diff --git a/ANNOUNCE b/ANNOUNCE
index 6159cc52e..b7b5362cd 100644
--- a/ANNOUNCE
+++ b/ANNOUNCE
@@ -644,8 +644,6 @@ Version 1.7.0beta40 [November 6, 2014]
     warnings go away.
 
 Version 1.7.0beta41 [November 7, 2014]
-  Removed #ifdef PNG_16BIT_SUPPORTED/#endif around png_product2(); it is
-    needed by png_reciprocal2().
   Added #ifdef PNG_16BIT_SUPPORTED/#endif around png_log16bit() and
     png_do_swap().
 
diff --git a/CHANGES b/CHANGES
index 045f7b3a7..4a8b9846a 100644
--- a/CHANGES
+++ b/CHANGES
@@ -4933,8 +4933,6 @@ Version 1.7.0beta40 [November 6, 2014]
     warnings go away.
 
 Version 1.7.0beta41 [November 7, 2014]
-  Removed #ifdef PNG_16BIT_SUPPORTED/#endif around png_product2(); it is
-    needed by png_reciprocal2().
   Added #ifdef PNG_16BIT_SUPPORTED/#endif around png_log16bit() and
     png_do_swap().
 
diff --git a/example.c b/example.c
index 9d9b4c465..39bd55208 100644
--- a/example.c
+++ b/example.c
@@ -494,7 +494,7 @@ void read_png(FILE *fp, unsigned int sig_read)  /* File is already open */
                         max_screen_colors, histogram, 0);
       }
    }
-#endif /* PNG_READ_QUANTIZE_SUPPORTED */
+#endif /* READ_QUANTIZE */
 
    /* Invert monochrome files to have 0 as white and 1 as black */
    png_set_invert_mono(png_ptr);
@@ -532,7 +532,7 @@ void read_png(FILE *fp, unsigned int sig_read)  /* File is already open */
    number_passes = png_set_interlace_handling(png_ptr);
 #else
    number_passes = 1;
-#endif /* PNG_READ_INTERLACING_SUPPORTED */
+#endif /* READ_INTERLACING */
 
 
    /* Optional call to gamma correct and add the background to the palette
@@ -744,7 +744,7 @@ row_callback(png_structp png_ptr, png_bytep new_row,
     * to pass the current row as new_row, and the function will combine
     * the old row and the new row.
     */
-#endif /* PNG_READ_INTERLACING_SUPPORTED */
+#endif /* READ_INTERLACING */
 }
 
 end_callback(png_structp png_ptr, png_infop info)
diff --git a/png.c b/png.c
index 8005f3147..72cde13b5 100644
--- a/png.c
+++ b/png.c
@@ -65,7 +65,7 @@ png_sig_cmp(png_const_bytep sig, png_size_t start, png_size_t num_to_check)
    return ((int)(memcmp(&sig[start], &png_signature[start], num_to_check)));
 }
 
-#endif /* PNG_READ_SUPPORTED */
+#endif /* READ */
 
 #if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
 /* Function to allocate memory for zlib */
@@ -576,7 +576,7 @@ png_free_data(png_const_structrp png_ptr, png_inforp info_ptr, png_uint_32 mask,
 
    info_ptr->free_me &= ~mask;
 }
-#endif /* defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) */
+#endif /* READ || WRITE */
 
 /* This function returns a pointer to the io_ptr associated with the user
  * functions.  The application should free any memory associated with this
@@ -680,7 +680,7 @@ png_convert_to_rfc1123_buffer(char out[29], png_const_timep ptime)
 }
 #  endif /* PNG_TIME_RFC1123_SUPPORTED */
 
-#endif /* defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) */
+#endif /* READ || WRITE */
 
 png_const_charp PNGAPI
 png_get_copyright(png_const_structrp png_ptr)
@@ -2261,7 +2261,7 @@ png_icc_set_sRGB(png_const_structrp png_ptr,
       (void)png_colorspace_set_sRGB(png_ptr, colorspace,
          (int)/*already checked*/png_get_uint_32(profile+64));
 }
-#endif /* PNG_READ_sRGB_SUPPORTED */
+#endif /* READ_sRGB */
 
 int /* PRIVATE */
 png_colorspace_set_ICC(png_const_structrp png_ptr, png_colorspacerp colorspace,
@@ -3276,8 +3276,8 @@ png_gamma_significant(png_fixed_point gamma_val)
 #endif
 
 #ifdef PNG_READ_GAMMA_SUPPORTED
+#ifndef PNG_FLOATING_ARITHMETIC_SUPPORTED
 /* A local convenience routine. */
-#if defined(PNG_16BIT_SUPPORTED) || !defined(PNG_FLOATING_ARITHMETIC_SUPPORTED)
 static png_fixed_point
 png_product2(png_fixed_point a, png_fixed_point b)
 {
@@ -3298,7 +3298,7 @@ png_product2(png_fixed_point a, png_fixed_point b)
 
    return 0; /* overflow */
 }
-#endif /* PNG_16BIT_SUPPORTED || !PNG_FLOATING_ARITHMETIC_SUPPORTED */
+#endif
 
 /* The inverse of the above. */
 png_fixed_point
@@ -4470,4 +4470,4 @@ png_image_error(png_imagep image, png_const_charp error_message)
 }
 
 #endif /* SIMPLIFIED READ/WRITE */
-#endif /* defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) */
+#endif /* REA) || WRITE */
diff --git a/pngerror.c b/pngerror.c
index 3e05da61b..0a33e8952 100644
--- a/pngerror.c
+++ b/pngerror.c
@@ -27,7 +27,7 @@ static PNG_FUNCTION(void, png_default_error,PNGARG((png_const_structrp png_ptr,
 static void /* PRIVATE */
 png_default_warning PNGARG((png_const_structrp png_ptr,
    png_const_charp warning_message));
-#endif /* PNG_WARNINGS_SUPPORTED */
+#endif /* WARNINGS */
 
 /* This function is called whenever there is a fatal error.  This function
  * should not be changed.  If there is a need to handle errors differently,
@@ -103,7 +103,7 @@ png_err,(png_const_structrp png_ptr),PNG_NORETURN)
       use the default handler, which will not return. */
    png_default_error(png_ptr, "");
 }
-#endif /* PNG_ERROR_TEXT_SUPPORTED */
+#endif /* ERROR_TEXT */
 
