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libpng/CMakeLists.txt
Simon Hausmann 6842c58adc Fix CMake build with Emscripten 
When building with Emscripten, linkage to libm is neither required
nor working. As find_library will fail, M_LIBRARY will be set to
NOTFOUND and the build would fail later. The build works just fine
without libm linkage.
2020-05-17 20:13:17 -04:00

935 lines
33 KiB
CMake
Raw Blame History

# CMakeLists.txt
# Copyright (c) 2018-2020 Cosmin Truta
# Copyright (c) 2007,2009-2018 Glenn Randers-Pehrson
# Written by Christian Ehrlicher, 2007
# Revised by Roger Lowman, 2009-2010
# Revised by Clifford Yapp, 2011-2012,2017
# Revised by Roger Leigh, 2016
# Revised by Andreas Franek, 2016
# Revised by Sam Serrels, 2017
# Revised by Vadim Barkov, 2017
# Revised by Vicky Pfau, 2018
# Revised by Cameron Cawley, 2018
# Revised by Cosmin Truta, 2018
# Revised by Kyle Bentley, 2018
# Revised by David Callu, 2020
# Revised by Steve Robinson, 2020
# Revised by Simon Hausmann, 2020
# This code is released under the libpng license.
# For conditions of distribution and use, see the disclaimer
# and license in png.h
cmake_minimum_required(VERSION 3.1)
cmake_policy(VERSION 3.1)
project(libpng C ASM)
enable_testing()
set(PNGLIB_MAJOR 1)
set(PNGLIB_MINOR 6)
set(PNGLIB_RELEASE 38)
set(PNGLIB_NAME libpng${PNGLIB_MAJOR}${PNGLIB_MINOR})
set(PNGLIB_VERSION ${PNGLIB_MAJOR}.${PNGLIB_MINOR}.${PNGLIB_RELEASE})
include(GNUInstallDirs)
# needed packages
# Allow users to specify location of Zlib.
# Useful if zlib is being built alongside this as a sub-project.
option(PNG_BUILD_ZLIB "Custom zlib Location, else find_package is used" OFF)
if(NOT PNG_BUILD_ZLIB)
find_package(ZLIB REQUIRED)
include_directories(${ZLIB_INCLUDE_DIRS})
endif()
if(UNIX AND NOT APPLE AND NOT BEOS AND NOT HAIKU AND NOT EMSCRIPTEN)
find_library(M_LIBRARY m)
else()
# libm is not needed and/or not available
set(M_LIBRARY "")
endif()
# COMMAND LINE OPTIONS
option(PNG_SHARED "Build shared lib" ON)
option(PNG_STATIC "Build static lib" ON)
option(PNG_TESTS "Build libpng tests" ON)
# Many more configuration options could be added here
option(PNG_FRAMEWORK "Build OS X framework" OFF)
option(PNG_DEBUG "Build with debug output" OFF)
option(PNG_HARDWARE_OPTIMIZATIONS "Enable hardware optimizations" ON)
set(PNG_PREFIX "" CACHE STRING "Prefix to add to the API function names")
set(DFA_XTRA "" CACHE FILEPATH "File containing extra configuration settings")
if(PNG_HARDWARE_OPTIMIZATIONS)
# set definitions and sources for arm
if(CMAKE_SYSTEM_PROCESSOR MATCHES "^arm" OR
CMAKE_SYSTEM_PROCESSOR MATCHES "^aarch64")
set(PNG_ARM_NEON_POSSIBLE_VALUES check on off)
set(PNG_ARM_NEON "check" CACHE STRING "Enable ARM NEON optimizations:
check: (default) use internal checking code;
off: disable the optimizations;
on: turn on unconditionally.")
set_property(CACHE PNG_ARM_NEON PROPERTY STRINGS
${PNG_ARM_NEON_POSSIBLE_VALUES})
list(FIND PNG_ARM_NEON_POSSIBLE_VALUES ${PNG_ARM_NEON} index)
if(index EQUAL -1)
message(FATAL_ERROR
"PNG_ARM_NEON must be one of [${PNG_ARM_NEON_POSSIBLE_VALUES}]")
elseif(NOT ${PNG_ARM_NEON} STREQUAL "off")
set(libpng_arm_sources
arm/arm_init.c
arm/filter_neon.S
arm/filter_neon_intrinsics.c
arm/palette_neon_intrinsics.c)
if(${PNG_ARM_NEON} STREQUAL "on")
add_definitions(-DPNG_ARM_NEON_OPT=2)
elseif(${PNG_ARM_NEON} STREQUAL "check")
add_definitions(-DPNG_ARM_NEON_CHECK_SUPPORTED)
endif()
else()
add_definitions(-DPNG_ARM_NEON_OPT=0)
endif()
endif()
# set definitions and sources for powerpc
if(CMAKE_SYSTEM_PROCESSOR MATCHES "^powerpc*" OR
CMAKE_SYSTEM_PROCESSOR MATCHES "^ppc64*")
set(PNG_POWERPC_VSX_POSSIBLE_VALUES on off)
set(PNG_POWERPC_VSX "on" CACHE STRING "Enable POWERPC VSX optimizations:
off: disable the optimizations.")
