PNG_WRITE_tRNS_SUPPORTED
+#  ifdef PNG_WRITE_tRNS_SUPPORTED
         if (j > 0)
            png_set_tRNS(pp, pi, tRNS, j, 0/*color*/);
-#     endif
+#  endif
   }
 }

@@ -6776,14 +6776,14 @@ image_transform_png_set_rgb_to_gray_ini(PNG_CONST image_transform *this,
          *  conversion adds another +/-2 in the 16-bit case and
          *  +/-(1<<(15-PNG_MAX_GAMMA_8)) in the 8-bit case.
          */
-         that->pm->limit += pow(
-#           if PNG_MAX_GAMMA_8 < 14
-               (that->this.bit_depth == 16 ? 8. :
-                  6. + (1<<(15-PNG_MAX_GAMMA_8)))
-#           else
-               8.
-#           endif
-               /65535, data.gamma);
+         that->pm->limit +=
+#        if PNG_MAX_GAMMA_8 < 14
+               pow((that->this.bit_depth == 16 ?
+                  8. : 6. + (1<<(15-PNG_MAX_GAMMA_8)))/65535, data.gamma);
+#        else
+               pow((that->this.bit_depth == 16 ?
+                  8. : 8. + (1<<(15-PNG_MAX_GAMMA_8)))/65535, data.gamma);
+#        endif
      }

      else
@@ -6801,13 +6801,12 @@ image_transform_png_set_rgb_to_gray_ini(PNG_CONST image_transform *this,
          * internal calculation errors, not the actual limit imposed by
          * pngvalid on the output errors.
          */
-         that->pm->limit += pow(
-#           if DIGITIZE
-               1.1
-#           else
-               1.
-#           endif
-               /255, data.gamma);
+         that->pm->limit +=
+#        if DIGITIZE
+             pow(1.1 /255, data.gamma);
+#        else
+             pow(1.0 /255, data.gamma);
+#        endif
      }
   }

--- a/contrib/pngminus/png2pnm.bat
+++ b/contrib/pngminus/png2pnm.bat
--- a/contrib/pngminus/png2pnm.sh
+++ b/contrib/pngminus/png2pnm.sh
--- a/contrib/pngminus/pngminus.bat
+++ b/contrib/pngminus/pngminus.bat
--- a/contrib/pngminus/pngminus.sh
+++ b/contrib/pngminus/pngminus.sh
--- a/contrib/pngminus/pnm2png.bat
+++ b/contrib/pngminus/pnm2png.bat
--- a/contrib/pngminus/pnm2png.sh
+++ b/contrib/pngminus/pnm2png.sh
--- a/contrib/tools/intgamma.sh
+++ b/contrib/tools/intgamma.sh
--- a/contrib/tools/pngfix.c
+++ b/contrib/tools/pngfix.c
@@ -79,7 +79,7 @@
 #  error "pngfix not supported in this libpng version"
 #endif

-#if PNG_ZLIB_VERNUM >= 0x1240
+#if ZLIB_VERNUM >= 0x1240

 /* Copied from pngpriv.h */
 #ifdef __cplusplus
@@ -4014,16 +4014,16 @@ main(int argc, const char **argv)
   return global_end(&global);
 }

-#else /* PNG_ZLIB_VERNUM < 0x1240 */
+#else /* ZLIB_VERNUM < 0x1240 */
 int
 main(void)
 {
   fprintf(stderr,
      "pngfix needs libpng with a zlib >=1.2.4 (not 0x%x)\n",
-      PNG_ZLIB_VERNUM);
+      ZLIB_VERNUM);
   return 77;
 }
-#endif /* PNG_ZLIB_VERNUM */
+#endif /* ZLIB_VERNUM */

 #else /* No read support */

--- a/example.c
+++ b/example.c
@@ -2,7 +2,7 @@
 #if 0 /* in case someone actually tries to compile this */

 /* example.c - an example of using libpng
- * Last changed in libpng 1.6.11 [(PENDING RELEASE)]
+ * Last changed in libpng 1.6.11 [June 12, 2014]
 * Maintained 1998-2014 Glenn Randers-Pehrson
 * Maintained 1996, 1997 Andreas Dilger)
 * Written 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
--- a/libpng-manual.txt
+++ b/libpng-manual.txt
@@ -1,6 +1,6 @@
 libpng-manual.txt - A description on how to use and modify libpng

- libpng version 1.6.11beta01 - March 17, 2014
+ libpng version 1.6.12 - June 12, 2014
 Updated and distributed by Glenn Randers-Pehrson
 <glennrp at users.sourceforge.net>
 Copyright (c) 1998-2014 Glenn Randers-Pehrson
@@ -11,15 +11,15 @@ libpng-manual.txt - A description on how to use and modify libpng

 Based on:

- libpng versions 0.97, January 1998, through 1.6.11beta01 - March 17, 2014
+ libpng versions 0.97, January 1998, through 1.6.12 - June 12, 2014
 Updated and distributed by Glenn Randers-Pehrson
 Copyright (c) 1998-2014 Glenn Randers-Pehrson

- libpng 1.0 beta 6  version 0.96 May 28, 1997
+ libpng 1.0 beta 6 - version 0.96 - May 28, 1997
 Updated and distributed by Andreas Dilger
 Copyright (c) 1996, 1997 Andreas Dilger

- libpng 1.0 beta 2 - version 0.88  January 26, 1996
+ libpng 1.0 beta 2 - version 0.88 - January 26, 1996
 For conditions of distribution and use, see copyright
 notice in png.h. Copyright (c) 1995, 1996 Guy Eric
 Schalnat, Group 42, Inc.
@@ -4293,6 +4293,8 @@ zlib.h for more information on what these mean.

    png_set_compression_method(png_ptr, method);

+This controls the size of the IDAT chunks (default 8192):
+
    png_set_compression_buffer_size(png_ptr, size);

 As of libpng version 1.5.4, additional APIs became
@@ -4754,8 +4756,6 @@ does not account for any palette index used by ancillary chunks such as the
 bKGD chunk; you must check those separately to determine the maximum
 palette index actually used.

-A. Changes that affect users of libpng
-
 There are no substantial API changes between the non-deprecated parts of
 the 1.4.5 API and the 1.5.0 API; however, the ability to directly access
 members of the main libpng control structures, png_struct and png_info,
@@ -5038,11 +5038,25 @@ Error detection in some chunks has improved; in particular the iCCP chunk
 reader now does pretty complete validation of the basic format.  Some bad
 profiles that were previously accepted are now accepted with a warning or
 rejected, depending upon the png_set_benign_errors() setting, in particular the
-very old broken Microsoft/HP 3144-byte sRGB profile.  The PNG spec requirement
-that only grayscale profiles may appear in images with color type 0 or 4 and
-that even if the image only contains gray pixels, only RGB profiles may appear
-in images with color type 2, 3, or 6, is now enforced.  The sRGB chunk
-is allowed to appear in images with any color type.
+very old broken Microsoft/HP 3144-byte sRGB profile.  Starting with
+libpng-1.6.11, recognizing and checking sRGB profiles can be avoided by
+means of
+
+    #ifdef PNG_SKIP_sRGB_CHECK_PROFILE
+       png_set_option(png_ptr, PNG_SKIP_sRGB_CHECK_PROFILE,
+           PNG_OPTION_ON);
+    #endif
+
+It's not a good idea to do this if you are using the "simplified API",
+which needs to be able to recognize an sRGB profile conveyed via the iCCP
+chunk.
+
+The PNG spec requirement that only grayscale profiles may appear in images
+with color type 0 or 4 and that even if the image only contains gray pixels,
+only RGB profiles may appear in images with color type 2, 3, or 6, is now
+enforced.  The sRGB chunk is allowed to appear in images with any color type
+and is interpreted by libpng to convey a one-tracer-curve profile or a
+three-tracer-curve profile as appropriate.

 Prior to libpng-1.6.0 a warning would be issued if the iTXt chunk contained
 an empty language field or an empty translated keyword.  Both of these
@@ -5076,16 +5090,16 @@ Libpng-1.6.0 through 1.6.2 used the CMF bytes at the beginning of the IDAT
 stream to set the size of the sliding window for reading instead of using the
 default 32-kbyte sliding window size.  It was discovered that there are
 hundreds of PNG files in the wild that have incorrect CMF bytes that caused
-libpng to issue a "too far back" error and reject the file.  Libpng-1.6.3 and
-later calculate their own safe CMF from the image dimensions, provide a way
-to revert to the libpng-1.5.x behavior (ignoring the CMF bytes and using a
-32-kbyte sliding window), by using
+zlib to issue the "invalid distance too far back" error and reject the file.
+Libpng-1.6.3 and later calculate their own safe CMF from the image dimensions,
+provide a way to revert to the libpng-1.5.x behavior (ignoring the CMF bytes
+and using a 32-kbyte sliding window), by using

    png_set_option(png_ptr, PNG_MAXIMUM_INFLATE_WINDOW,
        PNG_OPTION_ON);

-and provide a tool (contrib/tools/pngfix) for optimizing the CMF bytes
-correctly.
+and provide a tool (contrib/tools/pngfix) for rewriting a PNG file while
+optimizing the CMF bytes in its IDAT chunk correctly.

 Libpng-1.6.0 and libpng-1.6.1 wrote uncompressed iTXt chunks with the wrong
 length, which resulted in PNG files that cannot be read beyond the bad iTXt
@@ -5127,7 +5141,8 @@ mailing list, or directly to glennrp.

 XV. Coding style

-Our coding style is similar to the "Allman" style, with curly
+Our coding style is similar to the "Allman" style
+(See http://en.wikipedia.org/wiki/Indent_style#Allman_style), with curly
 braces on separate lines:

    if (condition)
@@ -5260,13 +5275,13 @@ Other rules can be inferred by inspecting the libpng source.

 XVI. Y2K Compliance in libpng

-March 17, 2014
+June 12, 2014

 Since the PNG Development group is an ad-hoc body, we can't make
 an official declaration.

 This is your unofficial assurance that libpng from version 0.71 and
-upward through 1.6.11beta01 are Y2K compliant.  It is my belief that earlier
+upward through 1.6.12 are Y2K compliant.  It is my belief that earlier
 versions were also Y2K compliant.

 Libpng only has two year fields.  One is a 2-byte unsigned integer
--- a/libpng.3
+++ b/libpng.3
@@ -1,6 +1,6 @@
-.TH LIBPNG 3 "March 17, 2014"
+.TH LIBPNG 3 "June 12, 2014"
 .SH NAME
-libpng \- Portable Network Graphics (PNG) Reference Library 1.6.11beta01
+libpng \- Portable Network Graphics (PNG) Reference Library 1.6.12
 .SH SYNOPSIS
 \fB
 #include <png.h>\fP
@@ -504,7 +504,7 @@ Following is a copy of the libpng-manual.txt file that accompanies libpng.
 .SH LIBPNG.TXT
 libpng-manual.txt - A description on how to use and modify libpng

- libpng version 1.6.11beta01 - March 17, 2014
+ libpng version 1.6.12 - June 12, 2014
 Updated and distributed by Glenn Randers-Pehrson
 <glennrp at users.sourceforge.net>
 Copyright (c) 1998-2014 Glenn Randers-Pehrson
@@ -515,15 +515,15 @@ libpng-manual.txt - A description on how to use and modify libpng

 Based on:

- libpng versions 0.97, January 1998, through 1.6.11beta01 - March 17, 2014
+ libpng versions 0.97, January 1998, through 1.6.12 - June 12, 2014
 Updated and distributed by Glenn Randers-Pehrson
 Copyright (c) 1998-2014 Glenn Randers-Pehrson

- libpng 1.0 beta 6  version 0.96 May 28, 1997
+ libpng 1.0 beta 6 - version 0.96 - May 28, 1997
 Updated and distributed by Andreas Dilger
 Copyright (c) 1996, 1997 Andreas Dilger

- libpng 1.0 beta 2 - version 0.88  January 26, 1996
+ libpng 1.0 beta 2 - version 0.88 - January 26, 1996
 For conditions of distribution and use, see copyright
 notice in png.h. Copyright (c) 1995, 1996 Guy Eric
 Schalnat, Group 42, Inc.
@@ -4797,6 +4797,8 @@ zlib.h for more information on what these mean.

    png_set_compression_method(png_ptr, method);

+This controls the size of the IDAT chunks (default 8192):
+
    png_set_compression_buffer_size(png_ptr, size);

 As of libpng version 1.5.4, additional APIs became
@@ -5258,8 +5260,6 @@ does not account for any palette index used by ancillary chunks such as the
 bKGD chunk; you must check those separately to determine the maximum
 palette index actually used.

-A. Changes that affect users of libpng
-
 There are no substantial API changes between the non-deprecated parts of
 the 1.4.5 API and the 1.5.0 API; however, the ability to directly access
 members of the main libpng control structures, png_struct and png_info,
@@ -5542,11 +5542,25 @@ Error detection in some chunks has improved; in particular the iCCP chunk
 reader now does pretty complete validation of the basic format.  Some bad
 profiles that were previously accepted are now accepted with a warning or
 rejected, depending upon the png_set_benign_errors() setting, in particular the
-very old broken Microsoft/HP 3144-byte sRGB profile.  The PNG spec requirement
-that only grayscale profiles may appear in images with color type 0 or 4 and
-that even if the image only contains gray pixels, only RGB profiles may appear
-in images with color type 2, 3, or 6, is now enforced.  The sRGB chunk
-is allowed to appear in images with any color type.
+very old broken Microsoft/HP 3144-byte sRGB profile.  Starting with
+libpng-1.6.11, recognizing and checking sRGB profiles can be avoided by
+means of
+
+    #ifdef PNG_SKIP_sRGB_CHECK_PROFILE
+       png_set_option(png_ptr, PNG_SKIP_sRGB_CHECK_PROFILE,
+           PNG_OPTION_ON);
+    #endif
+
+It's not a good idea to do this if you are using the "simplified API",
+which needs to be able to recognize an sRGB profile conveyed via the iCCP
+chunk.
+
+The PNG spec requirement that only grayscale profiles may appear in images
+with color type 0 or 4 and that even if the image only contains gray pixels,
+only RGB profiles may appear in images with color type 2, 3, or 6, is now
+enforced.  The sRGB chunk is allowed to appear in images with any color type
+and is interpreted by libpng to convey a one-tracer-curve profile or a
+three-tracer-curve profile as appropriate.

 Prior to libpng-1.6.0 a warning would be issued if the iTXt chunk contained
 an empty language field or an empty translated keyword.  Both of these
@@ -5580,16 +5594,16 @@ Libpng-1.6.0 through 1.6.2 used the CMF bytes at the beginning of the IDAT
 stream to set the size of the sliding window for reading instead of using the
 default 32-kbyte sliding window size.  It was discovered that there are
 hundreds of PNG files in the wild that have incorrect CMF bytes that caused
-libpng to issue a "too far back" error and reject the file.  Libpng-1.6.3 and
-later calculate their own safe CMF from the image dimensions, provide a way
-to revert to the libpng-1.5.x behavior (ignoring the CMF bytes and using a
-32-kbyte sliding window), by using
+zlib to issue the "invalid distance too far back" error and reject the file.
+Libpng-1.6.3 and later calculate their own safe CMF from the image dimensions,
+provide a way to revert to the libpng-1.5.x behavior (ignoring the CMF bytes
+and using a 32-kbyte sliding window), by using

    png_set_option(png_ptr, PNG_MAXIMUM_INFLATE_WINDOW,
        PNG_OPTION_ON);

-and provide a tool (contrib/tools/pngfix) for optimizing the CMF bytes
-correctly.
+and provide a tool (contrib/tools/pngfix) for rewriting a PNG file while
+optimizing the CMF bytes in its IDAT chunk correctly.

