CMake/Modules/UsePkgConfig.cmake

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# - obsolete pkg-config module for CMake
#
# Defines the following macros:
#
# PKGCONFIG(package includedir libdir linkflags cflags)
#
# Calling PKGCONFIG will fill the desired information into the 4 given arguments,
# e.g. PKGCONFIG(libart-2.0 LIBART_INCLUDE_DIR LIBART_LINK_DIR LIBART_LINK_FLAGS LIBART_CFLAGS)
# if pkg-config was NOT found or the specified software package doesn't exist, the
# variable will be empty when the function returns, otherwise they will contain the respective information
#
FIND_PROGRAM(PKGCONFIG_EXECUTABLE NAMES pkg-config )
MACRO(PKGCONFIG _package _include_DIR _link_DIR _link_FLAGS _cflags)
MESSAGE(STATUS
"WARNING: you are using the obsolete 'PKGCONFIG' macro use FindPkgConfig")
# reset the variables at the beginning
SET(${_include_DIR})
SET(${_link_DIR})
SET(${_link_FLAGS})
SET(${_cflags})
# if pkg-config has been found
IF(PKGCONFIG_EXECUTABLE)
EXEC_PROGRAM(${PKGCONFIG_EXECUTABLE} ARGS ${_package} --exists RETURN_VALUE _return_VALUE OUTPUT_VARIABLE _pkgconfigDevNull )
# and if the package of interest also exists for pkg-config, then get the information
IF(NOT _return_VALUE)
EXEC_PROGRAM(${PKGCONFIG_EXECUTABLE} ARGS ${_package} --variable=includedir
OUTPUT_VARIABLE ${_include_DIR} )
STRING(REGEX REPLACE "[\r\n]" " " ${_include_DIR} "${${_include_DIR}}")
EXEC_PROGRAM(${PKGCONFIG_EXECUTABLE} ARGS ${_package} --variable=libdir
OUTPUT_VARIABLE ${_link_DIR} )
STRING(REGEX REPLACE "[\r\n]" " " ${_link_DIR} "${${_link_DIR}}")
EXEC_PROGRAM(${PKGCONFIG_EXECUTABLE} ARGS ${_package} --libs
OUTPUT_VARIABLE ${_link_FLAGS} )
STRING(REGEX REPLACE "[\r\n]" " " ${_link_FLAGS} "${${_link_FLAGS}}")
EXEC_PROGRAM(${PKGCONFIG_EXECUTABLE} ARGS ${_package} --cflags
OUTPUT_VARIABLE ${_cflags} )
STRING(REGEX REPLACE "[\r\n]" " " ${_cflags} "${${_cflags}}")
ELSE( NOT _return_VALUE)
MESSAGE(STATUS "PKGCONFIG() indicates that ${_package} is not installed (install the package which contains ${_package}.pc if you want to support this feature)")
ENDIF(NOT _return_VALUE)
# if pkg-config has NOT been found, INFORM the user
ELSE(PKGCONFIG_EXECUTABLE)
MESSAGE(STATUS "WARNING: PKGCONFIG() indicates that the tool pkg-config has not been found on your system. You should install it.")
ENDIF(PKGCONFIG_EXECUTABLE)
ENDMACRO(PKGCONFIG _include_DIR _link_DIR _link_FLAGS _cflags)
MARK_AS_ADVANCED(PKGCONFIG_EXECUTABLE)