set_property(CACHE PNG_POWERPC_VSX PROPERTY STRINGS
${PNG_POWERPC_VSX_POSSIBLE_VALUES})
list(FIND PNG_POWERPC_VSX_POSSIBLE_VALUES ${PNG_POWERPC_VSX} index)
if(index EQUAL -1)
message(FATAL_ERROR
"PNG_POWERPC_VSX must be one of [${PNG_POWERPC_VSX_POSSIBLE_VALUES}]")
elseif(NOT ${PNG_POWERPC_VSX} STREQUAL "off")
set(libpng_powerpc_sources
powerpc/powerpc_init.c
powerpc/filter_vsx_intrinsics.c)
if(${PNG_POWERPC_VSX} STREQUAL "on")
add_definitions(-DPNG_POWERPC_VSX_OPT=2)
endif()
else()
add_definitions(-DPNG_POWERPC_VSX_OPT=0)
endif()
endif()
# set definitions and sources for intel
if(CMAKE_SYSTEM_PROCESSOR MATCHES "^i?86" OR
CMAKE_SYSTEM_PROCESSOR MATCHES "^x86_64*")
set(PNG_INTEL_SSE_POSSIBLE_VALUES on off)
set(PNG_INTEL_SSE "on" CACHE STRING "Enable INTEL_SSE optimizations:
off: disable the optimizations")
set_property(CACHE PNG_INTEL_SSE PROPERTY STRINGS
${PNG_INTEL_SSE_POSSIBLE_VALUES})
list(FIND PNG_INTEL_SSE_POSSIBLE_VALUES ${PNG_INTEL_SSE} index)
if(index EQUAL -1)
message(FATAL_ERROR
"PNG_INTEL_SSE must be one of [${PNG_INTEL_SSE_POSSIBLE_VALUES}]")
elseif(NOT ${PNG_INTEL_SSE} STREQUAL "off")
set(libpng_intel_sources
intel/intel_init.c
intel/filter_sse2_intrinsics.c)
if(${PNG_INTEL_SSE} STREQUAL "on")
add_definitions(-DPNG_INTEL_SSE_OPT=1)
endif()
else()
add_definitions(-DPNG_INTEL_SSE_OPT=0)
endif()
endif()
# set definitions and sources for MIPS
if(CMAKE_SYSTEM_PROCESSOR MATCHES "mipsel*" OR
CMAKE_SYSTEM_PROCESSOR MATCHES "mips64el*")
set(PNG_MIPS_MSA_POSSIBLE_VALUES on off)
set(PNG_MIPS_MSA "on" CACHE STRING "Enable MIPS_MSA optimizations:
off: disable the optimizations")
set_property(CACHE PNG_MIPS_MSA PROPERTY STRINGS
${PNG_MIPS_MSA_POSSIBLE_VALUES})
list(FIND PNG_MIPS_MSA_POSSIBLE_VALUES ${PNG_MIPS_MSA} index)
if(index EQUAL -1)
message(FATAL_ERROR
"PNG_MIPS_MSA must be one of [${PNG_MIPS_MSA_POSSIBLE_VALUES}]")
elseif(NOT ${PNG_MIPS_MSA} STREQUAL "off")
set(libpng_mips_sources
mips/mips_init.c
mips/filter_msa_intrinsics.c)
if(${PNG_MIPS_MSA} STREQUAL "on")
add_definitions(-DPNG_MIPS_MSA_OPT=2)
endif()
else()
add_definitions(-DPNG_MIPS_MSA_OPT=0)
endif()
endif()
else(PNG_HARDWARE_OPTIMIZATIONS)
# set definitions and sources for arm
if(CMAKE_SYSTEM_PROCESSOR MATCHES "^arm" OR
CMAKE_SYSTEM_PROCESSOR MATCHES "^aarch64")
add_definitions(-DPNG_ARM_NEON_OPT=0)
endif()
# set definitions and sources for powerpc
if(CMAKE_SYSTEM_PROCESSOR MATCHES "^powerpc*" OR
CMAKE_SYSTEM_PROCESSOR MATCHES "^ppc64*")
add_definitions(-DPNG_POWERPC_VSX_OPT=0)
endif()
# set definitions and sources for intel
if(CMAKE_SYSTEM_PROCESSOR MATCHES "^i?86" OR
CMAKE_SYSTEM_PROCESSOR MATCHES "^x86_64*")
add_definitions(-DPNG_INTEL_SSE_OPT=0)
endif()
# set definitions and sources for MIPS
if(CMAKE_SYSTEM_PROCESSOR MATCHES "mipsel*" OR
CMAKE_SYSTEM_PROCESSOR MATCHES "mips64el*")
add_definitions(-DPNG_MIPS_MSA_OPT=0)
endif()
endif(PNG_HARDWARE_OPTIMIZATIONS)
# SET LIBNAME
set(PNG_LIB_NAME png${PNGLIB_MAJOR}${PNGLIB_MINOR})
# to distinguish between debug and release lib
set(CMAKE_DEBUG_POSTFIX "d")
include(CheckCSourceCompiles)
option(ld-version-script "Enable linker version script" ON)
if(ld-version-script AND NOT APPLE)
# Check if LD supports linker scripts.
file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/conftest.map" "VERS_1 {
global: sym;
local: *;
};
VERS_2 {
global: sym2;
main;
} VERS_1;
")
set(CMAKE_REQUIRED_FLAGS_SAVE ${CMAKE_REQUIRED_FLAGS})
set(CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS} "-Wl,--version-script='${CMAKE_CURRENT_BINARY_DIR}/conftest.map'")
check_c_source_compiles("void sym(void) {}
void sym2(void) {}
int main(void) {return 0;}
" HAVE_LD_VERSION_SCRIPT)
if(NOT HAVE_LD_VERSION_SCRIPT)
set(CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS_SAVE} "-Wl,-M -Wl,${CMAKE_CURRENT_BINARY_DIR}/conftest.map")
check_c_source_compiles("void sym(void) {}
void sym2(void) {}
int main(void) {return 0;}
" HAVE_SOLARIS_LD_VERSION_SCRIPT)
endif()
set(CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS_SAVE})
file(REMOVE "${CMAKE_CURRENT_BINARY_DIR}/conftest.map")
endif()