 Libpng-1.6.0 and libpng-1.6.1 wrote uncompressed iTXt chunks with the wrong
 length, which resulted in PNG files that cannot be read beyond the bad iTXt
@@ -5631,7 +5645,8 @@ mailing list, or directly to glennrp.

 .SH XV. Coding style

-Our coding style is similar to the "Allman" style, with curly
+Our coding style is similar to the "Allman" style
+(See http://en.wikipedia.org/wiki/Indent_style#Allman_style), with curly
 braces on separate lines:

    if (condition)
@@ -5764,13 +5779,13 @@ Other rules can be inferred by inspecting the libpng source.

 .SH XVI. Y2K Compliance in libpng

-March 17, 2014
+June 12, 2014

 Since the PNG Development group is an ad-hoc body, we can't make
 an official declaration.

 This is your unofficial assurance that libpng from version 0.71 and
-upward through 1.6.11beta01 are Y2K compliant.  It is my belief that earlier
+upward through 1.6.12 are Y2K compliant.  It is my belief that earlier
 versions were also Y2K compliant.

 Libpng only has two year fields.  One is a 2-byte unsigned integer
@@ -6004,7 +6019,11 @@ the first widely used release:
 1.6.10beta01-03     16    10610  16.so.16.10[.0]
 1.6.10rc01-03       16    10610  16.so.16.10[.0]
 1.6.10              16    10610  16.so.16.10[.0]
- 1.6.10beta01        16    10611  16.so.16.11[.0]
+ 1.6.11beta01-06     16    10611  16.so.16.11[.0]
+ 1.6.11rc01-02       16    10611  16.so.16.11[.0]
+ 1.6.11              16    10611  16.so.16.11[.0]
+ 1.6.12rc01          16    10612  16.so.16.12[.0]
+ 1.6.12              16    10612  16.so.16.12[.0]

 Henceforth the source version will match the shared-library minor
 and patch numbers; the shared-library major version number will be
@@ -6061,7 +6080,7 @@ possible without all of you.

 Thanks to Frank J. T. Wojcik for helping with the documentation.

-Libpng version 1.6.11beta01 - March 17, 2014:
+Libpng version 1.6.12 - June 12, 2014:
 Initially created in 1995 by Guy Eric Schalnat, then of Group 42, Inc.
 Currently maintained by Glenn Randers-Pehrson (glennrp at users.sourceforge.net).

@@ -6084,8 +6103,8 @@ this sentence.

 This code is released under the libpng license.

-libpng versions 1.2.6, August 15, 2004, through 1.6.11beta01, March 17, 2014, are
-Copyright (c) 2004,2006-2007 Glenn Randers-Pehrson, and are
+libpng versions 1.2.6, August 15, 2004, through 1.6.12, June 12, 2014, are
+Copyright (c) 2004,2006-2014 Glenn Randers-Pehrson, and are
 distributed according to the same disclaimer and license as libpng-1.2.5
 with the following individual added to the list of Contributing Authors

@@ -6183,7 +6202,7 @@ certification mark of the Open Source Initiative.

 Glenn Randers-Pehrson
 glennrp at users.sourceforge.net
-March 17, 2014
+June 12, 2014

 .\" end of man page

--- a/libpngpf.3
+++ b/libpngpf.3
@@ -1,6 +1,6 @@
-.TH LIBPNGPF 3 "March 17, 2014"
+.TH LIBPNGPF 3 "June 12, 2014"
 .SH NAME
-libpng \- Portable Network Graphics (PNG) Reference Library 1.6.11beta01
+libpng \- Portable Network Graphics (PNG) Reference Library 1.6.12
 (private functions)
 .SH SYNOPSIS
 \fB#include \fI"pngpriv.h"
--- a/png.5
+++ b/png.5
@@ -1,4 +1,4 @@
-.TH PNG 5 "March 17, 2014"
+.TH PNG 5 "June 12, 2014"
 .SH NAME
 png \- Portable Network Graphics (PNG) format
 .SH DESCRIPTION
--- a/png.c
+++ b/png.c
@@ -1,7 +1,7 @@

 /* png.c - location for general purpose libpng functions
 *
- * Last changed in libpng 1.6.11 [(PENDING RELEASE)]
+ * Last changed in libpng 1.6.12 [June 12, 2014]
 * Copyright (c) 1998-2014 Glenn Randers-Pehrson
 * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
 * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -14,7 +14,7 @@
 #include "pngpriv.h"

 /* Generate a compiler error if there is an old png.h in the search path. */
-typedef png_libpng_version_1_6_11beta01 Your_png_h_is_not_version_1_6_11beta01;
+typedef png_libpng_version_1_6_12 Your_png_h_is_not_version_1_6_12;

 /* Tells libpng that we have already handled the first "num_bytes" bytes
 * of the PNG file signature.  If the PNG data is embedded into another
@@ -773,13 +773,13 @@ png_get_copyright(png_const_structrp png_ptr)
 #else
 #  ifdef __STDC__
   return PNG_STRING_NEWLINE \
-     "libpng version 1.6.11beta01 - March 17, 2014" PNG_STRING_NEWLINE \
+     "libpng version 1.6.12 - June 12, 2014" PNG_STRING_NEWLINE \
     "Copyright (c) 1998-2014 Glenn Randers-Pehrson" PNG_STRING_NEWLINE \
     "Copyright (c) 1996-1997 Andreas Dilger" PNG_STRING_NEWLINE \
     "Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc." \
     PNG_STRING_NEWLINE;
 #  else
-      return "libpng version 1.6.11beta01 - March 17, 2014\
+      return "libpng version 1.6.12 - June 12, 2014\
      Copyright (c) 1998-2014 Glenn Randers-Pehrson\
      Copyright (c) 1996-1997 Andreas Dilger\
      Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.";
@@ -1906,10 +1906,6 @@ png_icc_check_length(png_const_structrp png_ptr, png_colorspacerp colorspace,
      return png_icc_profile_error(png_ptr, colorspace, name, profile_length,
         "too short");

-   if (profile_length & 3)
-      return png_icc_profile_error(png_ptr, colorspace, name, profile_length,
-         "invalid length");
-
   return 1;
 }

@@ -1930,6 +1926,11 @@ png_icc_check_header(png_const_structrp png_ptr, png_colorspacerp colorspace,
      return png_icc_profile_error(png_ptr, colorspace, name, temp,
         "length does not match profile");

+   temp = (png_uint_32) (*(profile+8));
+   if (temp > 3 && (profile_length & 3))
+      return png_icc_profile_error(png_ptr, colorspace, name, profile_length,
+         "invalid length");
+
   temp = png_get_uint_32(profile+128); /* tag count: 12 bytes/tag */
   if (temp > 357913930 || /* (2^32-4-132)/12: maximum possible tag count */
      profile_length < 132+12*temp) /* truncated tag table */
@@ -2044,7 +2045,7 @@ png_icc_check_header(png_const_structrp png_ptr, png_colorspacerp colorspace,
            "invalid embedded Abstract ICC profile");

      case 0x6C696E6B: /* 'link' */
-         /* DeviceLink profiles cannnot be interpreted in a non-device specific
+         /* DeviceLink profiles cannot be interpreted in a non-device specific
          * fashion, if an app uses the AToB0Tag in the profile the results are
          * undefined unless the result is sent to the intended device,
          * therefore a DeviceLink profile should not be found embedded in a
@@ -2055,7 +2056,7 @@ png_icc_check_header(png_const_structrp png_ptr, png_colorspacerp colorspace,

      case 0x6E6D636C: /* 'nmcl' */
         /* A NamedColor profile is also device specific, however it doesn't
-          * contain an AToB0 tag that is open to misintrepretation.  Almost
+          * contain an AToB0 tag that is open to misinterpretation.  Almost
          * certainly it will fail the tests below.
          */
         (void)png_icc_profile_error(png_ptr, NULL, name, temp,
@@ -2136,7 +2137,7 @@ png_icc_check_tag_table(png_const_structrp png_ptr, png_colorspacerp colorspace,
   return 1; /* success, maybe with warnings */
 }

-#ifdef PNG_sRGB_SUPPORTED
+#if defined(PNG_sRGB_SUPPORTED) && PNG_sRGB_PROFILE_CHECKS >= 0
 /* Information about the known ICC sRGB profiles */
 static const struct
 {
@@ -2210,6 +2211,7 @@ png_compare_ICC_profile_with_sRGB(png_const_structrp png_ptr,
    * by sRGB (but maybe defined by a later ICC specification) the read of
    * the profile will fail at that point.
    */
+
   png_uint_32 length = 0;
   png_uint_32 intent = 0x10000; /* invalid */
 #if PNG_sRGB_PROFILE_CHECKS > 1
@@ -2217,6 +2219,11 @@ png_compare_ICC_profile_with_sRGB(png_const_structrp png_ptr,
 #endif
   unsigned int i;

+   /* First see if PNG_SKIP_sRGB_CHECK_PROFILE has been set to "on" */
+   if (((png_ptr->options >> PNG_SKIP_sRGB_CHECK_PROFILE) & 3) ==
+               PNG_OPTION_ON)
+      return 0;
+
   for (i=0; i < (sizeof png_sRGB_checks) / (sizeof png_sRGB_checks[0]); ++i)
   {
      if (png_get_uint_32(profile+84) == png_sRGB_checks[i].md5[0] &&
@@ -2294,7 +2301,6 @@ png_compare_ICC_profile_with_sRGB(png_const_structrp png_ptr,
                  return 1+png_sRGB_checks[i].is_broken;
               }
            }
-         }

 # if PNG_sRGB_PROFILE_CHECKS > 0
         /* The signature matched, but the profile had been changed in some
@@ -2306,6 +2312,7 @@ png_compare_ICC_profile_with_sRGB(png_const_structrp png_ptr,
             PNG_CHUNK_WARNING);
         break;
 # endif
+         }
      }
   }

@@ -2321,7 +2328,9 @@ png_icc_set_sRGB(png_const_structrp png_ptr,
   /* Is this profile one of the known ICC sRGB profiles?  If it is, just set
    * the sRGB information.
    */
+#if PNG_sRGB_PROFILE_CHECKS >= 0
   if (png_compare_ICC_profile_with_sRGB(png_ptr, profile, adler))
+#endif
      (void)png_colorspace_set_sRGB(png_ptr, colorspace,
         (int)/*already checked*/png_get_uint_32(profile+64));
 }
@@ -2435,45 +2444,46 @@ png_check_IHDR(png_const_structrp png_ptr,
      png_warning(png_ptr, "Image width is zero in IHDR");
      error = 1;
   }
+   else if (width > PNG_UINT_31_MAX)
+   {
+      png_warning(png_ptr, "Invalid image width in IHDR");
+      error = 1;
+   }
+   else
+   {
+#     ifdef PNG_SET_USER_LIMITS_SUPPORTED
+      if (width > png_ptr->user_width_max)
+#     else
+      if (width > PNG_USER_WIDTH_MAX)
+#     endif
+      {
+         png_warning(png_ptr, "Image width exceeds user limit in IHDR");
+         error = 1;
+      }
+   }

   if (height == 0)
   {
      png_warning(png_ptr, "Image height is zero in IHDR");
      error = 1;
   }
-
-#  ifdef PNG_SET_USER_LIMITS_SUPPORTED
-   if (width > png_ptr->user_width_max)
-
-#  else
-   if (width > PNG_USER_WIDTH_MAX)
-#  endif
-   {
-      png_warning(png_ptr, "Image width exceeds user limit in IHDR");
-      error = 1;
-   }
-
-#  ifdef PNG_SET_USER_LIMITS_SUPPORTED
-   if (height > png_ptr->user_height_max)
-#  else
-   if (height > PNG_USER_HEIGHT_MAX)
-#  endif
-   {
-      png_warning(png_ptr, "Image height exceeds user limit in IHDR");
-      error = 1;
-   }
-
-   if (width > PNG_UINT_31_MAX)
-   {
-      png_warning(png_ptr, "Invalid image width in IHDR");
-      error = 1;
-   }
-
-   if (height > PNG_UINT_31_MAX)
+   else if (height > PNG_UINT_31_MAX)
   {
      png_warning(png_ptr, "Invalid image height in IHDR");
      error = 1;
   }
+   else
+   {
+#     ifdef PNG_SET_USER_LIMITS_SUPPORTED
+      if (height > png_ptr->user_height_max)
+#     else
+      if (height > PNG_USER_HEIGHT_MAX)
+#     endif
+      {
+         png_warning(png_ptr, "Image height exceeds user limit in IHDR");
+         error = 1;
+      }
+   }

   /* Check other values */
   if (bit_depth != 1 && bit_depth != 2 && bit_depth != 4 &&
@@ -4092,7 +4102,7 @@ png_build_gamma_table(png_structrp png_ptr, int bit_depth)
 }
 #endif /* READ_GAMMA */

-/* HARDWARE OPTION SUPPORT */
+/* HARDWARE OR SOFTWARE OPTION SUPPORT */
 #ifdef PNG_SET_OPTION_SUPPORTED
 int PNGAPI
 png_set_option(png_structrp png_ptr, int option, int onoff)
--- a/png.h
+++ b/png.h
@@ -1,7 +1,7 @@

 /* png.h - header file for PNG reference library
 *
- * libpng version 1.6.11beta01 - March 17, 2014
+ * libpng version 1.6.12 - June 12, 2014
 * Copyright (c) 1998-2014 Glenn Randers-Pehrson
 * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
 * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -11,7 +11,7 @@
 * Authors and maintainers:
 *   libpng versions 0.71, May 1995, through 0.88, January 1996: Guy Schalnat
 *   libpng versions 0.89c, June 1996, through 0.96, May 1997: Andreas Dilger
- *   libpng versions 0.97, January 1998, through 1.6.11beta01 - March 17, 2014: Glenn
+ *   libpng versions 0.97, January 1998, through 1.6.12 - June 12, 2014: Glenn
 *   See also "Contributing Authors", below.
 *
 * Note about libpng version numbers:
@@ -195,7 +195,11 @@
 *    1.6.10beta01-03         16    10610  16.so.16.10[.0]
 *    1.6.10rc01-03           16    10610  16.so.16.10[.0]
 *    1.6.10                  16    10610  16.so.16.10[.0]
- *    1.6.11beta01            16    10611  16.so.16.11[.0]
+ *    1.6.11beta01-06         16    10611  16.so.16.11[.0]
+ *    1.6.11rc01-02           16    10611  16.so.16.11[.0]
+ *    1.6.11                  16    10611  16.so.16.11[.0]
+ *    1.6.12rc01-03           16    10612  16.so.16.12[.0]
+ *    1.6.12                  16    10612  16.so.16.12[.0]
 *
 *   Henceforth the source version will match the shared-library major
 *   and minor numbers; the shared-library major version number will be
@@ -227,8 +231,8 @@
 *
 * This code is released under the libpng license.
 *
- * libpng versions 1.2.6, August 15, 2004, through 1.6.11beta01, March 17, 2014, are
- * Copyright (c) 2004, 2006-2013 Glenn Randers-Pehrson, and are
+ * libpng versions 1.2.6, August 15, 2004, through 1.6.12, June 12, 2014, are
+ * Copyright (c) 2004, 2006-2014 Glenn Randers-Pehrson, and are
 * distributed according to the same disclaimer and license as libpng-1.2.5
 * with the following individual added to the list of Contributing Authors:
 *
@@ -339,13 +343,13 @@
 * Y2K compliance in libpng:
 * =========================
 *
- *    March 17, 2014
+ *    June 12, 2014
 *
 *    Since the PNG Development group is an ad-hoc body, we can't make
 *    an official declaration.
 *
 *    This is your unofficial assurance that libpng from version 0.71 and
- *    upward through 1.6.11beta01 are Y2K compliant.  It is my belief that
+ *    upward through 1.6.12 are Y2K compliant.  It is my belief that
 *    earlier versions were also Y2K compliant.
 *
 *    Libpng only has two year fields.  One is a 2-byte unsigned integer
@@ -407,9 +411,9 @@
 */