 /* Utility to safely appends strings to a buffer.  This never errors out so
  * error checking is not required in the caller.
@@ -355,7 +355,7 @@ png_formatted_warning(png_const_structrp png_ptr, png_warning_parameters p,
     */
    png_warning(png_ptr, msg);
 }
-#endif /* PNG_WARNINGS_SUPPORTED */
+#endif /* WARNINGS */
 
 #ifdef PNG_BENIGN_ERRORS_SUPPORTED
 void PNGAPI
@@ -473,7 +473,7 @@ png_format_buffer(png_const_structrp png_ptr, png_charp buffer, png_const_charp
       buffer[iout] = '\0';
    }
 }
-#endif /* PNG_WARNINGS_SUPPORTED || PNG_ERROR_TEXT_SUPPORTED */
+#endif /* WARNINGS || ERROR_TEXT */
 
 #if defined(PNG_READ_SUPPORTED) && defined(PNG_ERROR_TEXT_SUPPORTED)
 PNG_FUNCTION(void,PNGAPI
@@ -490,7 +490,7 @@ png_chunk_error,(png_const_structrp png_ptr, png_const_charp error_message),
       png_error(png_ptr, msg);
    }
 }
-#endif /* PNG_READ_SUPPORTED && PNG_ERROR_TEXT_SUPPORTED */
+#endif /* READ && ERROR_TEXT */
 
 #ifdef PNG_WARNINGS_SUPPORTED
 void PNGAPI
@@ -506,7 +506,7 @@ png_chunk_warning(png_const_structrp png_ptr, png_const_charp warning_message)
       png_warning(png_ptr, msg);
    }
 }
-#endif /* PNG_WARNINGS_SUPPORTED */
+#endif /* WARNINGS */
 
 #ifdef PNG_READ_SUPPORTED
 #ifdef PNG_BENIGN_ERRORS_SUPPORTED
@@ -525,7 +525,7 @@ png_chunk_benign_error(png_const_structrp png_ptr, png_const_charp
 #  endif
 }
 #endif
-#endif /* PNG_READ_SUPPORTED */
+#endif /* READ */
 
 void /* PRIVATE */
 png_chunk_report(png_const_structrp png_ptr, png_const_charp message, int error)
@@ -834,7 +834,7 @@ png_default_warning(png_const_structrp png_ptr, png_const_charp warning_message)
 #endif
    PNG_UNUSED(png_ptr) /* Make compiler happy */
 }
-#endif /* PNG_WARNINGS_SUPPORTED */
+#endif /* WARNINGS */
 
 /* This function is called when the application wants to use another method
  * of handling errors and warnings.  Note that the error function MUST NOT
@@ -970,4 +970,4 @@ png_safe_execute(png_imagep image_in, int (*function)(png_voidp), png_voidp arg)
    return result;
 }
 #endif /* SIMPLIFIED READ/WRITE */
-#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */
+#endif /* READ || WRITE */
diff --git a/pngget.c b/pngget.c
index ebb1fb70c..baccc5b0c 100644
--- a/pngget.c
+++ b/pngget.c
@@ -455,12 +455,12 @@ png_get_pHYs_dpi(png_const_structrp png_ptr, png_const_inforp info_ptr,
 
    return (retval);
 }
-#endif /* PNG_pHYs_SUPPORTED */
-#endif  /* PNG_INCH_CONVERSIONS_SUPPORTED */
+#endif /* pHYs */
+#endif  /* INCH_CONVERSIONS */
 
 /* png_get_channels really belongs in here, too, but it's been around longer */
 
-#endif  /* PNG_EASY_ACCESS_SUPPORTED */
+#endif  /* EASY_ACCESS */
 
 
 png_byte PNGAPI
@@ -1181,7 +1181,7 @@ png_get_chunk_malloc_max (png_const_structrp png_ptr)
 {
    return (png_ptr ? png_ptr->user_chunk_malloc_max : 0);
 }
-#endif /* ?PNG_SET_USER_LIMITS_SUPPORTED */
+#endif /* ?SET_USER_LIMITS */
 
 /* These functions were added to libpng 1.4.0 */
 #ifdef PNG_IO_STATE_SUPPORTED
@@ -1196,7 +1196,7 @@ png_get_io_chunk_type (png_const_structrp png_ptr)
 {
    return png_ptr->chunk_name;
 }
-#endif /* ?PNG_IO_STATE_SUPPORTED */
+#endif /* ?IO_STATE */
 
 #ifdef PNG_CHECK_FOR_INVALID_INDEX_SUPPORTED
 #  ifdef PNG_GET_PALETTE_MAX_SUPPORTED
@@ -1211,4 +1211,4 @@ png_get_palette_max(png_const_structrp png_ptr, png_const_inforp info_ptr)
 #  endif
 #endif
 
-#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */
+#endif /* READ || WRITE */
diff --git a/pngmem.c b/pngmem.c
index db336c869..65bfaff0d 100644
--- a/pngmem.c
+++ b/pngmem.c
@@ -225,7 +225,7 @@ png_free(png_const_structrp png_ptr, png_voidp ptr)
       png_ptr->free_fn(png_constcast(png_structrp,png_ptr), ptr);
 
    else
-#endif /* PNG_USER_MEM_SUPPORTED */
+#endif /* USER_MEM */
       free(ptr);
 }
 
@@ -257,5 +257,5 @@ png_get_mem_ptr(png_const_structrp png_ptr)
 
    return png_ptr->mem_ptr;
 }
-#endif /* PNG_USER_MEM_SUPPORTED */
-#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */
+#endif /* USER_MEM */
+#endif /* READ || WRITE */
diff --git a/pngpread.c b/pngpread.c
index 816577cb6..b86dd63cc 100644
--- a/pngpread.c
+++ b/pngpread.c
@@ -1106,7 +1106,7 @@ png_read_push_finish_row(png_structrp png_ptr)
 