# Find symbol prefix. Likely obsolete and unnecessary with recent
# toolchains (it's not done in many other projects).
function(symbol_prefix)
set(SYMBOL_PREFIX)
execute_process(COMMAND "${CMAKE_C_COMPILER}" "-E" "-"
INPUT_FILE /dev/null
OUTPUT_VARIABLE OUT
RESULT_VARIABLE STATUS)
if(CPP_FAIL)
message(WARNING "Failed to run the C preprocessor")
endif()
string(REPLACE "\n" ";" OUT "${OUT}")
foreach(line ${OUT})
string(REGEX MATCH "^PREFIX=" found_match "${line}")
if(found_match)
string(REGEX REPLACE "^PREFIX=(.*\)" "\\1" prefix "${line}")
string(REGEX MATCH "__USER_LABEL_PREFIX__" found_match "${prefix}")
if(found_match)
string(REGEX REPLACE "(.*)__USER_LABEL_PREFIX__(.*)" "\\1\\2" prefix "${prefix}")
endif()
set(SYMBOL_PREFIX "${prefix}")
endif()
endforeach()
message(STATUS "Symbol prefix: ${SYMBOL_PREFIX}")
set(SYMBOL_PREFIX "${SYMBOL_PREFIX}" PARENT_SCOPE)
endfunction()
if(UNIX)
symbol_prefix()
endif()
find_program(AWK NAMES gawk awk)
include_directories(${CMAKE_CURRENT_BINARY_DIR})
if(NOT AWK OR ANDROID OR IOS)
# No awk available to generate sources; use pre-built pnglibconf.h
configure_file(${CMAKE_CURRENT_SOURCE_DIR}/scripts/pnglibconf.h.prebuilt
${CMAKE_CURRENT_BINARY_DIR}/pnglibconf.h)
add_custom_target(genfiles) # Dummy
else()
include(CMakeParseArguments)
# Generate .chk from .out with awk
# generate_chk(INPUT inputfile OUTPUT outputfile [DEPENDS dep1 [dep2...]])
function(generate_chk)
set(options)
set(oneValueArgs INPUT OUTPUT)
set(multiValueArgs DEPENDS)
cmake_parse_arguments(_GC "${options}" "${oneValueArgs}" "${multiValueArgs}" ${ARGN})
if(NOT _GC_INPUT)
message(FATAL_ERROR "generate_chk: Missing INPUT argument")
endif()
if(NOT _GC_OUTPUT)
message(FATAL_ERROR "generate_chk: Missing OUTPUT argument")
endif()
add_custom_command(OUTPUT "${_GC_OUTPUT}"
COMMAND "${CMAKE_COMMAND}"
"-DINPUT=${_GC_INPUT}"
"-DOUTPUT=${_GC_OUTPUT}"
-P "${CMAKE_CURRENT_BINARY_DIR}/scripts/genchk.cmake"
DEPENDS "${_GC_INPUT}" ${_GC_DEPENDS}
WORKING_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}")
endfunction()
# Generate .out from .c with awk
# generate_out(INPUT inputfile OUTPUT outputfile [DEPENDS dep1 [dep2...]])
function(generate_out)
set(options)
set(oneValueArgs INPUT OUTPUT)
set(multiValueArgs DEPENDS)
cmake_parse_arguments(_GO "${options}" "${oneValueArgs}" "${multiValueArgs}" ${ARGN})
if(NOT _GO_INPUT)
message(FATAL_ERROR "generate_out: Missing INPUT argument")
endif()
if(NOT _GO_OUTPUT)
message(FATAL_ERROR "generate_out: Missing OUTPUT argument")
endif()
add_custom_command(OUTPUT "${_GO_OUTPUT}"
COMMAND "${CMAKE_COMMAND}"
"-DINPUT=${_GO_INPUT}"
"-DOUTPUT=${_GO_OUTPUT}"
-P "${CMAKE_CURRENT_BINARY_DIR}/scripts/genout.cmake"
DEPENDS "${_GO_INPUT}" ${_GO_DEPENDS}
WORKING_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}")
endfunction()