 /* Version information for png.h - this should match the version in png.c */
-#define PNG_LIBPNG_VER_STRING "1.6.11beta01"
+#define PNG_LIBPNG_VER_STRING "1.6.12"
 #define PNG_HEADER_VERSION_STRING \
-     " libpng version 1.6.11beta01 - March 17, 2014\n"
+     " libpng version 1.6.12 - June 12, 2014\n"

 #define PNG_LIBPNG_VER_SONUM   16
 #define PNG_LIBPNG_VER_DLLNUM  16
@@ -417,13 +421,13 @@
 /* These should match the first 3 components of PNG_LIBPNG_VER_STRING: */
 #define PNG_LIBPNG_VER_MAJOR   1
 #define PNG_LIBPNG_VER_MINOR   6
-#define PNG_LIBPNG_VER_RELEASE 11
+#define PNG_LIBPNG_VER_RELEASE 12

 /* This should match the numeric part of the final component of
 * PNG_LIBPNG_VER_STRING, omitting any leading zero:
 */

-#define PNG_LIBPNG_VER_BUILD  01
+#define PNG_LIBPNG_VER_BUILD  0

 /* Release Status */
 #define PNG_LIBPNG_BUILD_ALPHA    1
@@ -440,7 +444,7 @@
 #define PNG_LIBPNG_BUILD_SPECIAL 32 /* Cannot be OR'ed with
                                       PNG_LIBPNG_BUILD_PRIVATE */

-#define PNG_LIBPNG_BUILD_BASE_TYPE PNG_LIBPNG_BUILD_BETA
+#define PNG_LIBPNG_BUILD_BASE_TYPE PNG_LIBPNG_BUILD_STABLE

 /* Careful here.  At one time, Guy wanted to use 082, but that would be octal.
 * We must not include leading zeros.
@@ -448,7 +452,7 @@
 * version 1.0.0 was mis-numbered 100 instead of 10000).  From
 * version 1.0.1 it's    xxyyzz, where x=major, y=minor, z=release
 */
-#define PNG_LIBPNG_VER 10611 /* 1.6.11 */
+#define PNG_LIBPNG_VER 10612 /* 1.6.12 */

 /* Library configuration: these options cannot be changed after
 * the library has been built.
@@ -553,7 +557,7 @@ extern "C" {
 /* This triggers a compiler error in png.c, if png.c and png.h
 * do not agree upon the version number.
 */
-typedef char* png_libpng_version_1_6_11beta01;
+typedef char* png_libpng_version_1_6_12;

 /* Basic control structions.  Read libpng-manual.txt or libpng.3 for more info.
 *
@@ -1852,7 +1856,6 @@ PNG_EXPORT(219, png_size_t, png_process_data_pause, (png_structrp, int save));
 */
 PNG_EXPORT(220, png_uint_32, png_process_data_skip, (png_structrp));

-#ifdef PNG_READ_INTERLACING_SUPPORTED
 /* Function that combines rows.  'new_row' is a flag that should come from
 * the callback and be non-NULL if anything needs to be done; the library
 * stores its own version of the new data internally and ignores the passed
@@ -1860,7 +1863,6 @@ PNG_EXPORT(220, png_uint_32, png_process_data_skip, (png_structrp));
 */
 PNG_EXPORT(93, void, png_progressive_combine_row, (png_const_structrp png_ptr,
    png_bytep old_row, png_const_bytep new_row));
-#endif /* PNG_READ_INTERLACING_SUPPORTED */
 #endif /* PNG_PROGRESSIVE_READ_SUPPORTED */

 PNG_EXPORTA(94, png_voidp, png_malloc, (png_const_structrp png_ptr,
@@ -3228,7 +3230,8 @@ PNG_EXPORT(243, int, png_get_palette_max, (png_const_structp png_ptr,
 #  define PNG_ARM_NEON   0 /* HARDWARE: ARM Neon SIMD instructions supported */
 #endif
 #define PNG_MAXIMUM_INFLATE_WINDOW 2 /* SOFTWARE: force maximum window */
-#define PNG_OPTION_NEXT  4 /* Next option - numbers must be even */
+#define PNG_SKIP_sRGB_CHECK_PROFILE 4 /* SOFTWARE: Check ICC profile for sRGB */
+#define PNG_OPTION_NEXT  6 /* Next option - numbers must be even */

 /* Return values: NOTE: there are four values and 'off' is *not* zero */
 #define PNG_OPTION_UNSET   0 /* Unset - defaults to off */
@@ -3241,7 +3244,7 @@ PNG_EXPORT(244, int, png_set_option, (png_structrp png_ptr, int option,
 #endif

 /*******************************************************************************
- *  END OF HARDWARE OPTIONS
+ *  END OF HARDWARE AND SOFTWARE OPTIONS
 ******************************************************************************/

 /* Maintainer: Put new public prototypes here ^, in libpng.3, and project
--- a/pngconf.h
+++ b/pngconf.h
@@ -1,9 +1,9 @@

 /* pngconf.h - machine configurable file for libpng
 *
- * libpng version 1.6.11beta01 - March 17, 2014
+ * libpng version 1.6.12 - June 12, 2014
 *
- * Copyright (c) 1998-2013 Glenn Randers-Pehrson
+ * Copyright (c) 1998-2014 Glenn Randers-Pehrson
 * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
 * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
 *
@@ -361,7 +361,7 @@
   * version 1.2.41.  Disabling these removes the warnings but may also produce
   * less efficient code.
   */
-#  if defined(__clang__)
+#  if defined(__clang__) && defined(__has_attribute)
     /* Clang defines both __clang__ and __GNUC__. Check __clang__ first. */
 #    if !defined(PNG_USE_RESULT) && __has_attribute(__warn_unused_result__)
 #      define PNG_USE_RESULT __attribute__((__warn_unused_result__))
--- a/pngerror.c
+++ b/pngerror.c
@@ -1,7 +1,7 @@

 /* pngerror.c - stub functions for i/o and memory allocation
 *
- * Last changed in libpng 1.6.11 [(PENDING RELEASE)]
+ * Last changed in libpng 1.6.11 [June 12, 2014]
 * Copyright (c) 1998-2014 Glenn Randers-Pehrson
 * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
 * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -759,6 +759,9 @@ png_longjmp,(png_const_structrp png_ptr, int val),PNG_NORETURN)
 #ifdef PNG_SETJMP_SUPPORTED
   if (png_ptr && png_ptr->longjmp_fn && png_ptr->jmp_buf_ptr)
      png_ptr->longjmp_fn(*png_ptr->jmp_buf_ptr, val);
+#else
+   PNG_UNUSED(png_ptr)
+   PNG_UNUSED(val)
 #endif

   /* If control reaches this point, png_longjmp() must not return. The only
--- a/pngget.c
+++ b/pngget.c
@@ -1,8 +1,8 @@

 /* pngget.c - retrieval of values from info struct
 *
- * Last changed in libpng 1.6.1 [March 28, 2013]
- * Copyright (c) 1998-2013 Glenn Randers-Pehrson
+ * Last changed in libpng 1.6.11 [June 12, 2014]
+ * Copyright (c) 1998-2014 Glenn Randers-Pehrson
 * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
 * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
 *
@@ -124,6 +124,9 @@ png_get_x_pixels_per_meter(png_const_structrp png_ptr, png_const_inforp
         if (info_ptr->phys_unit_type == PNG_RESOLUTION_METER)
            return (info_ptr->x_pixels_per_unit);
      }
+#else
+   PNG_UNUSED(png_ptr)
+   PNG_UNUSED(info_ptr)
 #endif

   return (0);
@@ -142,6 +145,9 @@ png_get_y_pixels_per_meter(png_const_structrp png_ptr, png_const_inforp
      if (info_ptr->phys_unit_type == PNG_RESOLUTION_METER)
         return (info_ptr->y_pixels_per_unit);
   }
+#else
+   PNG_UNUSED(png_ptr)
+   PNG_UNUSED(info_ptr)
 #endif

   return (0);
@@ -159,6 +165,9 @@ png_get_pixels_per_meter(png_const_structrp png_ptr, png_const_inforp info_ptr)
          info_ptr->x_pixels_per_unit == info_ptr->y_pixels_per_unit)
         return (info_ptr->x_pixels_per_unit);
   }
+#else
+   PNG_UNUSED(png_ptr)
+   PNG_UNUSED(info_ptr)
 #endif

   return (0);
@@ -229,6 +238,9 @@ png_get_x_offset_microns(png_const_structrp png_ptr, png_const_inforp info_ptr)
      if (info_ptr->offset_unit_type == PNG_OFFSET_MICROMETER)
         return (info_ptr->x_offset);
   }
+#else
+   PNG_UNUSED(png_ptr)
+   PNG_UNUSED(info_ptr)
 #endif

   return (0);
@@ -245,6 +257,9 @@ png_get_y_offset_microns(png_const_structrp png_ptr, png_const_inforp info_ptr)
      if (info_ptr->offset_unit_type == PNG_OFFSET_MICROMETER)
         return (info_ptr->y_offset);
   }
+#else
+   PNG_UNUSED(png_ptr)
+   PNG_UNUSED(info_ptr)
 #endif

   return (0);
@@ -261,6 +276,9 @@ png_get_x_offset_pixels(png_const_structrp png_ptr, png_const_inforp info_ptr)
      if (info_ptr->offset_unit_type == PNG_OFFSET_PIXEL)
         return (info_ptr->x_offset);
   }
+#else
+   PNG_UNUSED(png_ptr)
+   PNG_UNUSED(info_ptr)
 #endif

   return (0);
@@ -277,6 +295,9 @@ png_get_y_offset_pixels(png_const_structrp png_ptr, png_const_inforp info_ptr)
      if (info_ptr->offset_unit_type == PNG_OFFSET_PIXEL)
         return (info_ptr->y_offset);
   }
+#else
+   PNG_UNUSED(png_ptr)
+   PNG_UNUSED(info_ptr)
 #endif

   return (0);
--- a/pngpread.c
+++ b/pngpread.c
@@ -1,7 +1,7 @@

 /* pngpread.c - read a png file in push mode
 *
- * Last changed in libpng 1.6.11 [(PENDING RELEASE)]
+ * Last changed in libpng 1.6.11 [June 12, 2014]
 * Copyright (c) 1998-2014 Glenn Randers-Pehrson
 * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
 * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -979,15 +979,15 @@ png_push_process_row(png_structrp png_ptr)


 #ifdef PNG_READ_INTERLACING_SUPPORTED
-   /* Blow up interlaced rows to full size */
+   /* Expand interlaced rows to full size */
   if (png_ptr->interlaced && (png_ptr->transformations & PNG_INTERLACE))
   {
      if (png_ptr->pass < 6)
         png_do_read_interlace(&row_info, png_ptr->row_buf + 1, png_ptr->pass,
            png_ptr->transformations);

-    switch (png_ptr->pass)
-    {
+      switch (png_ptr->pass)
+      {
         case 0:
         {
            int i;
@@ -1154,7 +1154,6 @@ png_push_process_row(png_structrp png_ptr)
      }
   }
   else
-#endif
   {
      png_push_have_row(png_ptr, png_ptr->row_buf + 1);
      png_read_push_finish_row(png_ptr);
@@ -1164,7 +1163,6 @@ png_push_process_row(png_structrp png_ptr)
 void /* PRIVATE */
 png_read_push_finish_row(png_structrp png_ptr)
 {
-#ifdef PNG_READ_INTERLACING_SUPPORTED
   /* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */

   /* Start of interlace block */
@@ -1189,7 +1187,6 @@ png_read_push_finish_row(png_structrp png_ptr)
   if (png_ptr->row_number < png_ptr->num_rows)
      return;

-#ifdef PNG_READ_INTERLACING_SUPPORTED
   if (png_ptr->interlaced)
   {
      png_ptr->row_number = 0;
@@ -1224,7 +1221,6 @@ png_read_push_finish_row(png_structrp png_ptr)

      } while (png_ptr->iwidth == 0 || png_ptr->num_rows == 0);
   }
-#endif /* PNG_READ_INTERLACING_SUPPORTED */
 }

 void /* PRIVATE */
@@ -1249,7 +1245,6 @@ png_push_have_row(png_structrp png_ptr, png_bytep row)
         (int)png_ptr->pass);
 }

-#ifdef PNG_READ_INTERLACING_SUPPORTED
 void PNGAPI
 png_progressive_combine_row(png_const_structrp png_ptr, png_bytep old_row,
    png_const_bytep new_row)
@@ -1262,9 +1257,8 @@ png_progressive_combine_row(png_const_structrp png_ptr, png_bytep old_row,
    * it must be png_ptr->row_buf+1
    */
   if (new_row != NULL)
-      png_combine_row(png_ptr, old_row, 1/*display*/);
+      png_combine_row(png_ptr, old_row, 1/*blocky display*/);
 }
-#endif /* PNG_READ_INTERLACING_SUPPORTED */

 void PNGAPI
 png_set_progressive_read_fn(png_structrp png_ptr, png_voidp progressive_ptr,
--- a/pngpriv.h
+++ b/pngpriv.h
@@ -822,7 +822,7 @@
    * zlib version number and because this affects handling of certain broken
    * PNG files the -I directives must match.
    *
-    * The most likely explanation is that you passed a -I in CFLAGS, this will
+    * The most likely explanation is that you passed a -I in CFLAGS. This will
    * not work; all the preprocessor directories and in particular all the -I
    * directives must be in CPPFLAGS.
    */
--- a/pngread.c
+++ b/pngread.c
@@ -1,7 +1,7 @@

 /* pngread.c - read a PNG file
 *
- * Last changed in libpng 1.6.11 [(PENDING RELEASE)]
+ * Last changed in libpng 1.6.11 [June 12, 2014]
 * Copyright (c) 1998-2014 Glenn Randers-Pehrson
 * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
 * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -572,7 +572,7 @@ png_read_row(png_structrp png_ptr, png_bytep row, png_bytep dsp_row)
      png_error(png_ptr, "internal sequential row size calculation error");

 #ifdef PNG_READ_INTERLACING_SUPPORTED
-   /* Blow up interlaced rows to full size */
+   /* Expand interlaced rows to full size */
   if (png_ptr->interlaced &&
      (png_ptr->transformations & PNG_INTERLACE))
   {
--- a/pngrtran.c
+++ b/pngrtran.c
@@ -1,7 +1,7 @@

