obs-studio/cmake/Modules/FindLibx264.cmake

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# Once done these will be defined:
#
# Libx264_FOUND
# Libx264_INCLUDE_DIR
# Libx264_LIBRARIES
#
if(Libx264_INCLUDE_DIR AND Libx264_LIBRARIES)
set(Libx264_FOUND TRUE)
else()
find_package(PkgConfig QUIET)
if (PKG_CONFIG_FOUND)
pkg_check_modules(_X264 QUIET x264)
endif()
if(CMAKE_SIZEOF_VOID_P EQUAL 8)
set(_lib_suffix 64)
else()
set(_lib_suffix 32)
endif()
find_path(X264_INCLUDE_DIR
NAMES x264.h
HINTS
ENV x264Path
${_X264_INCLUDE_DIRS}
/usr/include /usr/local/include /opt/local/include /sw/include)
find_library(X264_LIB
NAMES x264 libx264
HINTS ${X264_INCLUDE_DIR}/../lib ${X264_INCLUDE_DIR}/lib${_lib_suffix} ${_X264_LIBRARY_DIRS} /usr/lib /usr/local/lib /opt/local/lib /sw/lib)
set(Libx264_INCLUDE_DIR ${X264_INCLUDE_DIR} CACHE PATH "x264 include dir")
set(Libx264_LIBRARIES ${X264_LIB} CACHE STRING "x264 libraries")
find_package_handle_standard_args(Libx264 DEFAULT_MSG X264_LIB X264_INCLUDE_DIR)
mark_as_advanced(X264_INCLUDE_DIR X264_LIB)
endif()