# Generate specific source file with awk
# generate_source(OUTPUT outputfile [DEPENDS dep1 [dep2...]])
function(generate_source)
set(options)
set(oneValueArgs OUTPUT)
set(multiValueArgs DEPENDS)
cmake_parse_arguments(_GSO "${options}" "${oneValueArgs}" "${multiValueArgs}" ${ARGN})
if(NOT _GSO_OUTPUT)
message(FATAL_ERROR "generate_source: Missing OUTPUT argument")
endif()
add_custom_command(OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/${_GSO_OUTPUT}"
COMMAND "${CMAKE_COMMAND}"
"-DOUTPUT=${_GSO_OUTPUT}"
-P "${CMAKE_CURRENT_BINARY_DIR}/scripts/gensrc.cmake"
DEPENDS ${_GSO_DEPENDS}
WORKING_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}")
endfunction()
# Copy file
function(generate_copy source destination)
add_custom_command(OUTPUT "${destination}"
COMMAND "${CMAKE_COMMAND}" -E remove "${destination}"
COMMAND "${CMAKE_COMMAND}" -E copy "${source}"
"${destination}"
DEPENDS "${source}")
endfunction()
# Generate scripts/pnglibconf.h
generate_source(OUTPUT "scripts/pnglibconf.c"
DEPENDS "${CMAKE_CURRENT_SOURCE_DIR}/scripts/pnglibconf.dfa"
"${CMAKE_CURRENT_SOURCE_DIR}/scripts/options.awk"
"${CMAKE_CURRENT_SOURCE_DIR}/pngconf.h")
# Generate pnglibconf.c
generate_source(OUTPUT "pnglibconf.c"
DEPENDS "${CMAKE_CURRENT_SOURCE_DIR}/scripts/pnglibconf.dfa"
"${CMAKE_CURRENT_SOURCE_DIR}/scripts/options.awk"
"${CMAKE_CURRENT_SOURCE_DIR}/pngconf.h")
if(PNG_PREFIX)
set(PNGLIBCONF_H_EXTRA_DEPENDS
"${CMAKE_CURRENT_BINARY_DIR}/scripts/prefix.out"
"${CMAKE_CURRENT_SOURCE_DIR}/scripts/macro.lst")
set(PNGPREFIX_H_EXTRA_DEPENDS
"${CMAKE_CURRENT_BINARY_DIR}/scripts/intprefix.out")
endif()
generate_out(INPUT "${CMAKE_CURRENT_BINARY_DIR}/pnglibconf.c"
OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/pnglibconf.out")
# Generate pnglibconf.h
generate_source(OUTPUT "pnglibconf.h"
DEPENDS "${CMAKE_CURRENT_BINARY_DIR}/pnglibconf.out"
${PNGLIBCONF_H_EXTRA_DEPENDS})
generate_out(INPUT "${CMAKE_CURRENT_SOURCE_DIR}/scripts/intprefix.c"
OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/scripts/intprefix.out"
DEPENDS "${CMAKE_CURRENT_BINARY_DIR}/pnglibconf.h")
generate_out(INPUT "${CMAKE_CURRENT_SOURCE_DIR}/scripts/prefix.c"
OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/scripts/prefix.out"
DEPENDS "${CMAKE_CURRENT_SOURCE_DIR}/png.h"
"${CMAKE_CURRENT_SOURCE_DIR}/pngconf.h"
"${CMAKE_CURRENT_BINARY_DIR}/pnglibconf.out")
# Generate pngprefix.h
generate_source(OUTPUT "pngprefix.h"
DEPENDS ${PNGPREFIX_H_EXTRA_DEPENDS})
generate_out(INPUT "${CMAKE_CURRENT_SOURCE_DIR}/scripts/sym.c"
OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/scripts/sym.out"
DEPENDS "${CMAKE_CURRENT_BINARY_DIR}/pnglibconf.h")
generate_out(INPUT "${CMAKE_CURRENT_SOURCE_DIR}/scripts/symbols.c"
OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/scripts/symbols.out"
DEPENDS "${CMAKE_CURRENT_SOURCE_DIR}/png.h"
"${CMAKE_CURRENT_SOURCE_DIR}/pngconf.h"
"${CMAKE_CURRENT_SOURCE_DIR}/scripts/pnglibconf.h.prebuilt")
generate_out(INPUT "${CMAKE_CURRENT_SOURCE_DIR}/scripts/vers.c"
OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/scripts/vers.out"
DEPENDS "${CMAKE_CURRENT_SOURCE_DIR}/png.h"
"${CMAKE_CURRENT_SOURCE_DIR}/pngconf.h"
"${CMAKE_CURRENT_BINARY_DIR}/pnglibconf.h")
generate_chk(INPUT "${CMAKE_CURRENT_BINARY_DIR}/scripts/symbols.out"
OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/scripts/symbols.chk"
DEPENDS "${CMAKE_CURRENT_SOURCE_DIR}/scripts/checksym.awk"
"${CMAKE_CURRENT_SOURCE_DIR}/scripts/symbols.def")
add_custom_target(symbol-check DEPENDS
"${CMAKE_CURRENT_BINARY_DIR}/scripts/symbols.chk")
generate_copy("${CMAKE_CURRENT_BINARY_DIR}/scripts/sym.out"
"${CMAKE_CURRENT_BINARY_DIR}/libpng.sym")
generate_copy("${CMAKE_CURRENT_BINARY_DIR}/scripts/vers.out"
"${CMAKE_CURRENT_BINARY_DIR}/libpng.vers")
add_custom_target(genvers DEPENDS "${CMAKE_CURRENT_BINARY_DIR}/libpng.vers")
add_custom_target(gensym DEPENDS "${CMAKE_CURRENT_BINARY_DIR}/libpng.sym")
add_custom_target("genprebuilt"
COMMAND "${CMAKE_COMMAND}"
"-DOUTPUT=scripts/pnglibconf.h.prebuilt"
-P "${CMAKE_CURRENT_BINARY_DIR}/scripts/gensrc.cmake"
WORKING_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}")