 /* pngrtran.c - transforms the data in a row for PNG readers
 *
- * Last changed in libpng 1.6.11 [(PENDING RELEASE)]
+ * Last changed in libpng 1.6.11 [June 12, 2014]
 * Copyright (c) 1998-2014 Glenn Randers-Pehrson
 * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
 * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
--- a/pngrutil.c
+++ b/pngrutil.c
@@ -1,7 +1,7 @@

 /* pngrutil.c - utilities to read a PNG file
 *
- * Last changed in libpng 1.6.11 [(PENDING RELEASE)]
+ * Last changed in libpng 1.6.11 [June 12, 2014]
 * Copyright (c) 1998-2014 Glenn Randers-Pehrson
 * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
 * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -3153,7 +3153,7 @@ png_combine_row(png_const_structrp png_ptr, png_bytep dp, int display)
 #        define S_MASKS(d,s) { S_MASK(0,d,s), S_MASK(1,d,s), S_MASK(2,d,s),\
            S_MASK(3,d,s), S_MASK(4,d,s), S_MASK(5,d,s) }

-#        define B_MASKS(d,s) { B_MASK(1,d,s), S_MASK(3,d,s), S_MASK(5,d,s) }
+#        define B_MASKS(d,s) { B_MASK(1,d,s), B_MASK(3,d,s), B_MASK(5,d,s) }

 #        define DEPTH_INDEX(d) ((d)==1?0:((d)==2?1:2))

@@ -3192,7 +3192,7 @@ png_combine_row(png_const_structrp png_ptr, png_bytep dp, int display)
 #endif /* !PNG_USE_COMPILE_TIME_MASKS */

         /* Use the appropriate mask to copy the required bits.  In some cases
-          * the byte mask will be 0 or 0xff, optimize these cases.  row_width is
+          * the byte mask will be 0 or 0xff; optimize these cases.  row_width is
          * the number of pixels, but the code copies bytes, so it is necessary
          * to special case the end.
          */
@@ -3464,7 +3464,7 @@ png_combine_row(png_const_structrp png_ptr, png_bytep dp, int display)
      /* Here if pixel_depth < 8 to check 'end_ptr' below. */
   }
   else
-#endif
+#endif /* PNG_READ_INTERLACING_SUPPORTED */

   /* If here then the switch above wasn't used so just memcpy the whole row
    * from the temporary row buffer (notice that this overwrites the end of the
@@ -4114,7 +4114,6 @@ png_read_finish_IDAT(png_structrp png_ptr)
 void /* PRIVATE */
 png_read_finish_row(png_structrp png_ptr)
 {
-#ifdef PNG_READ_INTERLACING_SUPPORTED
   /* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */

   /* Start of interlace block */
@@ -4128,14 +4127,12 @@ png_read_finish_row(png_structrp png_ptr)

   /* Offset to next interlace block in the y direction */
   static PNG_CONST png_byte png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2};
-#endif /* PNG_READ_INTERLACING_SUPPORTED */

   png_debug(1, "in png_read_finish_row");
   png_ptr->row_number++;
   if (png_ptr->row_number < png_ptr->num_rows)
      return;

-#ifdef PNG_READ_INTERLACING_SUPPORTED
   if (png_ptr->interlaced)
   {
      png_ptr->row_number = 0;
@@ -4173,7 +4170,6 @@ png_read_finish_row(png_structrp png_ptr)
      if (png_ptr->pass < 7)
         return;
   }
-#endif /* PNG_READ_INTERLACING_SUPPORTED */

   /* Here after at the end of the last row of the last pass. */
   png_read_finish_IDAT(png_ptr);
@@ -4183,7 +4179,6 @@ png_read_finish_row(png_structrp png_ptr)
 void /* PRIVATE */
 png_read_start_row(png_structrp png_ptr)
 {
-#ifdef PNG_READ_INTERLACING_SUPPORTED
   /* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */

   /* Start of interlace block */
@@ -4197,7 +4192,6 @@ png_read_start_row(png_structrp png_ptr)

   /* Offset to next interlace block in the y direction */
   static PNG_CONST png_byte png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2};
-#endif

   int max_pixel_depth;
   png_size_t row_bytes;
@@ -4207,7 +4201,6 @@ png_read_start_row(png_structrp png_ptr)
 #ifdef PNG_READ_TRANSFORMS_SUPPORTED
   png_init_read_transformations(png_ptr);
 #endif
-#ifdef PNG_READ_INTERLACING_SUPPORTED
   if (png_ptr->interlaced)
   {
      if (!(png_ptr->transformations & PNG_INTERLACE))
@@ -4224,7 +4217,6 @@ png_read_start_row(png_structrp png_ptr)
   }

   else
-#endif /* PNG_READ_INTERLACING_SUPPORTED */
   {
      png_ptr->num_rows = png_ptr->height;
      png_ptr->iwidth = png_ptr->width;
--- a/pngset.c
+++ b/pngset.c
@@ -1,7 +1,7 @@

 /* pngset.c - storage of image information into info struct
 *
- * Last changed in libpng 1.6.11 [(PENDING RELEASE)]
+ * Last changed in libpng 1.6.11 [June 12, 2014]
 * Copyright (c) 1998-2014 Glenn Randers-Pehrson
 * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
 * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
--- a/pngtest.c
+++ b/pngtest.c
@@ -1,7 +1,7 @@

 /* pngtest.c - a simple test program to test libpng
 *
- * Last changed in libpng 1.6.11 [(PENDING RELEASE)]
+ * Last changed in libpng 1.6.11 [June 12, 2014]
 * Copyright (c) 1998-2014 Glenn Randers-Pehrson
 * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
 * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -1991,4 +1991,4 @@ main(void)
 #endif

 /* Generate a compiler error if there is an old png.h in the search path. */
-typedef png_libpng_version_1_6_11beta01 Your_png_h_is_not_version_1_6_11beta01;
+typedef png_libpng_version_1_6_12 Your_png_h_is_not_version_1_6_12;
--- a/pngtrans.c
+++ b/pngtrans.c
@@ -1,7 +1,7 @@

 /* pngtrans.c - transforms the data in a row (used by both readers and writers)
 *
- * Last changed in libpng 1.6.11 [(PENDING RELEASE)]
+ * Last changed in libpng 1.6.11 [June 12, 2014]
 * Copyright (c) 1998-2014 Glenn Randers-Pehrson
 * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
 * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -327,9 +327,16 @@ png_do_swap(png_row_infop row_info, png_bytep row)

      for (i = 0; i < istop; i++, rp += 2)
      {
+#ifdef PNG_BUILTIN_BSWAP16_SUPPORTED
+         /* Feature added to libpng-1.6.11 for testing purposes, not
+          * enabled by default.
+          */
+         *(png_uint_16*)rp = __builtin_bswap16(*(png_uint_16*)rp);
+#else
         png_byte t = *rp;
         *rp = *(rp + 1);
         *(rp + 1) = t;
+#endif
      }
   }
 }
--- a/pngwrite.c
+++ b/pngwrite.c
@@ -1,7 +1,7 @@

 /* pngwrite.c - general routines to write a PNG file
 *
- * Last changed in libpng 1.6.11 [(PENDING RELEASE)]
+ * Last changed in libpng 1.6.11 [June 12, 2014]
 * Copyright (c) 1998-2014 Glenn Randers-Pehrson
 * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
 * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
--- a/pngwutil.c
+++ b/pngwutil.c
@@ -1,7 +1,7 @@

 /* pngwutil.c - utilities to write a PNG file
 *
- * Last changed in libpng 1.6.11 [(PENDING RELEASE)]
+ * Last changed in libpng 1.6.11 [June 12, 2014]
 * Copyright (c) 1998-2014 Glenn Randers-Pehrson
 * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
 * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -1193,6 +1193,7 @@ png_write_iCCP(png_structrp png_ptr, png_const_charp name,
   png_uint_32 profile_len;
   png_byte new_name[81]; /* 1 byte for the compression byte */
   compression_state comp;
+   png_uint_32 temp;

   png_debug(1, "in png_write_iCCP");

@@ -1207,7 +1208,8 @@ png_write_iCCP(png_structrp png_ptr, png_const_charp name,
   if (profile_len < 132)
      png_error(png_ptr, "ICC profile too short");

-   if (profile_len & 0x03)
+   temp = (png_uint_32) (*(profile+8));
+   if (temp > 3 && (profile_len & 0x03))
      png_error(png_ptr, "ICC profile length invalid (not a multiple of 4)");

   {
--- a/projects/vstudio/readme.txt
+++ b/projects/vstudio/readme.txt
@@ -1,7 +1,7 @@

 VisualStudio instructions

-libpng version 1.6.11beta01 - March 17, 2014
+libpng version 1.6.12 - June 12, 2014

 Copyright (c) 1998-2010 Glenn Randers-Pehrson

--- a/projects/vstudio/zlib.props
+++ b/projects/vstudio/zlib.props
@@ -2,7 +2,7 @@
 <!--
 * zlib.props - location of zlib source
 *
- * libpng version 1.6.11beta01 - March 17, 2014
+ * libpng version 1.6.12 - June 12, 2014
 *
 * Copyright (c) 1998-2011 Glenn Randers-Pehrson
 *
--- a/scripts/README.txt
+++ b/scripts/README.txt
@@ -1,9 +1,9 @@

-Makefiles for  libpng version 1.6.11beta01 - March 17, 2014
+Makefiles for  libpng version 1.6.12 - June 12, 2014

 pnglibconf.h.prebuilt       =>  Stores configuration settings
 makefile.linux    =>  Linux/ELF makefile
-                       (gcc, creates libpng16.so.16.1.6.11beta01)
+                       (gcc, creates libpng16.so.16.1.6.12)
 makefile.gcc      =>  Generic makefile (gcc, creates static libpng.a)
 makefile.knr      =>  Archaic UNIX Makefile that converts files with
                       ansi2knr (Requires ansi2knr.c from
@@ -20,7 +20,7 @@ pnglibconf.h.prebuilt       =>  Stores configuration settings
 makefile.dec      =>  DEC Alpha UNIX makefile
 makefile.dj2      =>  DJGPP 2 makefile
 makefile.elf      =>  Linux/ELF makefile symbol versioning,
-                       (gcc, creates libpng16.so.16.1.6.11beta01)
+                       (gcc, creates libpng16.so.16.1.6.12)
 makefile.freebsd  =>  FreeBSD makefile
 makefile.gcc      =>  Generic gcc makefile
 makefile.hpgcc    =>  HPUX makefile using gcc
@@ -35,12 +35,12 @@ pnglibconf.h.prebuilt       =>  Stores configuration settings
 makefile.os2      =>  OS/2 Makefile (gcc and emx, requires libpng.def)
 makefile.sco      =>  For SCO OSr5  ELF and Unixware 7 with Native cc
 makefile.sggcc    =>  Silicon Graphics (gcc,
-                       creates libpng16.so.16.1.6.11beta01)
+                       creates libpng16.so.16.1.6.12)
 makefile.sgi      =>  Silicon Graphics IRIX makefile (cc, creates static lib)
 makefile.solaris  =>  Solaris 2.X makefile (gcc,
-                       creates libpng16.so.16.1.6.11beta01)
+                       creates libpng16.so.16.1.6.12)
 makefile.so9      =>  Solaris 9 makefile (gcc,
-                       creates libpng16.so.16.1.6.11beta01)
+                       creates libpng16.so.16.1.6.12)
 makefile.std      =>  Generic UNIX makefile (cc, creates static libpng.a)
 makefile.sunos    =>  Sun makefile
 makefile.32sunu   =>  Sun Ultra 32-bit makefile
--- a/scripts/def.dfn
+++ b/scripts/def.dfn
@@ -21,7 +21,7 @@ PNG_DFN "OS2 DESCRIPTION "PNG image compression library""
 PNG_DFN "OS2 CODE PRELOAD MOVEABLE DISCARDABLE"
 PNG_DFN ""
 PNG_DFN "EXPORTS"
-PNG_DFN ";Version 1.6.11beta01"
+PNG_DFN ";Version 1.6.12"

 #define PNG_EXPORTA(ordinal, type, name, args, attributes)\
        PNG_DFN "@" SYMBOL_PREFIX "@@" name "@"
--- a/scripts/dfn.awk
+++ b/scripts/dfn.awk
--- a/scripts/libpng-config-body.in
+++ b/scripts/libpng-config-body.in
--- a/scripts/libpng-config-head.in
+++ b/scripts/libpng-config-head.in
@@ -11,7 +11,7 @@

 # Modeled after libxml-config.

-version=1.6.11beta01
+version=1.6.12
 prefix=""
 libdir=""
 libs=""
--- a/scripts/libpng.pc.in
+++ b/scripts/libpng.pc.in
@@ -5,6 +5,6 @@ includedir=@includedir@/libpng16

 Name: libpng
 Description: Loads and saves PNG files
-Version: 1.6.11beta01
+Version: 1.6.12
 Libs: -L${libdir} -lpng16
 Cflags: -I${includedir}
--- a/scripts/makefile.amiga
+++ b/scripts/makefile.amiga
@@ -24,13 +24,15 @@ LDLIBS= libpng.lib libgz.lib LIB:scm.lib LIB:sc.lib Lib:amiga.lib
 LN= slink
 # file deletion command
 RM= delete quiet
-# file copy command?
-CP= copy
 # library (.lib) file creation command
 AR= oml
 # make directory command
 MKDIR= makedir

+# Pre-built configuration
+# See scripts/pnglibconf.mak for more options
+PNGLIBCONF_H_PREBUILT = scripts/pnglibconf.h.prebuilt
+
 OBJS = png.o pngset.o pngget.o pngrutil.o pngtrans.o pngwutil.o \
 	pngread.o pngrio.o pngwio.o pngwrite.o pngrtran.o \
 	pngwtran.o pngmem.o pngerror.o pngpread.o
@@ -43,8 +45,8 @@ $(AR) libpng.lib r $(OBJS)

 $(OBJS): pngpriv.h png.h pngconf.h pnglibconf.h pnginfo.h pngstruct.h pngdebug.h

-pnglibconf.h: scripts/pnglibconf.h.prebuilt
-$(CP) scripts/pnglibconf.h.prebuilt pnglibconf.h
+pnglibconf.h: $(PNGLIBCONF_H_PREBUILT)
+COPY $(PNGLIBCONF_H_PREBUILT) TO pnglibconf.h

 pngtest: pngtest.o libpng.lib
 $(LN) <WITH <
--- a/scripts/makefile.atari
+++ b/scripts/makefile.atari
@@ -29,6 +29,10 @@ LIBPATH=$(prefix)/lib
 # you execute make install.
 DESTDIR=

+# Pre-built configuration
+# See scripts/pnglibconf.mak for more options
+PNGLIBCONF_H_PREBUILT = scripts/pnglibconf.h.prebuilt
+
 OBJS = $(LBR)(png.o) $(LBR)(pngset.o) $(LBR)(pngget.o) $(LBR)(pngrutil.o)\
 	$(LBR)(pngtrans.o) $(LBR)(pngwutil.o)\
 	$(LBR)(pngread.o) $(LBR)(pngerror.o) $(LBR)(pngwrite.o)\
@@ -44,8 +48,8 @@ $(LBR): $(OBJS)