       } while (png_ptr->iwidth == 0 || png_ptr->num_rows == 0);
    }
-#endif /* PNG_READ_INTERLACING_SUPPORTED */
+#endif /* READ_INTERLACING */
 }
 
 void /* PRIVATE */
@@ -1146,7 +1146,7 @@ png_progressive_combine_row(png_const_structrp png_ptr, png_bytep old_row,
    if (new_row != NULL)
       png_combine_row(png_ptr, old_row, 1/*blocky display*/);
 }
-#endif /* PNG_READ_INTERLACING_SUPPORTED */
+#endif /* READ_INTERLACING */
 
 void PNGAPI
 png_set_progressive_read_fn(png_structrp png_ptr, png_voidp progressive_ptr,
@@ -1171,4 +1171,4 @@ png_get_progressive_ptr(png_const_structrp png_ptr)
 
    return png_ptr->io_ptr;
 }
-#endif /* PNG_PROGRESSIVE_READ_SUPPORTED */
+#endif /* PROGRESSIVE_READ */
diff --git a/pngread.c b/pngread.c
index f67d4a0c5..57ef910ce 100644
--- a/pngread.c
+++ b/pngread.c
@@ -44,7 +44,7 @@ png_create_read_struct_2,(png_const_charp user_png_ver, png_voidp error_ptr,
 {
    png_structp png_ptr = png_create_png_struct(user_png_ver, error_ptr,
       error_fn, warn_fn, mem_ptr, malloc_fn, free_fn);
-#endif /* PNG_USER_MEM_SUPPORTED */
+#endif /* USER_MEM */
 
    if (png_ptr != NULL)
    {
@@ -252,7 +252,7 @@ png_read_info(png_structrp png_ptr, png_inforp info_ptr)
             PNG_HANDLE_CHUNK_AS_DEFAULT);
    }
 }
-#endif /* PNG_SEQUENTIAL_READ_SUPPORTED */
+#endif /* SEQUENTIAL_READ */
 
 /* Optional call to update the users info_ptr structure */
 void PNGAPI
@@ -302,7 +302,7 @@ png_start_read_image(png_structrp png_ptr)
             "png_start_read_image/png_read_update_info: duplicate call");
    }
 }
-#endif /* PNG_SEQUENTIAL_READ_SUPPORTED */
+#endif /* SEQUENTIAL_READ */
 
 #ifdef PNG_SEQUENTIAL_READ_SUPPORTED
 #ifdef PNG_MNG_FEATURES_SUPPORTED
@@ -369,7 +369,7 @@ png_do_read_intrapixel(png_row_infop row_info, png_bytep row)
       }
    }
 }
-#endif /* PNG_MNG_FEATURES_SUPPORTED */
+#endif /* MNG_FEATURES */
 
 void PNGAPI
 png_read_row(png_structrp png_ptr, png_bytep row, png_bytep dsp_row)
@@ -436,7 +436,7 @@ png_read_row(png_structrp png_ptr, png_bytep row, png_bytep dsp_row)
       png_warning(png_ptr, "PNG_READ_SWAP_SUPPORTED is not defined");
 #endif
    }
-#endif /* PNG_WARNINGS_SUPPORTED */
+#endif /* WARNINGS */
 
 #ifdef PNG_READ_INTERLACING_SUPPORTED
    /* If interlaced and we do not need a new row, combine row and return.
@@ -605,7 +605,7 @@ png_read_row(png_structrp png_ptr, png_bytep row, png_bytep dsp_row)
       (*(png_ptr->read_row_fn))(png_ptr, png_ptr->row_number, png_ptr->pass);
 
 }
-#endif /* PNG_SEQUENTIAL_READ_SUPPORTED */
+#endif /* SEQUENTIAL_READ */
 
 #ifdef PNG_SEQUENTIAL_READ_SUPPORTED
 /* Read one or more rows of image data.  If the image is interlaced,
@@ -672,7 +672,7 @@ png_read_rows(png_structrp png_ptr, png_bytepp row,
          dp++;
       }
 }
-#endif /* PNG_SEQUENTIAL_READ_SUPPORTED */
+#endif /* SEQUENTIAL_READ */
 
 #ifdef PNG_SEQUENTIAL_READ_SUPPORTED
 /* Read the entire image.  If the image has an alpha channel or a tRNS
@@ -746,7 +746,7 @@ png_read_image(png_structrp png_ptr, png_bytepp image)
       }
    }
 }
-#endif /* PNG_SEQUENTIAL_READ_SUPPORTED */
+#endif /* SEQUENTIAL_READ */
 
 #ifdef PNG_SEQUENTIAL_READ_SUPPORTED
 /* Read the end of the PNG file.  Will not read past the end of the
@@ -912,7 +912,7 @@ png_read_end(png_structrp png_ptr, png_inforp info_ptr)
             PNG_HANDLE_CHUNK_AS_DEFAULT);
    } while ((png_ptr->mode & PNG_HAVE_IEND) == 0);
 }
-#endif /* PNG_SEQUENTIAL_READ_SUPPORTED */
+#endif /* SEQUENTIAL_READ */
 
 /* Free all memory used in the read struct */
 static void
@@ -1220,8 +1220,8 @@ png_read_png(png_structrp png_ptr, png_inforp info_ptr,
 
    PNG_UNUSED(params)
 }
-#endif /* PNG_INFO_IMAGE_SUPPORTED */
-#endif /* PNG_SEQUENTIAL_READ_SUPPORTED */
+#endif /* INFO_IMAGE */
+#endif /* SEQUENTIAL_READ */
 
 #ifdef PNG_SIMPLIFIED_READ_SUPPORTED
 /* SIMPLIFIED READ
@@ -1507,7 +1507,7 @@ png_image_begin_read_from_file(png_imagep image, const char *file_name)
 
    return 0;
 }
-#endif /* PNG_STDIO_SUPPORTED */
+#endif /* STDIO */
 
 static void PNGCBAPI
 png_image_memory_read(png_structp png_ptr, png_bytep out, png_size_t need)
@@ -1625,7 +1625,7 @@ png_image_skip_unused_chunks(png_structrp png_ptr)
 #  define PNG_SKIP_CHUNKS(p) png_image_skip_unused_chunks(p)
 #else
 #  define PNG_SKIP_CHUNKS(p) ((void)0)
-#endif /* PNG_HANDLE_AS_UNKNOWN_SUPPORTED */
+#endif /* HANDLE_AS_UNKNOWN */
 
