UsePkgConfig.cmake
# - 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 PATHS /usr/local/bin )
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}}")
ENDIF(NOT _return_VALUE)
ENDIF(PKGCONFIG_EXECUTABLE)
ENDMACRO(PKGCONFIG _include_DIR _link_DIR _link_FLAGS _cflags)
MARK_AS_ADVANCED(PKGCONFIG_EXECUTABLE)