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# - pkg-config module for CMake
#
# Defines the following macros:
#
# PKGCONFIG_FOUND(package found)
# PKGCONFIG(package includedir libdir linkflags cflags)
# PKGCONFIG_VERSION(package version)
# PKGCONFIG_DEFINITION(package definition)
# Calling PKGCONFIG_FOUND will fill into the argument the value of the package search's result
# e.g. PKGCONFIG_FOUND(libart-2.0 LIBART_FOUND)
#
# Calling PKGCONFIG_VERSION will fill the desired version into the argument,
# e.g. PKGCONFIG_VERSION(libart-2.0 LIBART_VERSION)
# 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
#
# Calling PKGCONFIG_VERSION will fill the desired version into the argument,
# e.g. PKGCONFIG_VERSION(libart-2.0 LIBART_VERSION)
#
# Calling PKGCONFIG_DEFINITION will fill the definition (e.g -D_REENTRANT) into the argument,
# e.g. PKGCONFIG_DEFINITION(libart-2.0 LIBART_DEFINITION)
FIND_PROGRAM(PKGCONFIG_EXECUTABLE NAMES pkg-config PATHS /usr/local/bin )
MACRO(STRIP_NEWLINES _string_var)
STRING(REGEX REPLACE "[\n\r]+" "" ${_string_var} ${${_string_var}})
ENDMACRO(STRIP_NEWLINES _string_var)
MACRO(PKGCONFIG_FOUND _package _found)
# reset the variable at the beginning
SET(${_found})
# if pkg-config has been found
IF(PKGCONFIG_EXECUTABLE)
EXEC_PROGRAM(${PKGCONFIG_EXECUTABLE} ARGS ${_package} --print-errors --exists RETURN_VALUE _return_VALUE OUTPUT_VARIABLE _pkgconfigDevNull )
IF(${_pkgconfigDevNull})
MESSAGE(STATUS "${_pkgconfigDevNull}")
ENDIF(${_pkgconfigDevNull})
IF(NOT _return_VALUE)
SET(${_found} "TRUE")
ENDIF(NOT _return_VALUE)
ENDIF(PKGCONFIG_EXECUTABLE)
ENDMACRO(PKGCONFIG_FOUND _found)
MACRO(PKGCONFIG _package _include_DIR _link_DIR _link_FLAGS _cflags)
# reset the variables at the beginning
SET(${_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 ${_include_DIR} )
EXEC_PROGRAM(${PKGCONFIG_EXECUTABLE} ARGS ${_package} --variable=libdir OUTPUT_VARIABLE ${_link_DIR} )
EXEC_PROGRAM(${PKGCONFIG_EXECUTABLE} ARGS ${_package} --libs OUTPUT_VARIABLE ${_link_FLAGS} )
EXEC_PROGRAM(${PKGCONFIG_EXECUTABLE} ARGS ${_package} --cflags OUTPUT_VARIABLE ${_cflags} )
STRIP_NEWLINES(${_cflags})
ENDIF(NOT _return_VALUE)
ENDIF(PKGCONFIG_EXECUTABLE)
ENDMACRO(PKGCONFIG _include_DIR _link_DIR _link_FLAGS _cflags)
MACRO(PKGCONFIG_VERSION _package _version)
# reset the variables at the beginning
SET(${_version})
# if pkg-config has been found
IF(PKGCONFIG_EXECUTABLE)
EXEC_PROGRAM(${PKGCONFIG_EXECUTABLE} ARGS --print-errors ${_package} --exists RETURN_VALUE _return_VALUE OUTPUT_VARIABLE _pkgconfigDevNull )
# and if the package of interest also exists for pkg-config, then get the information
IF(NOT _return_VALUE)
EXEC_PROGRAM(${PKGCONFIG_EXECUTABLE} ARGS --print-errors ${_package} --modversion OUTPUT_VARIABLE ${_version} )
ENDIF(NOT _return_VALUE)
ENDIF(PKGCONFIG_EXECUTABLE)
ENDMACRO(PKGCONFIG_VERSION _package _version)
MARK_AS_ADVANCED(PKGCONFIG_EXECUTABLE)
MACRO(PKGCONFIG_DEFINITION _package _definition)
# reset the variables at the beginning
SET(${_definition})
# if pkg-config has been found
IF(PKGCONFIG_EXECUTABLE)
EXEC_PROGRAM(${PKGCONFIG_EXECUTABLE} ARGS --print-errors ${_package} --exists RETURN_VALUE _return_VALUE OUTPUT_VARIABLE _pkgconfigDevNull )
# and if the package of interest also exists for pkg-config, then get the information
IF(NOT _return_VALUE)
EXEC_PROGRAM(${PKGCONFIG_EXECUTABLE} ARGS --print-errors ${_package} --cflags-only-other OUTPUT_VARIABLE ${_definition} )
ENDIF(NOT _return_VALUE)
ENDIF(PKGCONFIG_EXECUTABLE)
ENDMACRO(PKGCONFIG_DEFINITION _package _definition)
MARK_AS_ADVANCED(PKGCONFIG_EXECUTABLE)
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