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240e20d87c
Currently only vcpkg and Slackware seem to provide a libspng CMake package config file, and the one in Slackware is slightly broken. (It doesn't include CMakeFindDependencyMacro, so find_dependency() fails.) Thus, I am only barely confident that this works. CMakeLists.txt: - If WITH_SYSTEM_SPNG, silently try to find libspng via a CMake package config file and fall back to using pkg-config. - If WITH_SYSTEM_SPNG, allow the imported libspng target to be overridden with a new CMake variable (SPNG_TARGET.) Config.cmake.in: - If WITH_SYSTEM_SPNG, call find_dependency(SPNG) if the libspng imported target doesn't start with PkgConfig::. Further addresses limitations discussed in #901
25 lines
640 B
CMake
25 lines
640 B
CMake
@PACKAGE_INIT@
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set(WITH_SYSTEM_SPNG @WITH_SYSTEM_SPNG@)
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set(WITH_SYSTEM_ZLIB @WITH_SYSTEM_ZLIB@)
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if(WITH_SYSTEM_SPNG OR WITH_SYSTEM_ZLIB)
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include(CMakeFindDependencyMacro)
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if(WITH_SYSTEM_SPNG)
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set(SPNG_LIBRARY @SPNG_LIBRARY@)
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if(SPNG_LIBRARY MATCHES "PkgConfig::")
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find_dependency(PkgConfig)
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if(PkgConfig_FOUND)
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pkg_check_modules(spng REQUIRED spng IMPORTED_TARGET)
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endif()
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else()
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find_dependency(SPNG)
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endif()
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else()
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find_dependency(ZLIB)
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endif()
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endif()
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include("${CMAKE_CURRENT_LIST_DIR}/@CMAKE_PROJECT_NAME@Targets.cmake")
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check_required_components("@CMAKE_PROJECT_NAME@")
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