 /* The following macro gives the exact rounded answer for all values in the
  * range 0..255 (it actually divides by 51.2, but the rounding still generates
@@ -4116,5 +4116,5 @@ png_image_finish_read(png_imagep image, png_const_colorp background,
    return 0;
 }
 
-#endif /* PNG_SIMPLIFIED_READ_SUPPORTED */
-#endif /* PNG_READ_SUPPORTED */
+#endif /* SIMPLIFIED_READ */
+#endif /* READ */
diff --git a/pngrio.c b/pngrio.c
index d75ac5b4d..cab401924 100644
--- a/pngrio.c
+++ b/pngrio.c
@@ -117,4 +117,4 @@ png_set_read_fn(png_structrp png_ptr, png_voidp io_ptr,
    png_ptr->output_flush_fn = NULL;
 #endif
 }
-#endif /* PNG_READ_SUPPORTED */
+#endif /* READ */
diff --git a/pngrtran.c b/pngrtran.c
index 138ac8130..9043e2710 100644
--- a/pngrtran.c
+++ b/pngrtran.c
@@ -791,7 +791,7 @@ png_set_quantize(png_structrp png_ptr, png_colorp palette,
       png_free(png_ptr, distance);
    }
 }
-#endif /* PNG_READ_QUANTIZE_SUPPORTED */
+#endif /* READ_QUANTIZE */
 
 #ifdef PNG_READ_GAMMA_SUPPORTED
 void PNGFAPI
@@ -912,7 +912,7 @@ png_set_tRNS_to_alpha(png_structrp png_ptr)
 
    png_ptr->transformations |= (PNG_EXPAND | PNG_EXPAND_tRNS);
 }
-#endif /* defined(PNG_READ_EXPAND_SUPPORTED) */
+#endif /* READ_EXPAND */
 
 #ifdef PNG_READ_EXPAND_16_SUPPORTED
 /* Expand to 16-bit channels, expand the tRNS chunk too (because otherwise
@@ -1695,7 +1695,7 @@ png_init_read_transformations(png_structrp png_ptr)
 
       else
       /* Transformation does not include PNG_BACKGROUND */
-#endif /* PNG_READ_BACKGROUND_SUPPORTED */
+#endif /* READ_BACKGROUND */
       if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE
 #ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED
          /* RGB_TO_GRAY needs to have non-gamma-corrected values! */
@@ -1725,7 +1725,7 @@ png_init_read_transformations(png_structrp png_ptr)
 #ifdef PNG_READ_BACKGROUND_SUPPORTED
    else
 #endif
-#endif /* PNG_READ_GAMMA_SUPPORTED */
+#endif /* READ_GAMMA */
 
 #ifdef PNG_READ_BACKGROUND_SUPPORTED
    /* No GAMMA transformation (see the hanging else 4 lines above) */
@@ -1764,7 +1764,7 @@ png_init_read_transformations(png_structrp png_ptr)
 
       png_ptr->transformations &= ~PNG_COMPOSE;
    }
-#endif /* PNG_READ_BACKGROUND_SUPPORTED */
+#endif /* READ_BACKGROUND */
 
 #ifdef PNG_READ_SHIFT_SUPPORTED
    if ((png_ptr->transformations & PNG_SHIFT) != 0 &&
@@ -1810,7 +1810,7 @@ png_init_read_transformations(png_structrp png_ptr)
             png_ptr->palette[i].blue = (png_byte)component;
          }
    }
-#endif  /* PNG_READ_SHIFT_SUPPORTED */
+#endif  /* READ_SHIFT */
 }
 
 /* Modify the info structure to reflect the transformations.  The
@@ -1915,7 +1915,7 @@ png_read_transform_info(png_structrp png_ptr, png_inforp info_ptr)
             CONFIGURATION ERROR: you must enable at least one 16 to 8 method
 #        endif
 #    endif
-#endif /* !READ_16BIT_SUPPORTED */
+#endif /* !READ_16BIT */
    }
 
 #ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED
@@ -3826,7 +3826,7 @@ png_do_compose(png_row_infop row_info, png_bytep row, png_structrp png_ptr)
       }
    }
 }
-#endif /* PNG_READ_BACKGROUND_SUPPORTED || PNG_READ_ALPHA_MODE_SUPPORTED */
+#endif /* READ_BACKGROUND || READ_ALPHA_MODE */
 
 #ifdef PNG_READ_GAMMA_SUPPORTED
 /* Gamma correct the image, avoiding the alpha channel.  Make sure
@@ -4586,7 +4586,7 @@ png_do_quantize(png_row_infop row_info, png_bytep row,
       }
    }
 }
-#endif /* PNG_READ_QUANTIZE_SUPPORTED */
+#endif /* READ_QUANTIZE */
 
 /* Transform the row.  The order of transformations is significant,
  * and is very touchy.  If you add a transformation, take care to
@@ -4781,7 +4781,7 @@ png_do_read_transformations(png_structrp png_ptr, png_row_infop row_info)
       if (row_info->rowbytes == 0)
          png_error(png_ptr, "png_do_quantize returned rowbytes=0");
    }
-#endif /* PNG_READ_QUANTIZE_SUPPORTED */
+#endif /* READ_QUANTIZE */
 
 #ifdef PNG_READ_EXPAND_16_SUPPORTED
    /* Do the expansion now, after all the arithmetic has been done.  Notice
@@ -4884,5 +4884,5 @@ png_do_read_transformations(png_structrp png_ptr, png_row_infop row_info)
    }
 #endif
 }
-#endif /* PNG_READ_TRANSFORMS_SUPPORTED */
-#endif /* PNG_READ_SUPPORTED */
+#endif /* READ_TRANSFORMS */
+#endif /* READ */
diff --git a/pngrutil.c b/pngrutil.c
index 08c31df30..ecb47a561 100644
--- a/pngrutil.c
+++ b/pngrutil.c
@@ -76,7 +76,7 @@ png_get_uint_16)(png_const_bytep buf)
 {
    return PNG_U16(buf[0], buf[1]);
 }
-#endif /* PNG_READ_INT_FUNCTIONS_SUPPORTED */
+#endif /* READ_INT_FUNCTIONS */
 