# A single target handles generation of all generated files. If
# they are depended upon separately by multiple targets, this
# confuses parallel make (it would require a separate top-level
# target for each file to track the dependencies properly).
add_custom_target(genfiles DEPENDS
"${CMAKE_CURRENT_BINARY_DIR}/libpng.sym"
"${CMAKE_CURRENT_BINARY_DIR}/libpng.vers"
"${CMAKE_CURRENT_BINARY_DIR}/pnglibconf.c"
"${CMAKE_CURRENT_BINARY_DIR}/pnglibconf.h"
"${CMAKE_CURRENT_BINARY_DIR}/pnglibconf.out"
"${CMAKE_CURRENT_BINARY_DIR}/pngprefix.h"
"${CMAKE_CURRENT_BINARY_DIR}/scripts/intprefix.out"
"${CMAKE_CURRENT_BINARY_DIR}/scripts/pnglibconf.c"
"${CMAKE_CURRENT_BINARY_DIR}/scripts/prefix.out"
"${CMAKE_CURRENT_BINARY_DIR}/scripts/sym.out"
"${CMAKE_CURRENT_BINARY_DIR}/scripts/symbols.chk"
"${CMAKE_CURRENT_BINARY_DIR}/scripts/symbols.out"
"${CMAKE_CURRENT_BINARY_DIR}/scripts/vers.out")
endif(NOT AWK OR ANDROID OR IOS)
# OUR SOURCES
set(libpng_public_hdrs
png.h
pngconf.h
"${CMAKE_CURRENT_BINARY_DIR}/pnglibconf.h"
)
set(libpng_private_hdrs
pngpriv.h
pngdebug.h
pnginfo.h
pngstruct.h
)
if(AWK AND NOT ANDROID AND NOT IOS)
list(APPEND libpng_private_hdrs "${CMAKE_CURRENT_BINARY_DIR}/pngprefix.h")
endif()
set(libpng_sources
${libpng_public_hdrs}
${libpng_private_hdrs}
png.c
pngerror.c
pngget.c
pngmem.c
pngpread.c
pngread.c
pngrio.c
pngrtran.c
pngrutil.c
pngset.c
pngtrans.c
pngwio.c
pngwrite.c
pngwtran.c
pngwutil.c
${libpng_arm_sources}
${libpng_intel_sources}
${libpng_mips_sources}
${libpng_powerpc_sources}
)
set(pngtest_sources
pngtest.c
)
set(pngvalid_sources
contrib/libtests/pngvalid.c
)
set(pngstest_sources
contrib/libtests/pngstest.c
)
set(pngunknown_sources
contrib/libtests/pngunknown.c
)
set(pngimage_sources
contrib/libtests/pngimage.c
)
set(pngfix_sources
contrib/tools/pngfix.c
)
set(png_fix_itxt_sources
contrib/tools/png-fix-itxt.c
)
if(MSVC)
add_definitions(-D_CRT_SECURE_NO_DEPRECATE)
endif()
if(PNG_DEBUG)
add_definitions(-DPNG_DEBUG)
endif()
# NOW BUILD OUR TARGET
include_directories(${CMAKE_CURRENT_SOURCE_DIR} ${ZLIB_INCLUDE_DIRS})
unset(PNG_LIB_TARGETS)
if(PNG_SHARED)
add_library(png SHARED ${libpng_sources})
set(PNG_LIB_TARGETS png)
set_target_properties(png PROPERTIES OUTPUT_NAME ${PNG_LIB_NAME})
add_dependencies(png genfiles)
if(MSVC)
# msvc does not append 'lib' - do it here to have consistent name
set_target_properties(png PROPERTIES PREFIX "lib")
set_target_properties(png PROPERTIES IMPORT_PREFIX "lib")
endif()
target_link_libraries(png ${ZLIB_LIBRARIES} ${M_LIBRARY})
if(UNIX AND AWK)
if(HAVE_LD_VERSION_SCRIPT)
set_target_properties(png PROPERTIES LINK_FLAGS
"-Wl,--version-script='${CMAKE_CURRENT_BINARY_DIR}/libpng.vers'")
elseif(HAVE_SOLARIS_LD_VERSION_SCRIPT)
set_target_properties(png PROPERTIES LINK_FLAGS
"-Wl,-M -Wl,'${CMAKE_CURRENT_BINARY_DIR}/libpng.vers'")
endif()
endif()
endif()
if(PNG_STATIC)
# does not work without changing name
set(PNG_LIB_NAME_STATIC png_static)
add_library(png_static STATIC ${libpng_sources})
add_dependencies(png_static genfiles)
# MSVC doesn't use a different file extension for shared vs. static
# libs. We are able to change OUTPUT_NAME to remove the _static
# for all other platforms.
if(NOT MSVC)
set_target_properties(png_static PROPERTIES
OUTPUT_NAME "${PNG_LIB_NAME}"
CLEAN_DIRECT_OUTPUT 1)
else()
set_target_properties(png_static PROPERTIES
OUTPUT_NAME "${PNG_LIB_NAME}_static"
CLEAN_DIRECT_OUTPUT 1)
endif()
list(APPEND PNG_LIB_TARGETS png_static)
if(MSVC)
# msvc does not append 'lib' - do it here to have consistent name
set_target_properties(png_static PROPERTIES PREFIX "lib")
endif()
target_link_libraries(png_static ${ZLIB_LIBRARIES} ${M_LIBRARY})
endif()
if(PNG_FRAMEWORK)
set(PNG_LIB_NAME_FRAMEWORK png_framework)
add_library(png_framework SHARED ${libpng_sources})
add_dependencies(png_framework genfiles)
list(APPEND PNG_LIB_TARGETS png_framework)
set_target_properties(png_framework PROPERTIES
FRAMEWORK TRUE
FRAMEWORK_VERSION ${PNGLIB_VERSION}
MACOSX_FRAMEWORK_SHORT_VERSION_STRING ${PNGLIB_MAJOR}.${PNGLIB_MINOR}
MACOSX_FRAMEWORK_BUNDLE_VERSION ${PNGLIB_VERSION}
MACOSX_FRAMEWORK_IDENTIFIER org.libpng.libpng
XCODE_ATTRIBUTE_INSTALL_PATH "@rpath"
PUBLIC_HEADER "${libpng_public_hdrs}"
OUTPUT_NAME png)
target_link_libraries(png_framework ${ZLIB_LIBRARIES} ${M_LIBRARY})
endif()
if(NOT PNG_LIB_TARGETS)
message(SEND_ERROR
"No library variant selected to build. "
"Please enable at least one of the following options: "
"PNG_STATIC, PNG_SHARED, PNG_FRAMEWORK")
endif()
if(PNG_SHARED AND WIN32)
set_target_properties(png PROPERTIES DEFINE_SYMBOL PNG_BUILD_DLL)
endif()
function(png_add_test)
set(options)
set(oneValueArgs NAME COMMAND)
set(multiValueArgs OPTIONS FILES)
cmake_parse_arguments(_PAT "${options}" "${oneValueArgs}" "${multiValueArgs}" ${ARGN})
if(NOT _PAT_NAME)
message(FATAL_ERROR "png_add_test: Missing NAME argument")
endif()
if(NOT _PAT_COMMAND)
message(FATAL_ERROR "png_add_test: Missing COMMAND argument")
endif()
set(TEST_OPTIONS "${_PAT_OPTIONS}")
set(TEST_FILES "${_PAT_FILES}")
configure_file("${CMAKE_CURRENT_SOURCE_DIR}/scripts/test.cmake.in"
"${CMAKE_CURRENT_BINARY_DIR}/tests/${_PAT_NAME}.cmake" @ONLY)
add_test(NAME "${_PAT_NAME}"
COMMAND "${CMAKE_COMMAND}"
"-DLIBPNG=$<TARGET_FILE:png>"
"-DTEST_COMMAND=$<TARGET_FILE:${_PAT_COMMAND}>"
-P "${CMAKE_CURRENT_BINARY_DIR}/tests/${_PAT_NAME}.cmake")
endfunction()
if(PNG_TESTS AND PNG_SHARED)