 $(OBJS): pngpriv.h png.h pngconf.h pnglibconf.h pnginfo.h pngstruct.h pngdebug.h

-pnglibconf.h: scripts/pnglibconf.h.prebuilt
-	cp scripts/pnglibconf.h.prebuilt pnglibconf.h
+pnglibconf.h: $(PNGLIBCONF_H_PREBUILT)
+	cp $< $@

 pngtest.ttp: pngtest.o $(LBR)
 	$(CC) $(CFLAGS) $(LDFLAGS) -o$@ pngtest.o
--- a/scripts/makefile.bc32
+++ b/scripts/makefile.bc32
@@ -11,10 +11,11 @@
 ## Where zlib.h, zconf.h and zlib.lib are
 ZLIB_DIR=..\zlib

-## Compiler, linker and lib stuff
+## Compiler, linker, librarian and other tools
 CC=bcc32
 LD=bcc32
 LIB=tlib
+CP=copy

 # -3 = 386, -4 = 486, -5 = Pentium etc.
 !ifndef TARGET_CPU
@@ -49,6 +50,10 @@ CFLAGS=-O2 -d -k- -w $(TARGET_CPU) $(CDEBUG)
 # -M  generate map file
 LDFLAGS=-L$(ZLIB_DIR) -M $(LDEBUG)

+# Pre-built configuration
+# See scripts/pnglibconf.mak for more options
+PNGLIBCONF_H_PREBUILT = scripts/pnglibconf.h.prebuilt
+
 ## Variables
 OBJS = \
 	png.obj \
@@ -111,10 +116,8 @@ test: pngtest.exe

 ## Minor Targets

-# see scripts\pnglibconf.mak for how to make this file
-# with different options
-pnglibconf.h: scripts\pnglibconf.h.prebuilt
-	copy scripts\pnglibconf.h.prebuilt $@
+pnglibconf.h: $(PNGLIBCONF_H_PREBUILT)
+	$(CP) $< $@

 png.obj: png.c png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h
 pngerror.obj: pngerror.c png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h
--- a/scripts/makefile.beos
+++ b/scripts/makefile.beos
@@ -24,6 +24,7 @@ AR_RC=ar rc
 MKDIR_P=mkdir -p
 LN_SF=ln -sf
 RANLIB=ranlib
+CP=cp
 RM_F=/bin/rm -f

 # Where the zlib library and include files are located
@@ -68,6 +69,10 @@ DI=$(DESTDIR)$(INCPATH)
 DL=$(DESTDIR)$(LIBPATH)
 DM=$(DESTDIR)$(MANPATH)

+# Pre-built configuration
+# See scripts/pnglibconf.mak for more options
+PNGLIBCONF_H_PREBUILT = scripts/pnglibconf.h.prebuilt
+
 OBJS = png.o pngset.o pngget.o pngrutil.o pngtrans.o pngwutil.o \
 	pngread.o pngrio.o pngwio.o pngwrite.o pngrtran.o \
 	pngwtran.o pngmem.o pngerror.o pngpread.o
@@ -81,9 +86,8 @@ OBJSDLL = $(OBJS)

 all: libpng.a $(LIBSO) pngtest libpng.pc libpng-config

-# try include scripts/pnglibconf.mak for more options
-pnglibconf.h: scripts/pnglibconf.h.prebuilt
-	cp scripts/pnglibconf.h.prebuilt $@
+pnglibconf.h: $(PNGLIBCONF_H_PREBUILT)
+	$(CP) $< $@

 libpng.a: $(OBJS)
 	$(AR_RC) $@ $(OBJS)
--- a/scripts/makefile.bor
+++ b/scripts/makefile.bor
@@ -12,10 +12,11 @@
 ## Where zlib.h, zconf.h and zlib_MODEL.lib are
 ZLIB_DIR=..\zlib

-## Compiler, linker and lib stuff
+## Compiler, linker, librarian and other tools
 CC=bcc
 LD=bcc
 LIB=tlib
+CP=copy

 !ifndef MODEL
 MODEL=l
@@ -57,6 +58,10 @@ CFLAGS=-O2 -Z -X- -w -$(TARGET_CPU) $(MODEL_ARG) $(CDEBUG)
 # -M  generate map file
 LDFLAGS=-M -L$(ZLIB_DIR) $(MODEL_ARG) $(LDEBUG)

+# Pre-built configuration
+# See scripts/pnglibconf.mak for more options
+PNGLIBCONF_H_PREBUILT = scripts/pnglibconf.h.prebuilt
+
 ## Variables

 OBJS = \
@@ -110,9 +115,9 @@ LIBNAME=libpng$(MODEL).lib

 all: libpng pngtest

-# try !inlude scripts\pnglibconf.mak for more options
-pnglibconf.h: scripts\pnglibconf.h.prebuilt
-	copy scripts\pnglibconf.h.prebuilt $@
+# try !include scripts\pnglibconf.mak for more options
+pnglibconf.h: $(PNGLIBCONF_H_PREBUILT)
+	$(CP) $< $@

 libpng: $(LIBNAME)

--- a/scripts/makefile.cegcc
+++ b/scripts/makefile.cegcc
@@ -23,7 +23,7 @@

 VERMAJ = 1
 VERMIN = 6
-VERMIC = 11
+VERMIC = 12
 VER = $(VERMAJ).$(VERMIN).$(VERMIC)
 NAME = libpng
 PACKAGE = $(NAME)-$(VER)
--- a/scripts/makefile.darwin
+++ b/scripts/makefile.darwin
@@ -34,6 +34,7 @@ AR_RC=ar rc
 MKDIR_P=mkdir -p
 LN_SF=ln -sf
 RANLIB=ranlib
+CP=cp
 RM_F=/bin/rm -f
 ARCH=-arch ppc -arch i386 -arch x86_64

@@ -62,6 +63,10 @@ DI=$(DESTDIR)$(INCPATH)
 DL=$(DESTDIR)$(LIBPATH)
 DM=$(DESTDIR)$(MANPATH)

+# Pre-built configuration
+# See scripts/pnglibconf.mak for more options
+PNGLIBCONF_H_PREBUILT = scripts/pnglibconf.h.prebuilt
+
 OBJS = png.o pngset.o pngget.o pngrutil.o pngtrans.o pngwutil.o \
 	pngread.o pngrio.o pngwio.o pngwrite.o pngrtran.o \
 	pngwtran.o pngmem.o pngerror.o pngpread.o
@@ -78,9 +83,8 @@ OBJSDLL = $(OBJS:.o=.pic.o)

 all: libpng.a $(LIBSO) pngtest libpng.pc libpng-config

-# see scripts/pnglibconf.mak for more options
-pnglibconf.h: scripts/pnglibconf.h.prebuilt
-	cp scripts/pnglibconf.h.prebuilt $@
+pnglibconf.h: $(PNGLIBCONF_H_PREBUILT)
+	$(CP) $< $@

 libpng.a: $(OBJS)
 	$(AR_RC) $@ $(OBJS)
--- a/scripts/makefile.dec
+++ b/scripts/makefile.dec
@@ -22,6 +22,7 @@ CC=cc
 MKDIR_P=mkdir
 LN_SF=ln -f -s
 RANLIB=ranlib
+CP=cp
 RM_F=/bin/rm -f

 # where make install puts libpng.a and png.h
@@ -57,6 +58,10 @@ CPPFLAGS=-I$(ZLIBINC) # -DPNG_DEBUG=5
 CFLAGS=-std -w1 -O # -g
 LDFLAGS=-L$(ZLIBLIB) -rpath $(ZLIBLIB) libpng.a -lz -lm

+# Pre-built configuration
+# See scripts/pnglibconf.mak for more options
+PNGLIBCONF_H_PREBUILT = scripts/pnglibconf.h.prebuilt
+
 OBJS = png.o pngset.o pngget.o pngrutil.o pngtrans.o pngwutil.o \
 	pngread.o pngrio.o pngwio.o pngwrite.o pngrtran.o \
 	pngwtran.o pngmem.o pngerror.o pngpread.o
@@ -66,9 +71,8 @@ OBJS = png.o pngset.o pngget.o pngrutil.o pngtrans.o pngwutil.o \

 all: $(LIBSO) libpng.a pngtest libpng.pc libpng-config

-# see scripts/pnglibconf.mak for more options
-pnglibconf.h: scripts/pnglibconf.h.prebuilt
-	cp scripts/pnglibconf.h.prebuilt $@
+pnglibconf.h: $(PNGLIBCONF_H_PREBUILT)
+	$(CP) $< $@

 libpng.a: $(OBJS)
 	$(AR_RC) $@  $(OBJS)
@@ -181,7 +185,7 @@ test-installed:
 	./pngtesti pngtest.png

 clean:
-	/bin/rm -f *.o libpng.a pngtest pngtesti pngout.png \
+	$(RM_F) *.o libpng.a pngtest pngtesti pngout.png \
 	libpng-config $(LIBSO) $(LIBSOMAJ)* \
 	libpng.pc pnglibconf.h

--- a/scripts/makefile.dj2
+++ b/scripts/makefile.dj2
@@ -19,6 +19,13 @@ LDFLAGS=-L. -L../zlib/ -lpng -lz -lm

 RANLIB=ranlib

+CP=cp
+RM_F=rm -f
+
+# Pre-built configuration
+# See scripts/pnglibconf.mak for more options
+PNGLIBCONF_H_PREBUILT = scripts/pnglibconf.h.prebuilt
+
 OBJS = png.o pngset.o pngget.o pngrutil.o pngtrans.o pngwutil.o \
 	pngread.o pngrio.o pngwio.o pngwrite.o pngrtran.o pngwtran.o \
 	pngmem.o pngerror.o pngpread.o
@@ -28,9 +35,8 @@ OBJS = png.o pngset.o pngget.o pngrutil.o pngtrans.o pngwutil.o \

 all: libpng.a pngtest

-# see scripts/pnglibconf.mak for more options
-pnglibconf.h: scripts/pnglibconf.h.prebuilt
-	cp scripts/pnglibconf.h.prebuilt $@
+pnglibconf.h: $(PNGLIBCONF_H_PREBUILT)
+	$(CP) $< $@

 libpng.a: $(OBJS)
 	ar rc $@  $(OBJS)
@@ -43,7 +49,7 @@ pngtest: pngtest.o libpng.a
 test: pngtest
 	./pngtest
 clean:
-	rm -f *.o libpng.a pngtest pngout.png pnglibconf.h
+	$(RM_F) *.o libpng.a pngtest pngout.png pnglibconf.h

 # DO NOT DELETE THIS LINE -- make depend depends on it.

--- a/scripts/makefile.elf
+++ b/scripts/makefile.elf
@@ -30,6 +30,7 @@ CC=gcc
 MKDIR_P=mkdir -p
 LN_SF=ln -sf
 RANLIB=ranlib
+CP=cp
 RM_F=/bin/rm -f

 # where "make install" puts libpng16.a, libpng16.so*,
@@ -82,6 +83,10 @@ DI=$(DESTDIR)$(INCPATH)
 DL=$(DESTDIR)$(LIBPATH)
 DM=$(DESTDIR)$(MANPATH)

+# Pre-built configuration
+# See scripts/pnglibconf.mak for more options
+PNGLIBCONF_H_PREBUILT = scripts/pnglibconf.h.prebuilt
+
 OBJS = png.o pngset.o pngget.o pngrutil.o pngtrans.o pngwutil.o \
 	pngread.o pngrio.o pngwio.o pngwrite.o pngrtran.o \
 	pngwtran.o pngmem.o pngerror.o pngpread.o
@@ -98,9 +103,8 @@ OBJSDLL = $(OBJS:.o=.pic.o)

 all: libpng.a $(LIBSO) pngtest pngtest-static libpng.pc libpng-config

-# see scripts/pnglibconf.mak for more options
-pnglibconf.h: scripts/pnglibconf.h.prebuilt
-	cp scripts/pnglibconf.h.prebuilt $@
+pnglibconf.h: $(PNGLIBCONF_H_PREBUILT)
+	$(CP) $< $@

 libpng.a: $(OBJS)
 	$(AR_RC) $@ $(OBJS)
--- a/scripts/makefile.freebsd
+++ b/scripts/makefile.freebsd
@@ -13,7 +13,7 @@ LIB=		png
 SHLIB_MAJOR=	${SHLIB_VER}
 SHLIB_MINOR=	0
 NO_PROFILE=	YES
-NO_OBJ=          YES
+NO_OBJ=		YES

 # where make install puts libpng.a and png.h
 DESTDIR=	${PREFIX}
@@ -39,6 +39,10 @@ DPADD+=		${LIBM} ${LIBZ}
 CPPFLAGS+=	-I. -I${ZLIBINC}
 CFLAGS+=	-W -Wall

+# Pre-built configuration
+# See scripts/pnglibconf.mak for more options
+PNGLIBCONF_H_PREBUILT= scripts/pnglibconf.h.prebuilt
+
 SRCS=	png.c pngset.c pngget.c pngrutil.c pngtrans.c pngwutil.c \
 	pngread.c pngrio.c pngwio.c pngwrite.c pngrtran.c \
 	pngwtran.c pngmem.c pngerror.c pngpread.c
@@ -55,9 +59,8 @@ CLEANFILES= pngtest pngtest.o pngout.png
 test: pngtest
 	./pngtest

-# see scripts/pnglibconf.mak for more options
-pnglibconf.h: scripts/pnglibconf.h.prebuilt
-	cp scripts/pnglibconf.h.prebuilt $@
+pnglibconf.h: $(PNGLIBCONF_H_PREBUILT)
+	cp $< $@

 DOCS = ANNOUNCE CHANGES INSTALL KNOWNBUG LICENSE README TODO Y2KINFO
 writelock:
--- a/scripts/makefile.gcc
+++ b/scripts/makefile.gcc
@@ -16,6 +16,7 @@ CC = gcc
 LD = $(CC)
 AR_RC = ar rcs
 RANLIB = ranlib
+CP = cp
 RM_F = rm -f

 WARNMORE = -Wwrite-strings -Wpointer-arith -Wshadow \
@@ -29,6 +30,10 @@ LIBS = -lz -lm
 # File extensions
 EXEEXT =

+# Pre-built configuration
+# See scripts/pnglibconf.mak for more options
+PNGLIBCONF_H_PREBUILT = scripts/pnglibconf.h.prebuilt
+
 # Variables
 OBJS =  png.o pngerror.o pngget.o pngmem.o pngpread.o \
 	pngread.o pngrio.o pngrtran.o pngrutil.o pngset.o \
@@ -37,9 +42,8 @@ OBJS =  png.o pngerror.o pngget.o pngmem.o pngpread.o \
 # Targets
 all: static

-# see scripts/pnglibconf.mak for more options
-pnglibconf.h: scripts/pnglibconf.h.prebuilt
-	cp scripts/pnglibconf.h.prebuilt $@
+pnglibconf.h: $(PNGLIBCONF_H_PREBUILT)
+	$(CP) $< $@

 .c.o:
 	$(CC) -c $(CPPFLAGS) $(CFLAGS) -o $@ $<
--- a/scripts/makefile.hp64
+++ b/scripts/makefile.hp64
@@ -34,6 +34,7 @@ CC=cc
 MKDIR_P=mkdir -p
 LN_SF=ln -sf
 RANLIB=ranlib
+CP=cp
 RM_F=/bin/rm -f