 /* This is an exported function however its error handling is too harsh for most
  * internal use.  For example if it were used for reading the chunk parameters
@@ -304,7 +304,7 @@ png_read_buffer(png_structrp png_ptr, png_alloc_size_t new_size, int warn)
 
    return buffer;
 }
-#endif /* PNG_READ_iCCP|iTXt|pCAL|sCAL|sPLT|tEXt|zTXt|SEQUENTIAL_READ */
+#endif /* READ_iCCP|iTXt|pCAL|sCAL|sPLT|tEXt|zTXt|SEQUENTIAL_READ */
 
 /* png_inflate_claim: claim the zstream for some nefarious purpose that involves
  * decompression.  Returns Z_OK on success, else a zlib error code.  It checks
@@ -701,7 +701,7 @@ png_decompress_chunk(png_structrp png_ptr,
       return Z_MEM_ERROR;
    }
 }
-#endif /* PNG_READ_COMPRESSED_TEXT_SUPPORTED */
+#endif /* READ_COMPRESSED_TEXT */
 
 #ifdef PNG_READ_iCCP_SUPPORTED
 /* Perform a partial read and decompress, producing 'avail_out' bytes and
@@ -1278,7 +1278,7 @@ png_handle_sRGB(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length)
    (void)png_colorspace_set_sRGB(png_ptr, &png_ptr->colorspace, intent);
    png_colorspace_sync(png_ptr, info_ptr);
 }
-#endif /* PNG_READ_sRGB_SUPPORTED */
+#endif /* READ_sRGB */
 
 #ifdef PNG_READ_iCCP_SUPPORTED
 void /* PRIVATE */
@@ -1551,7 +1551,7 @@ png_handle_iCCP(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length)
    if (errmsg != NULL) /* else already output */
       png_chunk_benign_error(png_ptr, errmsg);
 }
-#endif /* PNG_READ_iCCP_SUPPORTED */
+#endif /* READ_iCCP */
 
 #ifdef PNG_READ_sPLT_SUPPORTED
 void /* PRIVATE */
@@ -1729,7 +1729,7 @@ png_handle_sPLT(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length)
 
    png_free(png_ptr, new_palette.entries);
 }
-#endif /* PNG_READ_sPLT_SUPPORTED */
+#endif /* READ_sPLT */
 
 #ifdef PNG_READ_tRNS_SUPPORTED
 void /* PRIVATE */
@@ -2744,7 +2744,7 @@ png_cache_unknown_chunk(png_structrp png_ptr, png_uint_32 length)
       return 1;
    }
 }
-#endif /* PNG_READ_UNKNOWN_CHUNKS_SUPPORTED */
+#endif /* READ_UNKNOWN_CHUNKS */
 
 /* Handle an unknown, or known but disabled, chunk */
 void /* PRIVATE */
@@ -2925,7 +2925,7 @@ png_handle_unknown(png_structrp png_ptr, png_inforp info_ptr,
    png_crc_finish(png_ptr, length);
    PNG_UNUSED(info_ptr)
    PNG_UNUSED(keep)
-#endif /* !PNG_READ_UNKNOWN_CHUNKS_SUPPORTED */
+#endif /* !READ_UNKNOWN_CHUNKS */
 
    /* Check for unhandled critical chunks */
    if (!handled && PNG_CHUNK_CRITICAL(png_ptr->chunk_name))
@@ -3162,7 +3162,7 @@ png_combine_row(png_const_structrp png_ptr, png_bytep dp, int display)
           */
 #        define MASK(pass,depth,display,png)\
             ((display)?B_MASK(pass,depth,png):S_MASK(pass,depth,png))
-#endif /* !PNG_USE_COMPILE_TIME_MASKS */
+#endif /* !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
@@ -3413,7 +3413,7 @@ png_combine_row(png_const_structrp png_ptr, png_bytep dp, int display)
                      return;
                   }
                }
-#endif /* PNG_ALIGN_ code */
+#endif /* ALIGN_ code */
 
                /* The true default - use a memcpy: */
                for (;;)
@@ -3693,7 +3693,7 @@ png_do_read_interlace(png_row_infop row_info, png_bytep row, int pass,
    PNG_UNUSED(transformations)  /* Silence compiler warning */
 #endif
 }
-#endif /* PNG_READ_INTERLACING_SUPPORTED */
+#endif /* READ_INTERLACING */
 
 static void
 png_read_filter_row_sub(png_row_infop row_info, png_bytep row,
@@ -4101,7 +4101,7 @@ 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 */
+#endif /* READ_INTERLACING */
 
    png_debug(1, "in png_read_finish_row");
    png_ptr->row_number++;
@@ -4146,12 +4146,12 @@ png_read_finish_row(png_structrp png_ptr)
       if (png_ptr->pass < 7)
          return;
    }
-#endif /* PNG_READ_INTERLACING_SUPPORTED */
+#endif /* READ_INTERLACING */
 
    /* Here after at the end of the last row of the last pass. */
    png_read_finish_IDAT(png_ptr);
 }
-#endif /* PNG_SEQUENTIAL_READ_SUPPORTED */
+#endif /* SEQUENTIAL_READ */
 
 void /* PRIVATE */
 png_read_start_row(png_structrp png_ptr)
@@ -4197,7 +4197,7 @@ png_read_start_row(png_structrp png_ptr)
    }
 
    else
-#endif /* PNG_READ_INTERLACING_SUPPORTED */
+#endif /* READ_INTERLACING */
    {
       png_ptr->num_rows = png_ptr->height;
       png_ptr->iwidth = png_ptr->width;
@@ -4447,4 +4447,4 @@ defined(PNG_USER_TRANSFORM_PTR_SUPPORTED)
 
    png_ptr->flags |= PNG_FLAG_ROW_INIT;
 }
-#endif /* PNG_READ_SUPPORTED */
+#endif /* READ */
diff --git a/pngset.c b/pngset.c
index e1cb50056..e0e53e659 100644
--- a/pngset.c
+++ b/pngset.c
@@ -132,7 +132,7 @@ png_set_cHRM_XYZ(png_const_structrp png_ptr, png_inforp info_ptr, double red_X,
 }
 #  endif /* PNG_FLOATING_POINT_SUPPORTED */
 