# Find test PNG files by globbing, but sort lists to ensure
# consistency between different filesystems.
file(GLOB PNGSUITE_PNGS "${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/*.png")
list(SORT PNGSUITE_PNGS)
file(GLOB TEST_PNGS "${CMAKE_CURRENT_SOURCE_DIR}/contrib/testpngs/*.png")
list(SORT TEST_PNGS)
set(PNGTEST_PNG "${CMAKE_CURRENT_SOURCE_DIR}/pngtest.png")
add_executable(pngtest ${pngtest_sources})
target_link_libraries(pngtest png)
png_add_test(NAME pngtest COMMAND pngtest FILES "${PNGTEST_PNG}")
add_executable(pngvalid ${pngvalid_sources})
target_link_libraries(pngvalid png)
png_add_test(NAME pngvalid-gamma-16-to-8
COMMAND pngvalid OPTIONS --gamma-16-to-8)
png_add_test(NAME pngvalid-gamma-alpha-mode
COMMAND pngvalid OPTIONS --gamma-alpha-mode)
png_add_test(NAME pngvalid-gamma-background
COMMAND pngvalid OPTIONS --gamma-background)
png_add_test(NAME pngvalid-gamma-expand16-alpha-mode
COMMAND pngvalid OPTIONS --gamma-alpha-mode --expand16)
png_add_test(NAME pngvalid-gamma-expand16-background
COMMAND pngvalid OPTIONS --gamma-background --expand16)
png_add_test(NAME pngvalid-gamma-expand16-transform
COMMAND pngvalid OPTIONS --gamma-transform --expand16)
png_add_test(NAME pngvalid-gamma-sbit
COMMAND pngvalid OPTIONS --gamma-sbit)
png_add_test(NAME pngvalid-gamma-threshold
COMMAND pngvalid OPTIONS --gamma-threshold)
png_add_test(NAME pngvalid-gamma-transform
COMMAND pngvalid OPTIONS --gamma-transform)
png_add_test(NAME pngvalid-progressive-interlace-standard
COMMAND pngvalid OPTIONS --standard --progressive-read --interlace)
png_add_test(NAME pngvalid-progressive-size
COMMAND pngvalid OPTIONS --size --progressive-read)
png_add_test(NAME pngvalid-progressive-standard
COMMAND pngvalid OPTIONS --standard --progressive-read)
png_add_test(NAME pngvalid-standard
COMMAND pngvalid OPTIONS --standard)
png_add_test(NAME pngvalid-transform
COMMAND pngvalid OPTIONS --transform)
add_executable(pngstest ${pngstest_sources})
target_link_libraries(pngstest png)
foreach(gamma_type 1.8 linear none sRGB)
foreach(alpha_type none alpha)
set(PNGSTEST_FILES)
foreach(test_png ${TEST_PNGS})
string(REGEX MATCH ".*-linear[-.].*" TEST_PNG_LINEAR "${test_png}")
string(REGEX MATCH ".*-sRGB[-.].*" TEST_PNG_SRGB "${test_png}")
string(REGEX MATCH ".*-1.8[-.].*" TEST_PNG_G18 "${test_png}")
string(REGEX MATCH ".*-alpha-.*" TEST_PNG_ALPHA "${test_png}")
set(TEST_PNG_VALID TRUE)
if(TEST_PNG_ALPHA)
if(NOT "${alpha_type}" STREQUAL "alpha")
set(TEST_PNG_VALID FALSE)
endif()
else()
if("${alpha_type}" STREQUAL "alpha")
set(TEST_PNG_VALID FALSE)
endif()
endif()
if(TEST_PNG_LINEAR)
if(NOT "${gamma_type}" STREQUAL "linear")
set(TEST_PNG_VALID FALSE)
endif()
elseif(TEST_PNG_SRGB)
if(NOT "${gamma_type}" STREQUAL "sRGB")
set(TEST_PNG_VALID FALSE)
endif()
elseif(TEST_PNG_G18)
if(NOT "${gamma_type}" STREQUAL "1.8")
set(TEST_PNG_VALID FALSE)
endif()
else()
if(NOT "${gamma_type}" STREQUAL "none")
set(TEST_PNG_VALID FALSE)
endif()
endif()
if(TEST_PNG_VALID)
list(APPEND PNGSTEST_FILES "${test_png}")
endif()
endforeach()