 CPPFLAGS=-I$(ZLIBINC) \
@@ -67,6 +68,10 @@ DI=$(DESTDIR)$(INCPATH)
 DL=$(DESTDIR)$(LIBPATH)
 DM=$(DESTDIR)$(MANPATH)

+# Pre-built configuration
+# See scripts/pnglibconf.mak for more options
+PNGLIBCONF_H_PREBUILT = scripts/pnglibconf.h.prebuilt
+
 OBJS = png.o pngset.o pngget.o pngrutil.o pngtrans.o pngwutil.o \
 	pngread.o pngrio.o pngwio.o pngwrite.o pngrtran.o \
 	pngwtran.o pngmem.o pngerror.o pngpread.o
@@ -83,9 +88,8 @@ OBJSDLL = $(OBJS:.o=.pic.o)

 all: libpng.a $(LIBSO) pngtest libpng.pc libpng-config

-# see scripts/pnglibconf.mak for more options
-pnglibconf.h: scripts/pnglibconf.h.prebuilt
-	cp scripts/pnglibconf.h.prebuilt $@
+pnglibconf.h: $(PNGLIBCONF_H_PREBUILT)
+	$(CP) $< $@

 libpng.a: $(OBJS)
 	$(AR_RC) $@ $(OBJS)
--- a/scripts/makefile.hpgcc
+++ b/scripts/makefile.hpgcc
@@ -25,6 +25,7 @@ AR_RC=ar rc
 MKDIR_P=mkdir -p
 LN_SF=ln -sf
 RANLIB=ranlib
+CP=cp
 RM_F=/bin/rm -f

 # where "make install" puts libpng.a, $(OLDSO)*, png.h, pngconf.h
--- a/scripts/makefile.hpux
+++ b/scripts/makefile.hpux
@@ -66,6 +66,10 @@ DI=$(DESTDIR)$(INCPATH)
 DL=$(DESTDIR)$(LIBPATH)
 DM=$(DESTDIR)$(MANPATH)

+# Pre-built configuration
+# See scripts/pnglibconf.mak for more options
+PNGLIBCONF_H_PREBUILT = scripts/pnglibconf.h.prebuilt
+
 OBJS = png.o pngset.o pngget.o pngrutil.o pngtrans.o pngwutil.o \
 	pngread.o pngrio.o pngwio.o pngwrite.o pngrtran.o \
 	pngwtran.o pngmem.o pngerror.o pngpread.o
@@ -82,9 +86,8 @@ OBJSDLL = $(OBJS:.o=.pic.o)

 all: libpng.a $(LIBSO) pngtest libpng.pc libpng-config

-# see scripts/pnglibconf.mak for more options
-pnglibconf.h: scripts/pnglibconf.h.prebuilt
-	cp scripts/pnglibconf.h.prebuilt $@
+pnglibconf.h: $(PNGLIBCONF_H_PREBUILT)
+	$(CP) $< $@

 libpng.a: $(OBJS)
 	$(AR_RC) $@ $(OBJS)
--- a/scripts/makefile.ibmc
+++ b/scripts/makefile.ibmc
@@ -21,12 +21,17 @@ ZLIBLIB = ../zlib
 CC = icc
 LD = ilink
 AR = ilib
+CP = copy
 RM = del

 CPPFLAGS = -I$(ZLIBINC)
 CFLAGS = -Mc -O2 -W3
 LDFLAGS =

+# Pre-built configuration
+# See scripts/pnglibconf.mak for more options
+PNGLIBCONF_H_PREBUILT = scripts/pnglibconf.h.prebuilt
+
 # File extensions
 O=.obj
 A=.lib
@@ -45,9 +50,8 @@ LIBS = libpng$(A) $(ZLIBLIB)/zlib$(A)

 all: libpng$(A) pngtest$(E)

-# see scripts/pnglibconf.mak for more options
-pnglibconf.h: scripts/pnglibconf.h.prebuilt
-	cp scripts/pnglibconf.h.prebuilt $@
+pnglibconf.h: $(PNGLIBCONF_H_PREBUILT)
+	$(CP) $< $@

 libpng$(A): $(OBJS)
 	$(AR) -out:$@ $(OBJS)
--- a/scripts/makefile.intel
+++ b/scripts/makefile.intel
@@ -36,6 +36,11 @@ CPPFLAGS=-I$(ZLIBINC)
 CFLAGS=-O2 -G$(CPU)$(CALLING) -Qip -Qunroll4 -nologo
 LD=link
 LDFLAGS=/SUBSYSTEM:CONSOLE /NOLOGO
+CP=cp
+
+# Pre-built configuration
+# See scripts/pnglibconf.mak for more options
+PNGLIBCONF_H_PREBUILT = scripts/pnglibconf.h.prebuilt

 O=.obj

@@ -45,9 +50,8 @@ pngrtran$(O) pngwtran$(O) pngrio$(O) pngwio$(O)

 all: test

-# see scripts/pnglibconf.mak for more options
-pnglibconf.h: scripts/pnglibconf.h.prebuilt
-	cp scripts/pnglibconf.h.prebuilt $@
+pnglibconf.h: $(PNGLIBCONF_H_PREBUILT)
+	$(CP) $< $@

 png$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h
 	$(CC) $(CPPFLAGS) $(CFLAGS) $*.c $(ERRFILE)
--- a/scripts/makefile.knr
+++ b/scripts/makefile.knr
@@ -36,15 +36,21 @@ ANSI2KNRFLAGS=
 RANLIB = ranlib
 #RANLIB = echo

+CP = cp
+RM_F = rm -f
+
+# Pre-built configuration
+# See scripts/pnglibconf.mak for more options
+PNGLIBCONF_H_PREBUILT = scripts/pnglibconf.h.prebuilt
+
 OBJS = png.o pngset.o pngget.o pngrutil.o pngtrans.o pngwutil.o \
 	pngread.o pngrio.o pngwio.o pngwrite.o pngrtran.o \
 	pngwtran.o pngmem.o pngerror.o pngpread.o

 all: ansi2knr libpng.a pngtest

-# see scripts/pnglibconf.mak for more options
-pnglibconf.h: scripts/pnglibconf.h.prebuilt
-	cp scripts/pnglibconf.h.prebuilt $@
+pnglibconf.h: $(PNGLIBCONF_H_PREBUILT)
+	$(CP) $< $@

 # general rule to allow ansi2knr to work
 .c.o:
@@ -83,7 +89,7 @@ install: libpng.a png.h pngconf.h pnglibconf.h
 	chmod 644 $(DESTDIR)$(LIBPATH)/libpng.a

 clean:
-	rm -f *.o libpng.a pngtest pngout.png ansi2knr pnglibconf.h
+	$(RM_F) *.o libpng.a pngtest pngout.png ansi2knr pnglibconf.h

 DOCS = ANNOUNCE CHANGES INSTALL KNOWNBUG LICENSE README TODO Y2KINFO
 writelock:
--- a/scripts/makefile.linux
+++ b/scripts/makefile.linux
@@ -10,7 +10,7 @@
 # Library name:
 LIBNAME = libpng16
 PNGMAJ = 16
-RELEASE = 11
+RELEASE = 12

 # Shared library names:
 LIBSO=$(LIBNAME).so
@@ -24,6 +24,7 @@ CC=gcc
 MKDIR_P=mkdir -p
 LN_SF=ln -sf
 RANLIB=ranlib
+CP=cp
 RM_F=/bin/rm -f

 # where "make install" puts libpng16.a, libpng16.so*,
@@ -75,6 +76,10 @@ DI=$(DESTDIR)$(INCPATH)
 DL=$(DESTDIR)$(LIBPATH)
 DM=$(DESTDIR)$(MANPATH)

+# Pre-built configuration
+# See scripts/pnglibconf.mak for more options
+PNGLIBCONF_H_PREBUILT = scripts/pnglibconf.h.prebuilt
+
 OBJS =  png.o pngset.o pngget.o pngrutil.o pngtrans.o pngwutil.o \
 	pngread.o pngrio.o pngwio.o pngwrite.o pngrtran.o \
 	pngwtran.o pngmem.o pngerror.o pngpread.o
@@ -91,9 +96,8 @@ OBJSDLL = $(OBJS:.o=.pic.o)

 all: libpng.a $(LIBSO) pngtest pngtest-static libpng.pc libpng-config

-# see scripts/pnglibconf.mak for more options
-pnglibconf.h: scripts/pnglibconf.h.prebuilt
-	cp scripts/pnglibconf.h.prebuilt $@
+pnglibconf.h: $(PNGLIBCONF_H_PREBUILT)
+	$(CP) $< $@

 libpng.a: $(OBJS)
 	$(AR_RC) $@ $(OBJS)
--- a/scripts/makefile.mips
+++ b/scripts/makefile.mips
@@ -30,6 +30,12 @@ LDFLAGS=-L. -L../zlib/ -lpng -lz -lm
 #RANLIB=ranlib
 RANLIB=echo

+CP=cp
+
+# Pre-built configuration
+# See scripts/pnglibconf.mak for more options
+PNGLIBCONF_H_PREBUILT = scripts/pnglibconf.h.prebuilt
+
 OBJS = png.o pngset.o pngget.o pngrutil.o pngtrans.o pngwutil.o \
 	pngread.o pngrio.o pngwio.o pngwrite.o pngrtran.o \
 	pngwtran.o pngmem.o pngerror.o pngpread.o
@@ -39,9 +45,8 @@ OBJS = png.o pngset.o pngget.o pngrutil.o pngtrans.o pngwutil.o \

 all: libpng.a pngtest

-# see scripts/pnglibconf.mak for more options
-pnglibconf.h: scripts/pnglibconf.h.prebuilt
-	cp scripts/pnglibconf.h.prebuilt $@
+pnglibconf.h: $(PNGLIBCONF_H_PREBUILT)
+	$(CP) $< $@

 libpng.a: $(OBJS)
 	ar rc $@  $(OBJS)
--- a/scripts/makefile.msc
+++ b/scripts/makefile.msc
@@ -16,8 +16,13 @@ CFLAGS=-Oait -Gs -nologo -W3 -A$(MODEL)
 CC=cl
 LD=link
 LDFLAGS=/e/st:0x1500/noe
+CP=copy
 O=.obj

+# Pre-built configuration
+# See scripts/pnglibconf.mak for more options
+PNGLIBCONF_H_PREBUILT = scripts/pnglibconf.h.prebuilt
+
 #uncomment next to put error messages in a file
 ERRFILE= >> pngerrs

@@ -28,12 +33,11 @@ OBJS3 = pngrtran$(O) pngwtran$(O) pngrio$(O) pngwio$(O)

 all: libpng.lib

-# see scripts/pnglibconf.mak for more options
-pnglibconf.h: scripts/pnglibconf.h.prebuilt
-	cp scripts/pnglibconf.h.prebuilt $@
+pnglibconf.h: $(PNGLIBCONF_H_PREBUILT)
+	$(CP) $< $@

 png$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h
-		  $(CC) -c $(CPPFLAGS) $(CFLAGS) $*.c $(ERRFILE)
+	$(CC) -c $(CPPFLAGS) $(CFLAGS) $*.c $(ERRFILE)

 pngset$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h
 	$(CC) -c $(CPPFLAGS) $(CFLAGS) $*.c $(ERRFILE)
--- a/scripts/makefile.msys
+++ b/scripts/makefile.msys
@@ -18,7 +18,7 @@ exec_prefix=$(prefix)
 # Library name:
 LIBNAME = libpng16
 PNGMAJ = 16
-RELEASE = 11
+RELEASE = 12

 # Shared library names:
 LIBSO=$(LIBNAME).dll
@@ -37,6 +37,7 @@ CC = gcc
 LD = $(CC)
 AR_RC = ar rcs
 RANLIB = ranlib
+CP = cp
 RM_F = rm -rf
 MKDIR_P=mkdir -p
 LN_SF=ln -sf
@@ -73,6 +74,10 @@ DI=$(DESTDIR)$(INCPATH)
 DL=$(DESTDIR)$(LIBPATH)
 DM=$(DESTDIR)$(MANPATH)

+# Pre-built configuration
+# See scripts/pnglibconf.mak for more options
+PNGLIBCONF_H_PREBUILT = scripts/pnglibconf.h.prebuilt
+
 # Variables
 OBJS =  png.o pngerror.o pngget.o pngmem.o pngpread.o \
 	pngread.o pngrio.o pngrtran.o pngrutil.o pngset.o \
@@ -81,9 +86,8 @@ OBJS =  png.o pngerror.o pngget.o pngmem.o pngpread.o \
 # Targets
 all: static shared

-# see scripts/pnglibconf.mak for more options
-pnglibconf.h: scripts/pnglibconf.h.prebuilt
-	cp scripts/pnglibconf.h.prebuilt $@
+pnglibconf.h: $(PNGLIBCONF_H_PREBUILT)
+	$(CP) $< $@

 .c.o:
 	$(CC) -c $(CPPFLAGS) $(CFLAGS) $<
--- a/scripts/makefile.ne12bsd
+++ b/scripts/makefile.ne12bsd
@@ -17,7 +17,7 @@ INCSDIR=${LOCALBASE}/include/libpng16

 LIB=	png16
 SHLIB_MAJOR=	0
-SHLIB_MINOR=	1.6.11beta01
+SHLIB_MINOR=	1.6.12
 SRCS=	png.c pngset.c pngget.c pngrutil.c pngtrans.c pngwutil.c \
 	pngread.c pngrio.c pngwio.c pngwrite.c pngrtran.c \
 	pngwtran.c pngmem.c pngerror.c pngpread.c
@@ -26,6 +26,10 @@ MAN=	libpng.3 libpngpf.3 png.5

 CPPFLAGS+=-I${.CURDIR}

+# Pre-built configuration
+# See scripts/pnglibconf.mak for more options
+PNGLIBCONF_H_PREBUILT= scripts/pnglibconf.h.prebuilt
+
 # We should be able to do something like this instead of the manual
 # uncommenting, but it core dumps for me at the moment:
 # .if ${MACHINE_ARCH} == "i386"
@@ -37,9 +41,8 @@ CLEANFILES+=pngtest.o pngtest pnglibconf.h
 .c.o:
 	$(CC) -c $(CPPFLAGS) $(CFLAGS) -o $@ $<

-# see scripts/pnglibconf.mak for more options
-pnglibconf.h: scripts/pnglibconf.h.prebuilt
-	cp scripts/pnglibconf.h.prebuilt $@
+pnglibconf.h: $(PNGLIBCONF_H_PREBUILT)
+	cp $< $@

 pngtest.o:	pngtest.c
 	${CC} -c ${CPPFLAGS} ${CFLAGS} ${.ALLSRC} -o ${.TARGET}
--- a/scripts/makefile.netbsd
+++ b/scripts/makefile.netbsd
@@ -17,7 +17,7 @@ INCSDIR=${LOCALBASE}/include

 LIB=	png
 SHLIB_MAJOR=	16
-SHLIB_MINOR=	1.6.11beta01
+SHLIB_MINOR=	1.6.12
 SRCS=	png.c pngset.c pngget.c pngrutil.c pngtrans.c pngwutil.c \
 	pngread.c pngrio.c pngwio.c pngwrite.c pngrtran.c \
 	pngwtran.c pngmem.c pngerror.c pngpread.c
@@ -26,6 +26,10 @@ MAN=	libpng.3 libpngpf.3 png.5