-#endif /* PNG_cHRM_SUPPORTED */
+#endif /* cHRM */
 
 #ifdef PNG_gAMA_SUPPORTED
 void PNGFAPI
@@ -1110,7 +1110,7 @@ png_set_sPLT(png_structrp png_ptr,
    if (nentries > 0)
       png_chunk_report(png_ptr, "sPLT out of memory", PNG_CHUNK_WRITE_ERROR);
 }
-#endif /* PNG_sPLT_SUPPORTED */
+#endif /* sPLT */
 
 #ifdef PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED
 static png_byte
@@ -1606,7 +1606,7 @@ png_set_chunk_malloc_max (png_structrp png_ptr,
    if (png_ptr != NULL)
       png_ptr->user_chunk_malloc_max = user_chunk_malloc_max;
 }
-#endif /* ?PNG_SET_USER_LIMITS_SUPPORTED */
+#endif /* ?SET_USER_LIMITS */
 
 
 #ifdef PNG_BENIGN_ERRORS_SUPPORTED
@@ -1629,7 +1629,7 @@ png_set_benign_errors(png_structrp png_ptr, int allowed)
       png_ptr->flags &= ~(PNG_FLAG_BENIGN_ERRORS_WARN |
          PNG_FLAG_APP_WARNINGS_WARN | PNG_FLAG_APP_ERRORS_WARN);
 }
-#endif /* PNG_BENIGN_ERRORS_SUPPORTED */
+#endif /* BENIGN_ERRORS */
 
 #ifdef PNG_CHECK_FOR_INVALID_INDEX_SUPPORTED
    /* Whether to report invalid palette index; added at libng-1.5.10.
@@ -1652,4 +1652,4 @@ png_set_check_for_invalid_index(png_structrp png_ptr, int allowed)
       png_ptr->num_palette_max = -1;
 }
 #endif
-#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */
+#endif /* READ || WRITE */
diff --git a/pngtest.c b/pngtest.c
index bfd748f0b..cac48d79b 100644
--- a/pngtest.c
+++ b/pngtest.c
@@ -311,7 +311,7 @@ count_zero_samples(png_structp png_ptr, png_row_infop row_info, png_bytep data)
        }
     }
 }
-#endif /* PNG_WRITE_USER_TRANSFORM_SUPPORTED */
+#endif /* WRITE_USER_TRANSFORM */
 
 #ifndef PNG_STDIO_SUPPORTED
 /* START of code to validate stdio-free compilation */
@@ -420,7 +420,7 @@ pngtest_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
    pngtest_check_io_state(png_ptr, length, PNG_IO_WRITING);
 #endif
 }
-#endif /* !PNG_STDIO_SUPPORTED */
+#endif /* !STDIO */
 
 /* This function is called when there is a warning, but the library thinks
  * it can continue anyway.  Replacement functions don't have to do anything
@@ -605,7 +605,7 @@ png_debug_free(png_structp png_ptr, png_voidp ptr)
       free(ptr);
    ptr = NULL;
 }
-#endif /* PNG_USER_MEM_SUPPORTED && PNG_DEBUG */
+#endif /* USER_MEM && DEBUG */
 /* END of code to test memory allocation/deallocation */
 
 
@@ -780,7 +780,7 @@ write_chunks(png_structp write_ptr, int location)
          write_vpAg_chunk(write_ptr);
    }
 }
-#endif /* PNG_WRITE_SUPPORTED */
+#endif /* WRITE */
 #else /* !PNG_READ_USER_CHUNKS_SUPPORTED */
 #  define write_chunks(pp,loc) ((void)0)
 #endif
@@ -1290,7 +1290,7 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
          }
 
          tIME_chunk_present++;
-#endif /* PNG_TIME_RFC1123_SUPPORTED */
+#endif /* TIME_RFC1123 */
       }
    }
 #endif
@@ -1406,7 +1406,7 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
          t_encode += (t_stop - t_start);
          t_start = t_stop;
 #endif
-#endif /* PNG_WRITE_SUPPORTED */
+#endif /* WRITE */
 
 #ifndef SINGLE_ROWBUF_ALLOC
          pngtest_debug2("Freeing row buffer (pass %d, y = %u)", pass, y);
@@ -1473,7 +1473,7 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
          }
 
          tIME_chunk_present++;
-#endif /* PNG_TIME_RFC1123_SUPPORTED */
+#endif /* TIME_RFC1123 */
       }
    }
 #endif
@@ -1678,7 +1678,7 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
          }
       }
    }
-#endif /* PNG_WRITE_SUPPORTED */
+#endif /* WRITE */
 
    FCLOSE(fpin);
    FCLOSE(fpout);
@@ -1835,7 +1835,7 @@ main(int argc, char *argv[])
             fprintf(STDERR, " tIME = %s\n", tIME_string);
 
          tIME_chunk_present = 0;
-#endif /* PNG_TIME_RFC1123_SUPPORTED */
+#endif /* TIME_RFC1123 */
          }
 
          else
@@ -1924,7 +1924,7 @@ main(int argc, char *argv[])
 #ifdef PNG_TIME_RFC1123_SUPPORTED
              if (tIME_chunk_present != 0)
                 fprintf(STDERR, " tIME = %s\n", tIME_string);
-#endif /* PNG_TIME_RFC1123_SUPPORTED */
+#endif /* TIME_RFC1123 */
             }
          }
 
diff --git a/pngtrans.c b/pngtrans.c
index add42d461..3eef416ac 100644
--- a/pngtrans.c
+++ b/pngtrans.c
@@ -478,7 +478,7 @@ png_do_packswap(png_row_infop row_info, png_bytep row)
          *rp = table[*rp];
    }
 }
-#endif /* PNG_READ_PACKSWAP_SUPPORTED or PNG_WRITE_PACKSWAP_SUPPORTED */
+#endif /* READ_PACKSWAP or WRITE_PACKSWAP */
 
