pcsx2/cmake/CheckLib.cmake

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CMake
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include(FindPkgConfig OPTIONAL)
macro(_internal_message msg)
message("${msg}")
endmacro()
macro(check_lib var lib)
set(_arg_list ${ARGN})
if(PKG_CONFIG_FOUND AND NOT DEFINED pcsx2_manually_found_${var})
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string(TOLOWER ${lib} lower_lib)
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pkg_search_module(${var} QUIET IMPORTED_TARGET ${lower_lib})
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endif()
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if(TARGET PkgConfig::${var})
_internal_message("-- ${var} found pkg")
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else()
find_library(${var}_LIBRARIES ${lib})
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if(_arg_list)
find_path(${var}_INCLUDE ${_arg_list})
else()
set(${var}_INCLUDE FALSE)
endif()
if(${var}_LIBRARIES AND ${var}_INCLUDE)
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add_library(PkgConfig::${var} UNKNOWN IMPORTED GLOBAL)
# Imitate what pkg-config would have found
set_target_properties(PkgConfig::${var} PROPERTIES
IMPORTED_LOCATION "${${var}_LIBRARIES}"
INTERFACE_INCLUDE_DIRECTORIES "${${var}_INCLUDE}"
)
_internal_message("-- ${var} found")
set(${var}_FOUND 1 CACHE INTERNAL "")
set(pcsx2_manually_found_${var} 1 CACHE INTERNAL "")
elseif(${var}_LIBRARIES)
_internal_message("-- ${var} not found (miss include)")
elseif(${var}_INCLUDE)
_internal_message("-- ${var} not found (miss lib)")
else()
_internal_message("-- ${var} not found")
endif()
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endif()
endmacro()