# Should already be sorted, but sort anyway to be certain.
list(SORT PNGSTEST_FILES)
png_add_test(NAME pngstest-${gamma_type}-${alpha_type}
COMMAND pngstest
OPTIONS --tmpfile "${gamma_type}-${alpha_type}-" --log
FILES ${PNGSTEST_FILES})
endforeach()
endforeach()
add_executable(pngunknown ${pngunknown_sources})
target_link_libraries(pngunknown png)
png_add_test(NAME pngunknown-discard COMMAND pngunknown OPTIONS --strict default=discard FILES "${PNGTEST_PNG}")
png_add_test(NAME pngunknown-IDAT COMMAND pngunknown OPTIONS --strict default=discard IDAT=save FILES "${PNGTEST_PNG}")
png_add_test(NAME pngunknown-if-safe COMMAND pngunknown OPTIONS --strict default=if-safe FILES "${PNGTEST_PNG}")
png_add_test(NAME pngunknown-sAPI COMMAND pngunknown OPTIONS --strict bKGD=save cHRM=save gAMA=save all=discard iCCP=save sBIT=save sRGB=save FILES "${PNGTEST_PNG}")
png_add_test(NAME pngunknown-save COMMAND pngunknown OPTIONS --strict default=save FILES "${PNGTEST_PNG}")
png_add_test(NAME pngunknown-sTER COMMAND pngunknown OPTIONS --strict sTER=if-safe FILES "${PNGTEST_PNG}")
png_add_test(NAME pngunknown-vpAg COMMAND pngunknown OPTIONS --strict vpAg=if-safe FILES "${PNGTEST_PNG}")
add_executable(pngimage ${pngimage_sources})
target_link_libraries(pngimage png)
png_add_test(NAME pngimage-quick COMMAND pngimage OPTIONS --list-combos --log FILES ${PNGSUITE_PNGS})
png_add_test(NAME pngimage-full COMMAND pngimage OPTIONS --exhaustive --list-combos --log FILES ${PNGSUITE_PNGS})
endif()
if(PNG_SHARED)
add_executable(pngfix ${pngfix_sources})
target_link_libraries(pngfix png)
set(PNG_BIN_TARGETS pngfix)
add_executable(png-fix-itxt ${png_fix_itxt_sources})
target_link_libraries(png-fix-itxt ${ZLIB_LIBRARIES} ${M_LIBRARY})
list(APPEND PNG_BIN_TARGETS png-fix-itxt)
endif()
# Set a variable with CMake code which:
# Creates a symlink from src to dest (if possible) or alternatively
# copies if different.
include(CMakeParseArguments)
function(create_symlink DEST_FILE)
cmake_parse_arguments(S "" "FILE;TARGET" "" ${ARGN})
if(NOT S_TARGET AND NOT S_FILE)
message(FATAL_ERROR "create_symlink: Missing TARGET or FILE argument")
endif()
if(S_TARGET AND S_FILE)
message(FATAL_ERROR "create_symlink: Both source file ${S_FILE} and build target ${S_TARGET} arguments are present; can only have one.")
endif()
if(S_FILE)
# If we don't need to symlink something that's coming from a build target,
# we can go ahead and symlink/copy at configure time.
if(CMAKE_HOST_WIN32 AND NOT CYGWIN)
execute_process(
COMMAND "${CMAKE_COMMAND}" -E copy_if_different ${S_FILE} ${DEST_FILE}
WORKING_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}")
else()
execute_process(
COMMAND ${CMAKE_COMMAND} -E create_symlink ${S_FILE} ${DEST_FILE}
WORKING_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}")
endif()
endif()
if(S_TARGET)
# We need to use generator expressions, which can be a bit tricky, so for
# simplicity make the symlink a POST_BUILD step and use the TARGET
# signature of add_custom_command.
if(CMAKE_HOST_WIN32 AND NOT CYGWIN)
add_custom_command(TARGET ${S_TARGET} POST_BUILD
COMMAND "${CMAKE_COMMAND}" -E copy_if_different $<TARGET_LINKER_FILE_NAME:${S_TARGET}> $<TARGET_LINKER_FILE_DIR:${S_TARGET}>/${DEST_FILE})
else()
add_custom_command(TARGET ${S_TARGET} POST_BUILD
COMMAND "${CMAKE_COMMAND}" -E create_symlink $<TARGET_LINKER_FILE_NAME:${S_TARGET}> $<TARGET_LINKER_FILE_DIR:${S_TARGET}>/${DEST_FILE})
endif()
endif()
endfunction()
# Create source generation scripts.
configure_file(${CMAKE_CURRENT_SOURCE_DIR}/scripts/genchk.cmake.in
${CMAKE_CURRENT_BINARY_DIR}/scripts/genchk.cmake @ONLY)
configure_file(${CMAKE_CURRENT_SOURCE_DIR}/scripts/genout.cmake.in
${CMAKE_CURRENT_BINARY_DIR}/scripts/genout.cmake @ONLY)
configure_file(${CMAKE_CURRENT_SOURCE_DIR}/scripts/gensrc.cmake.in
${CMAKE_CURRENT_BINARY_DIR}/scripts/gensrc.cmake @ONLY)
# libpng is a library so default to 'lib'
if(NOT DEFINED CMAKE_INSTALL_LIBDIR)
set(CMAKE_INSTALL_LIBDIR lib)
endif()