 #if defined(PNG_WRITE_FILLER_SUPPORTED) || \
     defined(PNG_READ_STRIP_ALPHA_SUPPORTED)
@@ -675,7 +675,7 @@ png_do_bgr(png_row_infop row_info, png_bytep row)
 #endif
    }
 }
-#endif /* PNG_READ_BGR_SUPPORTED or PNG_WRITE_BGR_SUPPORTED */
+#endif /* READ_BGR or WRITE_BGR */
 
 #if defined(PNG_READ_CHECK_FOR_INVALID_INDEX_SUPPORTED) || \
     defined(PNG_WRITE_CHECK_FOR_INVALID_INDEX_SUPPORTED)
@@ -778,7 +778,7 @@ png_do_check_palette_indexes(png_structrp png_ptr, png_row_infop row_info)
       }
    }
 }
-#endif /* PNG_CHECK_FOR_INVALID_INDEX_SUPPORTED */
+#endif /* CHECK_FOR_INVALID_INDEX */
 
 #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \
     defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
@@ -844,7 +844,7 @@ png_get_current_pass_number(png_const_structrp png_ptr)
       return png_ptr->pass;
    return 8; /* invalid */
 }
-#endif /* PNG_USER_TRANSFORM_INFO_SUPPORTED */
-#endif /* PNG_READ_USER_TRANSFORM_SUPPORTED ||
+#endif /* USER_TRANSFORM_INFO */
+#endif /* READ_USER_TRANSFORM ||
           PNG_WRITE_USER_TRANSFORM_SUPPORTED */
-#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */
+#endif /* READ || WRITE */
diff --git a/pngwio.c b/pngwio.c
index 1b525f948..71a3ef407 100644
--- a/pngwio.c
+++ b/pngwio.c
@@ -151,7 +151,7 @@ png_set_write_fn(png_structrp png_ptr, png_voidp io_ptr,
 #  endif
 #else
    PNG_UNUSED(output_flush_fn)
-#endif /* PNG_WRITE_FLUSH_SUPPORTED */
+#endif /* WRITE_FLUSH */
 
 #ifdef PNG_READ_SUPPORTED
    /* It is an error to read while writing a png file */
@@ -165,4 +165,4 @@ png_set_write_fn(png_structrp png_ptr, png_voidp io_ptr,
    }
 #endif
 }
-#endif /* PNG_WRITE_SUPPORTED */
+#endif /* WRITE */
diff --git a/pngwrite.c b/pngwrite.c
index 4ccf5119e..aba91ea79 100644
--- a/pngwrite.c
+++ b/pngwrite.c
@@ -69,7 +69,7 @@ write_unknown_chunks(png_structrp png_ptr, png_const_inforp info_ptr,
       }
    }
 }
-#endif /* PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED */
+#endif /* WRITE_UNKNOWN_CHUNKS */
 
 /* Writes all the PNG information.  This is the suggested way to use the
  * library.  If you have a new chunk to add, make a function to write it,
@@ -501,7 +501,7 @@ png_create_write_struct_2,(png_const_charp user_png_ver, png_voidp error_ptr,
 {
    png_structrp png_ptr = png_create_png_struct(user_png_ver, error_ptr,
       error_fn, warn_fn, mem_ptr, malloc_fn, free_fn);
-#endif /* PNG_USER_MEM_SUPPORTED */
+#endif /* USER_MEM */
 
    if (png_ptr != NULL)
    {
@@ -526,7 +526,7 @@ png_create_write_struct_2,(png_const_charp user_png_ver, png_voidp error_ptr,
       png_ptr->zlib_text_mem_level = 8;
       png_ptr->zlib_text_window_bits = 15;
       png_ptr->zlib_text_method = 8;
-#endif /* PNG_WRITE_COMPRESSED_TEXT_SUPPORTED */
+#endif /* WRITE_COMPRESSED_TEXT */
 
       /* This is a highly dubious configuration option; by default it is off,
        * but it may be appropriate for private builds that are testing
@@ -676,10 +676,10 @@ png_do_write_intrapixel(png_row_infop row_info, png_bytep row)
             *(rp + 5) = (png_byte)(blue & 0xff);
          }
       }
-#endif /* PNG_WRITE_16BIT_SUPPORTED */
+#endif /* WRITE_16BIT */
    }
 }
-#endif /* PNG_MNG_FEATURES_SUPPORTED */
+#endif /* MNG_FEATURES */
 
 /* Called by user to write a row of image data */
 void PNGAPI
@@ -920,7 +920,7 @@ png_write_flush(png_structrp png_ptr)
    png_ptr->flush_rows = 0;
    png_flush(png_ptr);
 }
-#endif /* PNG_WRITE_FLUSH_SUPPORTED */
+#endif /* WRITE_FLUSH */
 
 #ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
 static void png_reset_filter_heuristics(png_structrp png_ptr);/* forward decl */
@@ -1352,7 +1352,7 @@ png_set_filter_heuristics_fixed(png_structrp png_ptr, int heuristic_method,
    }
 }
 #endif /* FIXED_POINT */
-#endif /* PNG_WRITE_WEIGHTED_FILTER_SUPPORTED */
+#endif /* WRITE_WEIGHTED_FILTER */
 
 void PNGAPI
 png_set_compression_level(png_structrp png_ptr, int level)
@@ -1509,7 +1509,7 @@ png_set_text_compression_method(png_structrp png_ptr, int method)
 
    png_ptr->zlib_text_method = method;
 }
-#endif /* PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED */
+#endif /* WRITE_CUSTOMIZE_ZTXT_COMPRESSION */
 /* end of API added to libpng-1.5.4 */
 
 void PNGAPI
@@ -2430,6 +2430,6 @@ png_image_write_to_file(png_imagep image, const char *file_name,
    else
       return 0;
 }
-#endif /* PNG_STDIO_SUPPORTED */
+#endif /* STDIO */
 #endif /* SIMPLIFIED_WRITE */
-#endif /* PNG_WRITE_SUPPORTED */
+#endif /* WRITE */
diff --git a/pngwtran.c b/pngwtran.c
index 6971d046a..e4e691374 100644
--- a/pngwtran.c
+++ b/pngwtran.c
@@ -353,7 +353,7 @@ png_do_write_swap_alpha(png_row_infop row_info, png_bytep row)
                *(dp++) = save[1];
             }
          }
-#endif /* PNG_WRITE_16BIT_SUPPORTED */
+#endif /* WRITE_16BIT */
       }
 
