65 lines
2.8 KiB
CMake
65 lines
2.8 KiB
CMake
#-------------------------------------------------------------------
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# FindFFmpeg.cmake and FindLibAV.cmake are dependent on this file.
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#
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# Redistribution and use is allowed according to the terms of the BSD license.
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# For details see the accompanying COPYING-CMAKE-SCRIPTS file
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#
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#-------------------------------------------------------------------
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### Macro: set_component_found
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#
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# Marks the given component as found if both *_LIBRARIES AND *_INCLUDE_DIRS is present.
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#
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macro(set_component_found _component )
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if(${_component}_LIBRARIES AND ${_component}_INCLUDE_DIRS)
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# message(STATUS " - ${_component} found.")
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set(${_component}_FOUND TRUE)
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else()
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# message(STATUS " - ${_component} not found.")
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endif()
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endmacro()
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#
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### Macro: find_component
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#
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# Finds each component's library file and include directory, and sets
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# *_LIBRARIES and *_INCLUDE_DIRS accordingly. Additionally detects each
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# component's version and sets *_VERSION_STRING.
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#
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macro(find_component _component _library _header _version)
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find_path(${_component}_INCLUDE_DIRS ${_header}
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PATH_SUFFIXES
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ffmpeg
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libav
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include
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)
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find_library(${_component}_LIBRARIES
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NAMES ${_library}
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PATH_SUFFIXES
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lib
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)
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if(${_component}_INCLUDE_DIRS AND EXISTS "${${_component}_INCLUDE_DIRS}/${_version}")
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file(STRINGS "${${_component}_INCLUDE_DIRS}/${_version}" ${_component}_VERSION_MAJOR_LINE REGEX "^#define[ \t]+LIB${_component}_VERSION_MAJOR[ \t]+[0-9]+$")
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file(STRINGS "${${_component}_INCLUDE_DIRS}/${_version}" ${_component}_VERSION_MINOR_LINE REGEX "^#define[ \t]+LIB${_component}_VERSION_MINOR[ \t]+[0-9]+$")
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file(STRINGS "${${_component}_INCLUDE_DIRS}/${_version}" ${_component}_VERSION_PATCH_LINE REGEX "^#define[ \t]+LIB${_component}_VERSION_MICRO[ \t]+[0-9]+$")
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string(REGEX REPLACE "^#define[ \t]+LIB${_component}_VERSION_MAJOR[ \t]+([0-9]+)$" "\\1" ${_component}_VERSION_MAJOR "${${_component}_VERSION_MAJOR_LINE}")
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string(REGEX REPLACE "^#define[ \t]+LIB${_component}_VERSION_MINOR[ \t]+([0-9]+)$" "\\1" ${_component}_VERSION_MINOR "${${_component}_VERSION_MINOR_LINE}")
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string(REGEX REPLACE "^#define[ \t]+LIB${_component}_VERSION_MICRO[ \t]+([0-9]+)$" "\\1" ${_component}_VERSION_PATCH "${${_component}_VERSION_PATCH_LINE}")
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set(${_component}_VERSION_STRING ${${_component}_VERSION_MAJOR}.${${_component}_VERSION_MINOR}.${${_component}_VERSION_PATCH})
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unset(${_component}_VERSION_MAJOR_LINE)
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unset(${_component}_VERSION_MINOR_LINE)
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unset(${_component}_VERSION_PATCH_LINE)
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unset(${_component}_VERSION_MAJOR)
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unset(${_component}_VERSION_MINOR)
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unset(${_component}_VERSION_PATCH)
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endif()
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find_package_handle_standard_args(${_component}
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REQUIRED_VARS ${_component}_LIBRARIES ${_component}_INCLUDE_DIRS
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VERSION_VAR ${_component}_VERSION_STRING
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)
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set_component_found(${_component})
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endmacro()
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