 CPPFLAGS+=-I${.CURDIR}

+# Pre-built configuration
+# See scripts/pnglibconf.mak for more options
+PNGLIBCONF_H_PREBUILT= scripts/pnglibconf.h.prebuilt
+
 # We should be able to do something like this instead of the manual
 # uncommenting, but it core dumps for me at the moment:
 # .if ${MACHINE_ARCH} == "i386"
@@ -37,9 +41,8 @@ CLEANFILES+=pngtest.o pngtest pnglibconf.h
 .c.o:
 	$(CC) -c $(CPPFLAGS) $(CFLAGS) -o $@ $<

-# see scripts/pnglibconf.mak for more options
-pnglibconf.h: scripts/pnglibconf.h.prebuilt
-	cp scripts/pnglibconf.h.prebuilt $@
+pnglibconf.h: $(PNGLIBCONF_H_PREBUILT)
+	cp $< $@

 pngtest.o:	pngtest.c
 	${CC} -c ${CPPFLAGS} ${CFLAGS} ${.ALLSRC} -o ${.TARGET}
--- a/scripts/makefile.openbsd
+++ b/scripts/makefile.openbsd
@@ -11,7 +11,7 @@ LIBDIR=	${PREFIX}/lib
 MANDIR= ${PREFIX}/man/cat

 SHLIB_MAJOR=	16
-SHLIB_MINOR=	1.6.11beta01
+SHLIB_MINOR=	1.6.12

 LIB=	png
 SRCS=	png.c pngerror.c pngget.c pngmem.c pngpread.c \
@@ -31,12 +31,15 @@ MAN=	libpng.3 libpngpf.3 png.5
 DOCS=	ANNOUNCE CHANGES INSTALL KNOWNBUG LICENSE README TODO Y2KINFO \
 	libpng-manual.txt

+# Pre-built configuration
+# See scripts/pnglibconf.mak for more options
+PNGLIBCONF_H_PREBUILT= scripts/pnglibconf.h.prebuilt
+
 .c.o:
 	$(CC) -c $(CPPFLAGS) $(CFLAGS) -o $@ $<

-# see scripts/pnglibconf.mak for more options
-pnglibconf.h: scripts/pnglibconf.h.prebuilt
-	cp scripts/pnglibconf.h.prebuilt $@
+pnglibconf.h: $(PNGLIBCONF_H_PREBUILT)
+	cp $< $@

 pngtest.o:	pngtest.c
 	${CC} ${CPPFLAGS} ${CFLAGS} -c ${.ALLSRC} -o ${.TARGET}
--- a/scripts/makefile.sco
+++ b/scripts/makefile.sco
@@ -25,6 +25,7 @@ AR_RC=ar rc
 MKDIR_P=mkdir
 LN_SF=ln -f -s
 RANLIB=echo
+CP=cp
 RM_F=/bin/rm -f

 # where make install puts libpng.a, $(OLDSO)*, and png.h
@@ -61,6 +62,10 @@ DI=$(DESTDIR)$(INCPATH)
 DL=$(DESTDIR)$(LIBPATH)
 DM=$(DESTDIR)$(MANPATH)

+# Pre-built configuration
+# See scripts/pnglibconf.mak for more options
+PNGLIBCONF_H_PREBUILT = scripts/pnglibconf.h.prebuilt
+
 OBJS = png.o pngset.o pngget.o pngrutil.o pngtrans.o pngwutil.o \
 	pngread.o pngrio.o pngwio.o pngwrite.o pngrtran.o \
 	pngwtran.o pngmem.o pngerror.o pngpread.o
@@ -77,9 +82,8 @@ OBJSDLL = $(OBJS:.o=.pic.o)

 all: libpng.a $(LIBSO) pngtest libpng.pc libpng-config

-# see scripts/pnglibconf.mak for more options
-pnglibconf.h: scripts/pnglibconf.h.prebuilt
-	cp scripts/pnglibconf.h.prebuilt $@
+pnglibconf.h: $(PNGLIBCONF_H_PREBUILT)
+	$(CP) $< $@

 libpng.a: $(OBJS)
 	$(AR_RC) $@ $(OBJS)
--- a/scripts/makefile.sggcc
+++ b/scripts/makefile.sggcc
@@ -22,6 +22,7 @@ CC=gcc
 MKDIR_P=mkdir -p
 LN_SF=ln -sf
 RANLIB=echo
+CP=cp
 RM_F=/bin/rm -f

 # Where make install puts libpng.a, libpng16.so, and libpng16/png.h
@@ -71,6 +72,10 @@ DI=$(DESTDIR)$(INCPATH)
 DL=$(DESTDIR)$(LIBPATH)
 DM=$(DESTDIR)$(MANPATH)

+# Pre-built configuration
+# See scripts/pnglibconf.mak for more options
+PNGLIBCONF_H_PREBUILT = scripts/pnglibconf.h.prebuilt
+
 OBJS =  png.o pngset.o pngget.o pngrutil.o pngtrans.o pngwutil.o \
 	pngread.o pngrio.o pngwio.o pngwrite.o pngrtran.o \
 	pngwtran.o pngmem.o pngerror.o pngpread.o
@@ -80,9 +85,8 @@ OBJS =  png.o pngset.o pngget.o pngrutil.o pngtrans.o pngwutil.o \

 all: libpng.a pngtest shared libpng.pc libpng-config

-# see scripts/pnglibconf.mak for more options
-pnglibconf.h: scripts/pnglibconf.h.prebuilt
-	cp scripts/pnglibconf.h.prebuilt $@
+pnglibconf.h: $(PNGLIBCONF_H_PREBUILT)
+	$(CP) $< $@

 libpng.a: $(OBJS)
 	$(AR_RC) $@ $(OBJS)
--- a/scripts/makefile.sgi
+++ b/scripts/makefile.sgi
@@ -22,6 +22,7 @@ CC=cc
 MKDIR_P=mkdir -p
 LN_SF=ln -sf
 RANLIB=echo
+CP=cp
 RM_F=/bin/rm -f

 # Where make install puts libpng.a, libpng16.so, and libpng16/png.h
@@ -74,6 +75,10 @@ DI=$(DESTDIR)$(INCPATH)
 DL=$(DESTDIR)$(LIBPATH)
 DM=$(DESTDIR)$(MANPATH)

+# Pre-built configuration
+# See scripts/pnglibconf.mak for more options
+PNGLIBCONF_H_PREBUILT = scripts/pnglibconf.h.prebuilt
+
 OBJS =  png.o pngset.o pngget.o pngrutil.o pngtrans.o pngwutil.o \
 	pngread.o pngrio.o pngwio.o pngwrite.o pngrtran.o \
 	pngwtran.o pngmem.o pngerror.o pngpread.o
@@ -83,9 +88,8 @@ OBJS =  png.o pngset.o pngget.o pngrutil.o pngtrans.o pngwutil.o \

 all: libpng.a pngtest shared libpng.pc libpng-config

-# see scripts/pnglibconf.mak for more options
-pnglibconf.h: scripts/pnglibconf.h.prebuilt
-	cp scripts/pnglibconf.h.prebuilt $@
+pnglibconf.h: $(PNGLIBCONF_H_PREBUILT)
+	$(CP) $< $@

 libpng.a: $(OBJS)
 	$(AR_RC) $@ $(OBJS)
--- a/scripts/makefile.so9
+++ b/scripts/makefile.so9
@@ -26,6 +26,7 @@ AR_RC=ar rc
 MKDIR_P=mkdir -p
 LN_SF=ln -f -s
 RANLIB=echo
+CP=cp
 RM_F=/bin/rm -f

 # Where make install puts libpng.a, $(OLDSO)*, and png.h
@@ -71,6 +72,10 @@ DI=$(DESTDIR)$(INCPATH)
 DL=$(DESTDIR)$(LIBPATH)
 DM=$(DESTDIR)$(MANPATH)

+# Pre-built configuration
+# See scripts/pnglibconf.mak for more options
+PNGLIBCONF_H_PREBUILT = scripts/pnglibconf.h.prebuilt
+
 OBJS = png.o pngset.o pngget.o pngrutil.o pngtrans.o pngwutil.o \
 	pngread.o pngrio.o pngwio.o pngwrite.o pngrtran.o \
 	pngwtran.o pngmem.o pngerror.o pngpread.o
@@ -87,9 +92,8 @@ OBJSDLL = $(OBJS:.o=.pic.o)

 all: libpng.a $(LIBSO) pngtest libpng.pc libpng-config

-# see scripts/pnglibconf.mak for more options
-pnglibconf.h: scripts/pnglibconf.h.prebuilt
-	cp scripts/pnglibconf.h.prebuilt $@
+pnglibconf.h: $(PNGLIBCONF_H_PREBUILT)
+	$(CP) $< $@

 libpng.a: $(OBJS)
 	$(AR_RC) $@ $(OBJS)
--- a/scripts/makefile.solaris
+++ b/scripts/makefile.solaris
@@ -24,6 +24,7 @@ CC=gcc
 MKDIR_P=mkdir -p
 LN_SF=ln -f -s
 RANLIB=echo
+CP=cp
 RM_F=/bin/rm -f

 # Where make install puts libpng.a, libpng16.so*, and png.h
@@ -67,6 +68,10 @@ DI=$(DESTDIR)$(INCPATH)
 DL=$(DESTDIR)$(LIBPATH)
 DM=$(DESTDIR)$(MANPATH)

+# Pre-built configuration
+# See scripts/pnglibconf.mak for more options
+PNGLIBCONF_H_PREBUILT = scripts/pnglibconf.h.prebuilt
+
 OBJS = png.o pngset.o pngget.o pngrutil.o pngtrans.o pngwutil.o \
 	pngread.o pngrio.o pngwio.o pngwrite.o pngrtran.o \
 	pngwtran.o pngmem.o pngerror.o pngpread.o
@@ -83,9 +88,8 @@ OBJSDLL = $(OBJS:.o=.pic.o)

 all: libpng.a $(LIBSO) pngtest libpng.pc libpng-config

-# see scripts/pnglibconf.mak for more options
-pnglibconf.h: scripts/pnglibconf.h.prebuilt
-	cp scripts/pnglibconf.h.prebuilt $@
+pnglibconf.h: $(PNGLIBCONF_H_PREBUILT)
+	$(CP) $< $@

 libpng.a: $(OBJS)
 	$(AR_RC) $@ $(OBJS)
--- a/scripts/makefile.solaris-x86
+++ b/scripts/makefile.solaris-x86
@@ -24,6 +24,7 @@ CC=gcc
 MKDIR_P=mkdir -p
 LN_SF=ln -f -s
 RANLIB=echo
+CP=cp
 RM_F=/bin/rm -f

 # Where make install puts libpng.a, libpng16.so*, and png.h
@@ -66,6 +67,10 @@ DI=$(DESTDIR)$(INCPATH)
 DL=$(DESTDIR)$(LIBPATH)
 DM=$(DESTDIR)$(MANPATH)

+# Pre-built configuration
+# See scripts/pnglibconf.mak for more options
+PNGLIBCONF_H_PREBUILT = scripts/pnglibconf.h.prebuilt
+
 OBJS = png.o pngset.o pngget.o pngrutil.o pngtrans.o pngwutil.o \
 	pngread.o pngrio.o pngwio.o pngwrite.o pngrtran.o \
 	pngwtran.o pngmem.o pngerror.o pngpread.o
@@ -82,9 +87,8 @@ OBJSDLL = $(OBJS:.o=.pic.o)

 all: libpng.a $(LIBSO) pngtest libpng.pc libpng-config

-# see scripts/pnglibconf.mak for more options
-pnglibconf.h: scripts/pnglibconf.h.prebuilt
-	cp scripts/pnglibconf.h.prebuilt $@
+pnglibconf.h: $(PNGLIBCONF_H_PREBUILT)
+	$(CP) $< $@

 libpng.a: $(OBJS)
 	$(AR_RC) $@ $(OBJS)
--- a/scripts/makefile.std
+++ b/scripts/makefile.std
@@ -32,6 +32,7 @@ AR_RC = ar rc
 MKDIR_P = mkdir
 LN_SF = ln -sf
 RANLIB = ranlib
+CP = cp
 RM_F = rm -f
 AWK = awk
 SED = sed
@@ -44,6 +45,10 @@ CPPFLAGS = -I$(ZLIBINC) # -DPNG_DEBUG=5
 CFLAGS = -O # -g
 LDFLAGS = -L. -L$(ZLIBLIB) -lpng -lz -lm

+# Pre-built configuration
+# See scripts/pnglibconf.mak for more options
+PNGLIBCONF_H_PREBUILT = scripts/pnglibconf.h.prebuilt
+
 OBJS = png.o pngset.o pngget.o pngrutil.o pngtrans.o pngwutil.o \
 	pngread.o pngrio.o pngwio.o pngwrite.o pngrtran.o \
 	pngwtran.o pngmem.o pngerror.o pngpread.o
--- a/scripts/makefile.sunos
+++ b/scripts/makefile.sunos
@@ -37,12 +37,17 @@ AR_RC=ar rc
 MKDIR_P=mkdir -p
 LN_SF=ln -f -s
 RANLIB=ranlib
+CP=cp
 RM_F=/bin/rm -f

 CPPFLAGS=-I$(ZLIBINC) # -DPNG_DEBUG=5
 CFLAGS=-O # $(WARNMORE)
 LDFLAGS=-L. -L$(ZLIBLIB) -lpng -lz -lm

+# Pre-built configuration
+# See scripts/pnglibconf.mak for more options
+PNGLIBCONF_H_PREBUILT = scripts/pnglibconf.h.prebuilt
+
 OBJS = png.o pngset.o pngget.o pngrutil.o pngtrans.o pngwutil.o \
 	pngread.o pngrio.o pngwio.o pngwrite.o pngrtran.o \
 	pngwtran.o pngmem.o pngerror.o pngpread.o
@@ -52,9 +57,8 @@ OBJS = png.o pngset.o pngget.o pngrutil.o pngtrans.o pngwutil.o \

 all: libpng.a pngtest

-# see scripts/pnglibconf.mak for more options
-pnglibconf.h: scripts/pnglibconf.h.prebuilt
-	cp scripts/pnglibconf.h.prebuilt $@
+pnglibconf.h: $(PNGLIBCONF_H_PREBUILT)
+	$(CP) $< $@

 libpng.a: $(OBJS)
 	$(AR_RC) $@  $(OBJS)
--- a/scripts/makefile.tc3
+++ b/scripts/makefile.tc3
@@ -12,6 +12,12 @@ CC=tcc
 LD=tcc
 LIB=tlib
 LDFLAGS=-m$(MODEL) -L..\zlib
+CP=copy
+
+# Pre-built configuration
+# See scripts/pnglibconf.mak for more options
+PNGLIBCONF_H_PREBUILT = scripts/pnglibconf.h.prebuilt
+
 O=.obj
 E=.exe

@@ -25,9 +31,8 @@ OBJSL3 = +pngwrite$(O) +pngrtran$(O) +pngwtran$(O) +pngrio$(O) +pngwio$(O)

 all: libpng$(MODEL).lib pngtest$(E)