       else if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
@@ -392,7 +392,7 @@ png_do_write_swap_alpha(png_row_infop row_info, png_bytep row)
                *(dp++) = save[1];
             }
          }
-#endif /* PNG_WRITE_16BIT_SUPPORTED */
+#endif /* WRITE_16BIT */
       }
    }
 }
@@ -449,7 +449,7 @@ png_do_write_invert_alpha(png_row_infop row_info, png_bytep row)
                *(dp++) = (png_byte)(255 - *(sp++));
             }
          }
-#endif /* PNG_WRITE_16BIT_SUPPORTED */
+#endif /* WRITE_16BIT */
       }
 
       else if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
@@ -487,7 +487,7 @@ png_do_write_invert_alpha(png_row_infop row_info, png_bytep row)
                *(dp++) = (png_byte)(255 - *(sp++));
             }
          }
-#endif /* PNG_WRITE_16BIT_SUPPORTED */
+#endif /* WRITE_16BIT */
       }
    }
 }
@@ -570,5 +570,5 @@ png_do_write_transformations(png_structrp png_ptr, png_row_infop row_info)
       png_do_invert(row_info, png_ptr->row_buf + 1);
 #endif
 }
-#endif /* PNG_WRITE_TRANSFORMS_SUPPORTED */
-#endif /* PNG_WRITE_SUPPORTED */
+#endif /* WRITE_TRANSFORMS */
+#endif /* WRITE */
diff --git a/pngwutil.c b/pngwutil.c
index 7f4e0fa08..e6386c0a4 100644
--- a/pngwutil.c
+++ b/pngwutil.c
@@ -286,7 +286,7 @@ optimize_cmf(png_bytep data, png_alloc_size_t data_size)
       }
    }
 }
-#endif /* PNG_WRITE_OPTIMIZE_CMF_SUPPORTED */
+#endif /* WRITE_OPTIMIZE_CMF */
 
 /* Initialize the compressor for the appropriate type of compression. */
 static int
@@ -663,7 +663,7 @@ png_write_compressed_data_out(png_structrp png_ptr, compression_state *comp)
    if (output_len > 0)
       png_error(png_ptr, "error writing ancillary chunked compressed data");
 }
-#endif /* PNG_WRITE_COMPRESSED_TEXT_SUPPORTED */
+#endif /* WRITE_COMPRESSED_TEXT */
 
 #if defined(PNG_WRITE_TEXT_SUPPORTED) || defined(PNG_WRITE_pCAL_SUPPORTED) || \
     defined(PNG_WRITE_iCCP_SUPPORTED) || defined(PNG_WRITE_sPLT_SUPPORTED)
@@ -743,7 +743,7 @@ png_check_keyword(png_structrp png_ptr, png_const_charp key, png_bytep new_key)
 
       png_formatted_warning(png_ptr, p, "keyword \"@1\": bad character '0x@2'");
    }
-#endif /* PNG_WARNINGS_SUPPORTED */
+#endif /* WARNINGS */
 
    return key_len;
 }
@@ -1979,7 +1979,7 @@ png_write_alloc_filter_row_buffers(png_structrp png_ptr, int filters)
       png_ptr->paeth_row[0] = PNG_FILTER_VALUE_PAETH;
    }
 }
-#endif /* PNG_WRITE_FILTER_SUPPORTED */
+#endif /* WRITE_FILTER */
 
 /* Initializes the row writing capability of libpng */
 void /* PRIVATE */
@@ -2049,7 +2049,7 @@ png_write_start_row(png_structrp png_ptr)
    png_ptr->do_filter = (png_byte)filters; /* in case it was changed above */
 #else
    png_ptr->do_filter = PNG_FILTER_NONE;
-#endif /* PNG_WRITE_FILTER_SUPPORTED */
+#endif /* WRITE_FILTER */
 
 #ifdef PNG_WRITE_INTERLACING_SUPPORTED
    /* If interlaced, we need to set up width and height of pass */
@@ -2952,7 +2952,7 @@ png_write_find_filter(png_structrp png_ptr, png_row_infop row_info)
 
          else
             p = c;
-#endif /* PNG_SLOW_PAETH */
+#endif /* SLOW_PAETH */
 
          v = *dp++ = (png_byte)(((int)*rp++ - p) & 0xff);
 
@@ -3001,7 +3001,7 @@ png_write_find_filter(png_structrp png_ptr, png_row_infop row_info)
          best_row = png_ptr->paeth_row;
       }
    }
-#endif /* PNG_WRITE_FILTER_SUPPORTED */
+#endif /* WRITE_FILTER */
 
    /* Do the actual writing of the filtered row data from the chosen filter. */
    png_write_filtered_row(png_ptr, best_row, row_info->rowbytes+1);
@@ -3021,7 +3021,7 @@ png_write_find_filter(png_structrp png_ptr, png_row_infop row_info)
       png_ptr->prev_filters[j] = best_row[0];
    }
 #endif
-#endif /* PNG_WRITE_FILTER_SUPPORTED */
+#endif /* WRITE_FILTER */
 }
 
 
@@ -3046,7 +3046,7 @@ png_write_filtered_row(png_structrp png_ptr, png_bytep filtered_row,
       png_ptr->prev_row = png_ptr->row_buf;
       png_ptr->row_buf = tptr;
    }
-#endif /* PNG_WRITE_FILTER_SUPPORTED */
+#endif /* WRITE_FILTER */
 
    /* Finish row - updates counters and flushes zlib if last row */
    png_write_finish_row(png_ptr);
@@ -3061,4 +3061,4 @@ png_write_filtered_row(png_structrp png_ptr, png_bytep filtered_row,
    }
 #endif
 }
-#endif /* PNG_WRITE_SUPPORTED */
+#endif /* WRITE */