minecraft-pi-docker/dependencies/libpng/CMakeLists.txt

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project(libpng)
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# ZLib (Needed By libpng)
add_subdirectory(zlib)
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# Silence Warnings
add_compile_options(-w)
## LibPNG
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# Options
set(PNG_TESTS FALSE CACHE BOOL "" FORCE)
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set(PNG_NO_STDIO FALSE CACHE BOOL "" FORCE)
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set(PNG_BUILD_ZLIB TRUE CACHE BOOL "" FORCE)
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# Download
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set(ZLIB_LIBRARY zlibstatic)
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set(ZLIB_INCLUDE_DIRS "${CMAKE_CURRENT_SOURCE_DIR}/zlib/src" "${CMAKE_CURRENT_BINARY_DIR}/zlib/src")
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add_subdirectory(src EXCLUDE_FROM_ALL)
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# Use Symbol Versioning
set_target_properties(png12 PROPERTIES LINK_OPTIONS "LINKER:--version-script=${CMAKE_CURRENT_SOURCE_DIR}/libpng.vers")
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# Ensure Build
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add_custom_target(png12-build ALL DEPENDS png12)
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# Install
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install(TARGETS png12 DESTINATION "${MCPI_LIB_DIR}")
if(BUILD_ARM_COMPONENTS)
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install(TARGETS png12 zlibstatic EXPORT sdk DESTINATION "${MCPI_SDK_LIB_DIR}")
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endif()
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# License
install(FILES src/LICENSE DESTINATION "${MCPI_LEGAL_DIR}/libpng")