-# see scripts/pnglibconf.mak for more options
-pnglibconf.h: scripts/pnglibconf.h.prebuilt
-	cp scripts/pnglibconf.h.prebuilt $@
+pnglibconf.h: $(PNGLIBCONF_H_PREBUILT)
+	$(CP) $< $@

 pngtest: pngtest$(E)

--- a/scripts/makefile.vcwin32
+++ b/scripts/makefile.vcwin32
@@ -9,9 +9,9 @@
 # Assumes that zlib.lib, zconf.h, and zlib.h have been copied to ..\zlib
 # To use, do "nmake /f scripts\makefile.vcwin32"

-# -------- Microsoft Visual C++ 2.0 and later, no assembler code --------
+# -------- Microsoft Visual C++ 2.0 and later --------

-# Compiler, linker, librarian, and other tools
+# Compiler, linker, librarian and other tools
 CC = cl
 LD = link
 AR = lib
@@ -19,8 +19,13 @@ CPPFLAGS = -I..\zlib
 CFLAGS  = -nologo -D_CRT_SECURE_NO_DEPRECATE -MD -O2 -W3
 LDFLAGS = -nologo
 ARFLAGS = -nologo
+CP = copy
 RM = del

+# Pre-built configuration
+# See scripts/pnglibconf.mak for more options
+PNGLIBCONF_H_PREBUILT = scripts/pnglibconf.h.prebuilt
+
 # File extensions
 O=.obj

@@ -36,9 +41,8 @@ OBJS  = $(OBJS1) $(OBJS2) $(OBJS3)
 # Targets
 all: libpng.lib

-# see scripts/pnglibconf.mak for more options
-pnglibconf.h: scripts\pnglibconf.h.prebuilt
-       copy scripts\pnglibconf.h.prebuilt $@
+pnglibconf.h: $(PNGLIBCONF_H_PREBUILT)
+       $(CP) $< $@

 png$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h
 	$(CC) -c $(CPPFLAGS) $(CFLAGS) $*.c $(ERRFILE)
--- a/scripts/options.awk
+++ b/scripts/options.awk
@@ -269,7 +269,7 @@ $1 == "option" && NF >= 2{

         if (val != 1) { # error reading it
            if (val == 0)
-               print "option", opt ": ERROR: missing contination line"
+               print "option", opt ": ERROR: missing continuation line"
            else
               print "option", opt ": ERROR: error reading continuation line"

@@ -362,7 +362,7 @@ pre != 0 && $1 == "chunk" && NF >= 2{

         if (val != 1) { # error reading it
            if (val == 0)
-               print "chunk", opt ": ERROR: missing contination line"
+               print "chunk", opt ": ERROR: missing continuation line"
            else
               print "chunk", opt ": ERROR: error reading continuation line"

@@ -493,7 +493,7 @@ $1 ~ /^@/{
   next
 }

-# Check for unreognized lines, because of the preprocessing chunk
+# Check for unrecognized lines, because of the preprocessing chunk
 # format errors will be detected on the first pass independent of
 # any other format errors.
 {
@@ -585,7 +585,7 @@ END{
   # If an option[opt] is 'on' then turn on all requires[opt]
   # If an option[opt] is 'off' then turn off all enabledby[opt]
   #
-   # Error out if we have to turn 'on' an 'off' option or vice versa.
+   # Error out if we have to turn 'on' to an 'off' option or vice versa.
   npending = 0
   for (opt in option) if (opt != "") {
      if (option[opt] == "on" || option[opt] == "off") {
@@ -677,7 +677,7 @@ END{
         for (j=1; j<=nreqs; ++j) {
            print "#ifndef PNG_" r[j] "_SUPPORTED" >out
            print "#   undef PNG_on /*!" r[j] "*/" >out
-            # this error appears in the final output if something
+            # This error appears in the final output if something
            # was switched 'on' but the processing above to force
            # the requires did not work
            if (option[i] == "on") {
--- a/scripts/pnglibconf.dfa
+++ b/scripts/pnglibconf.dfa
@@ -578,19 +578,21 @@ option COLORSPACE enables GAMMA disabled
 # PNG_sRGB_PROFILE_CHECKS setting controls how much work is done during the
 # check:
 #
-# 0: Just validate the profile MD5 signature if present, otherwise use
-#    the checks in option 1.
+# -1: Don't do any sRGB profile checking.
 #
-# 1: Additionally check the length, intent and adler32 checksum of the
-#    actual data.   If enabled this will reject known profiles that have
-#    had the rendering intent in the header changed as well as other edits
-#    done without updating the checksum.  See the discussion below.
+#  0: Just validate the profile MD5 signature if present, otherwise use
+#     the checks in option 1.
 #
-# 2: Additionally checksum all the data using the ethernet CRC32 algorithm.
-#    This makes it more difficult to fake profiles and makes it less likely
-#    to get a false positive on profiles with no signature, but is probably
-#    just a waste of time since all currently approved ICC sRGB profiles have
-#    a secure MD5 signature.
+#  1: Additionally check the length, intent and adler32 checksum of the
+#     actual data.   If enabled this will reject known profiles that have
+#     had the rendering intent in the header changed as well as other edits
+#     done without updating the checksum.  See the discussion below.
+#
+#  2: Additionally checksum all the data using the ethernet CRC32 algorithm.
+#     This makes it more difficult to fake profiles and makes it less likely
+#     to get a false positive on profiles with no signature, but is probably
+#     just a waste of time since all currently approved ICC sRGB profiles have
+#     a secure MD5 signature.
 #
 # The rendering intent.  An ICC profile stores an intended rendering intent,
 # but does not include the value in the signature.  The intent is documented
--- a/scripts/pnglibconf.h.prebuilt
+++ b/scripts/pnglibconf.h.prebuilt
@@ -1,10 +1,10 @@
-/* libpng 1.6.11beta01 STANDARD API DEFINITION */
+/* libpng 1.6.12 STANDARD API DEFINITION */

 /* pnglibconf.h - library build configuration */

-/* Libpng version 1.6.11beta01 - March 17, 2014 */
+/* Libpng version 1.6.12 - June 12, 2014 */

-/* Copyright (c) 1998-2013 Glenn Randers-Pehrson */
+/* Copyright (c) 1998-2014 Glenn Randers-Pehrson */

 /* This code is released under the libpng license. */
 /* For conditions of distribution and use, see the disclaimer */
--- a/scripts/symbols.def
+++ b/scripts/symbols.def
@@ -1,4 +1,4 @@
-;Version 1.6.11beta01
+;Version 1.6.12
 ;--------------------------------------------------------------
 ; LIBPNG symbol list as a Win32 DEF file
 ; Contains all the symbols that can be exported from libpng
--- a/scripts/symbols.dfn
+++ b/scripts/symbols.dfn
@@ -11,9 +11,9 @@

 /* NOTE: making 'symbols.chk' checks both that the exported
 * symbols in the library don't change and (implicitly) that
- * scripts/pnglibconf.h.prebuilt is as expected.  If scripts/pnglibconf.h.prebuilt
- * is remade using scripts/pnglibconf.dfa then this checks the
- * .dfa file too.
+ * scripts/pnglibconf.h.prebuilt is as expected.
+ * If scripts/pnglibconf.h.prebuilt is remade using
+ * scripts/pnglibconf.dfa then this checks the .dfa file too.
 */

 #define PNG_EXPORTA(ordinal, type, name, args, attributes)\
Author	SHA1	Message	Date
Glenn Randers-Pehrson	e429c66cea	[libpng16] Imported from libpng-1.6.12.tar	2014-06-11 20:41:51 -05:00
Glenn Randers-Pehrson	1a4c0144da	[libpng16] Bump version to 1.6.12rc04	2014-06-08 12:10:04 -05:00
Glenn Randers-Pehrson	db1a0e763f	[libpng16] Imported from libpng-1.6.12rc03.tar	2014-06-07 22:46:46 -05:00
Glenn Randers-Pehrson	41694dcaea	[libpng16] Ensure "__has_attribute()" macro exists before trying to use it with old clang compilers (MacPorts Ticket #43939).	2014-06-07 22:27:44 -05:00
Glenn Randers-Pehrson	ff3fb08157	[libpng16] Imported from libpng-1.6.12rc02.tar	2014-06-07 14:49:03 -05:00
Glenn Randers-Pehrson	79b7e4e621	[libpng16] Changed file permissions of contrib/tools/intgamma.sh from 0644 to 0755 (Cosmin).	2014-06-07 14:47:02 -05:00
Glenn Randers-Pehrson	b41a37d403	[libpng16] Imported from libpng-1.6.12rc01.tar	2014-06-06 18:31:35 -05:00
Glenn Randers-Pehrson	b7afba6a0b	[libpng16] Relocated new code from 1.6.11beta06 in png.c to a point after the declarations (Max Stepin).	2014-06-06 12:07:07 -05:00
Glenn Randers-Pehrson	da7b692ce0	[libpng16] Bump version to 1.6.12beta01	2014-06-06 11:57:30 -05:00
Glenn Randers-Pehrson	c4e0f3de64	[libpng16] Imported from libpng-1.6.11.tar	2014-06-05 10:00:45 -05:00
Glenn Randers-Pehrson	ee6050ecb4	[libpng16] Imported from libpng-1.6.11rc02.tar	2014-06-03 22:02:34 -05:00
Glenn Randers-Pehrson	165f072144	[libpng16] Imported from libpng-1.6.11rc01.tar	2014-05-27 11:15:53 -05:00
Glenn Randers-Pehrson	7acfe50855	[libpng16] Bump version to 1.6.11beta07	2014-05-19 21:20:05 -05:00
Glenn Randers-Pehrson	5808e7b8c8	[libpng16] Imported from libpng-1.6.11beta06.tar	2014-05-19 21:11:36 -05:00
Glenn Randers-Pehrson	f85092bc7b	[libpng16] Fix cut-and-paste error in scripts/symbols.dfn, from 1.6.11beta02.	2014-05-19 21:08:49 -05:00
Glenn Randers-Pehrson	d1c5f48c05	[libpng16] Minor update to documentation and CHANGES/ANNOUNCE files.	2014-05-09 21:06:27 -05:00
Glenn Randers-Pehrson	e95ce2c517	[libpng16] Added PNG_SKIP_sRGB_CHECK_PROFILE choice for png_set_option().	2014-05-07 12:07:12 -05:00
Glenn Randers-Pehrson	0d5ac5d809	[libpng16] Bump version to 1.6.11beta06	2014-04-26 06:41:54 -05:00
Glenn Randers-Pehrson	f30aa7ed92	[libpng16] Imported from libpng-1.6.11beta05.tar	2014-04-26 06:36:40 -05:00
Glenn Randers-Pehrson	ab9736a647	[libpng16] Allow writing ICC V2 profiles that lack padding (Kai-Uwe Behrmann).	2014-04-25 06:14:50 -05:00
Glenn Randers-Pehrson	5a1d1b5369	[libpng16] Do not reject ICC V2 profiles that lack padding (Kai-Uwe Behrmann).	2014-04-24 15:54:28 -05:00
Glenn Randers-Pehrson	d5201df56b	[libpng16] Bump version to 1.6.11beta05	2014-04-20 20:23:13 -05:00
Glenn Randers-Pehrson	be19c07dd9	[libpng16] Imported from libpng-1.6.11beta04.tar	2014-04-20 20:15:26 -05:00
Glenn Randers-Pehrson	0ace9f589f	[libpng16] PNG_sRGB_PROFILE_CHECKING = (-1) now means no sRGB profile checking.	2014-04-20 20:06:14 -05:00
Glenn Randers-Pehrson	72855fb11e	[libpng16] Made progressive reading of interlaced images consistent with the behavior of the sequential reader and consistent with the manual. The row_callback now receives the proper pass number and unexpanded rows, when png_combine_row is not used or not built, by moving some code out of the PNG_READ_INTERLACING_SUPPORTED blocks.	2014-04-13 21:27:25 -05:00
Glenn Randers-Pehrson	9f1aa186e6	[libpng16] Added two CVE numbers to the January 2013 entry in the CHANGES file.	2014-04-10 16:46:35 -05:00
Glenn Randers-Pehrson	7a0ca967b4	[libpng16] Bump version to 1.6.11beta04	2014-04-06 14:18:13 -05:00
Glenn Randers-Pehrson	478062d9b5	[libpng16] Imported from libpng-1.6.11beta03.tar	2014-04-06 14:17:58 -05:00
Glenn Randers-Pehrson	86b8016ee9	[libpng16] Fix some permissions	2014-04-06 12:01:51 -05:00
Glenn Randers-Pehrson	f169806b7b	[libpng16] Bump version to 1.6.11beta03	2014-04-06 10:20:44 -05:00
Glenn Randers-Pehrson	c4b3718856	[libpng16] Imported from libpng-1.6.11beta02.tar	2014-04-06 09:07:56 -05:00
Glenn Randers-Pehrson	fa26eb1678	[libpng16] Fixed a typo in pngrutil.c, introduced in libpng-1.5.6, that interferes with "blocky" expansion of sub-8-bit interlaced PNG files.	2014-04-06 09:06:37 -05:00
Glenn Randers-Pehrson	d17313e075	[libpng16] Bump version to 1.6.11beta03	2014-03-25 17:10:53 -05:00
Glenn Randers-Pehrson	6b570f11e1	[libpng16] Imported from libpng-1.6.11beta02.tar	2014-03-25 17:10:44 -05:00
Glenn Randers-Pehrson	804c76b47b	[libpng16] Fixed syntax of Copy command in makefile.amiga	2014-03-22 18:44:24 -05:00
Glenn Randers-Pehrson	247d262d3a	[libpng16] Complete the update of scripts/makefile.ne12bsd	2014-03-22 13:40:25 -05:00
Cosmin Truta	9ab7b4ca58	[libpng16] Allow an easy replacement of the default pre-built configuration header with a custom header, via the make PNGLIBCONF_H_PREBUILT macro.	2014-03-22 13:13:11 -05:00
Cosmin Truta	ae6eaa89e5	[libpng16] Don't warn about invalid dimensions exceeding user limits.	2014-03-22 09:39:33 -05:00
Cosmin Truta	82200daec2	[libpng16] $(CP) is now used alongside $(RM_F). Also, use 'copy' instead of 'cp' where applicable, and applied other minor makefile changes.	2014-03-22 09:29:59 -05:00
Cosmin Truta	6572c7dab5	[libpng16] Silence 'unused parameter' build warnings (Cosmin).	2014-03-22 09:20:53 -05:00
Glenn Randers-Pehrson	372cad05a9	[libpng16] Committed wrong version of INSTALL.	2014-03-21 13:26:43 -05:00
Glenn Randers-Pehrson	010222c55d	[libpng16] Mention scripts/pnglibconf.h.prebuilt in INSTALL.	2014-03-21 12:53:06 -05:00
Glenn Randers-Pehrson	d74d82137b	[libpng16] Cosmetic revision of previous change	2014-03-17 15:35:28 -05:00
Glenn Randers-Pehrson	a518abd582	[libpng16] Removed #if/#else/#endif from inside two pow() calls in pngvalid.c because they were handled improperly by Portland Group's PGI-14.1 - PGI-14.3 when using its "__builtin_pow()" function.	2014-03-17 15:29:25 -05:00
Glenn Randers-Pehrson	23646318e4	[libpng16] Bump version to 1.6.11beta02	2014-03-17 13:21:33 -05:00