# CREATE PKGCONFIG FILES
# We use the same files like ./configure, so we have to set its vars.
# Only do this on Windows for Cygwin - the files don't make much sense outside
# of a UNIX look-alike.
if(NOT WIN32 OR CYGWIN OR MINGW)
set(prefix ${CMAKE_INSTALL_PREFIX})
set(exec_prefix ${CMAKE_INSTALL_PREFIX})
set(libdir ${CMAKE_INSTALL_FULL_LIBDIR})
set(includedir ${CMAKE_INSTALL_FULL_INCLUDEDIR})
set(LIBS "-lz -lm")
configure_file(${CMAKE_CURRENT_SOURCE_DIR}/libpng.pc.in
${CMAKE_CURRENT_BINARY_DIR}/${PNGLIB_NAME}.pc @ONLY)
create_symlink(libpng.pc FILE ${PNGLIB_NAME}.pc)
configure_file(${CMAKE_CURRENT_SOURCE_DIR}/libpng-config.in
${CMAKE_CURRENT_BINARY_DIR}/${PNGLIB_NAME}-config @ONLY)
create_symlink(libpng-config FILE ${PNGLIB_NAME}-config)
endif()
# SET UP LINKS
if(PNG_SHARED)
set_target_properties(png PROPERTIES
VERSION 16.${PNGLIB_RELEASE}.git
# VERSION 16.${PNGLIB_RELEASE}.0
SOVERSION 16
CLEAN_DIRECT_OUTPUT 1)
endif()
# INSTALL
if(NOT SKIP_INSTALL_LIBRARIES AND NOT SKIP_INSTALL_ALL)
install(TARGETS ${PNG_LIB_TARGETS}
EXPORT libpng
RUNTIME DESTINATION bin
LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
FRAMEWORK DESTINATION ${CMAKE_INSTALL_LIBDIR})
if(PNG_SHARED)
# Create a symlink for libpng.dll.a => libpng16.dll.a on Cygwin
if(CYGWIN OR MINGW)
create_symlink(libpng${CMAKE_IMPORT_LIBRARY_SUFFIX} TARGET png)
install(FILES $<TARGET_LINKER_FILE_DIR:png>/libpng${CMAKE_IMPORT_LIBRARY_SUFFIX}
DESTINATION ${CMAKE_INSTALL_LIBDIR})
endif()
if(NOT WIN32)
create_symlink(libpng${CMAKE_SHARED_LIBRARY_SUFFIX} TARGET png)
install(FILES $<TARGET_LINKER_FILE_DIR:png>/libpng${CMAKE_SHARED_LIBRARY_SUFFIX}
DESTINATION ${CMAKE_INSTALL_LIBDIR})
endif()
endif()
if(PNG_STATIC)
if(NOT WIN32 OR CYGWIN OR MINGW)
create_symlink(libpng${CMAKE_STATIC_LIBRARY_SUFFIX} TARGET png_static)
install(FILES $<TARGET_LINKER_FILE_DIR:png_static>/libpng${CMAKE_STATIC_LIBRARY_SUFFIX}
DESTINATION ${CMAKE_INSTALL_LIBDIR})
endif()
endif()
endif()
if(NOT SKIP_INSTALL_HEADERS AND NOT SKIP_INSTALL_ALL)
install(FILES ${libpng_public_hdrs} DESTINATION include)
install(FILES ${libpng_public_hdrs} DESTINATION include/${PNGLIB_NAME})
endif()
if(NOT SKIP_INSTALL_EXECUTABLES AND NOT SKIP_INSTALL_ALL)
if(NOT WIN32 OR CYGWIN OR MINGW)
install(PROGRAMS ${CMAKE_CURRENT_BINARY_DIR}/libpng-config DESTINATION bin)
install(PROGRAMS ${CMAKE_CURRENT_BINARY_DIR}/${PNGLIB_NAME}-config DESTINATION bin)
endif()
endif()
if(NOT SKIP_INSTALL_PROGRAMS AND NOT SKIP_INSTALL_ALL)
install(TARGETS ${PNG_BIN_TARGETS}
RUNTIME DESTINATION bin)
endif()
if(NOT SKIP_INSTALL_FILES AND NOT SKIP_INSTALL_ALL)
# Install man pages
if(NOT PNG_MAN_DIR)
set(PNG_MAN_DIR "share/man")
endif()
install(FILES libpng.3 libpngpf.3 DESTINATION ${PNG_MAN_DIR}/man3)
install(FILES png.5 DESTINATION ${PNG_MAN_DIR}/man5)
# Install pkg-config files
if(NOT CMAKE_HOST_WIN32 OR CYGWIN OR MINGW)
install(FILES ${CMAKE_CURRENT_BINARY_DIR}/libpng.pc
DESTINATION ${CMAKE_INSTALL_LIBDIR}/pkgconfig)
install(PROGRAMS ${CMAKE_CURRENT_BINARY_DIR}/libpng-config
DESTINATION bin)
install(FILES ${CMAKE_CURRENT_BINARY_DIR}/${PNGLIB_NAME}.pc
DESTINATION ${CMAKE_INSTALL_LIBDIR}/pkgconfig)
install(PROGRAMS ${CMAKE_CURRENT_BINARY_DIR}/${PNGLIB_NAME}-config
DESTINATION bin)
endif()
endif()
# Create an export file that CMake users can include() to import our targets.
if(NOT SKIP_INSTALL_EXPORT AND NOT SKIP_INSTALL_ALL)
install(EXPORT libpng DESTINATION lib/libpng FILE lib${PNG_LIB_NAME}.cmake)
endif()
# what's with libpng-manual.txt and all the extra files?
# UNINSTALL
# do we need this?
# DIST
# do we need this?
# to create msvc import lib for mingw compiled shared lib
# pexports libpng.dll > libpng.def
# lib /def:libpng.def /machine:x86
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