UsePkgConfig.cmake 2.65 KB
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# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
# file Copyright.txt or https://cmake.org/licensing for details.

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#[=======================================================================[.rst:
UsePkgConfig
------------

Obsolete pkg-config module for CMake, use FindPkgConfig instead.



This module defines the following macro:

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
#]=======================================================================]
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find_program(PKGCONFIG_EXECUTABLE NAMES pkg-config )
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macro(PKGCONFIG _package _include_DIR _link_DIR _link_FLAGS _cflags)
  message(STATUS
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    "WARNING: you are using the obsolete 'PKGCONFIG' macro, use FindPkgConfig")
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# reset the variables at the beginning
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  set(${_include_DIR})
  set(${_link_DIR})
  set(${_link_FLAGS})
  set(${_cflags})
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  # if pkg-config has been found
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  if(PKGCONFIG_EXECUTABLE)
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    exec_program(${PKGCONFIG_EXECUTABLE} ARGS ${_package} --exists RETURN_VALUE _return_VALUE OUTPUT_VARIABLE _pkgconfigDevNull )
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    # and if the package of interest also exists for pkg-config, then get the information
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    if(NOT _return_VALUE)
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      exec_program(${PKGCONFIG_EXECUTABLE} ARGS ${_package} --variable=includedir
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        OUTPUT_VARIABLE ${_include_DIR} )
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      string(REGEX REPLACE "[\r\n]" " " ${_include_DIR} "${${_include_DIR}}")
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      exec_program(${PKGCONFIG_EXECUTABLE} ARGS ${_package} --variable=libdir
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        OUTPUT_VARIABLE ${_link_DIR} )
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      string(REGEX REPLACE "[\r\n]" " " ${_link_DIR} "${${_link_DIR}}")
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      exec_program(${PKGCONFIG_EXECUTABLE} ARGS ${_package} --libs
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        OUTPUT_VARIABLE ${_link_FLAGS} )
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      string(REGEX REPLACE "[\r\n]" " " ${_link_FLAGS} "${${_link_FLAGS}}")
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      exec_program(${PKGCONFIG_EXECUTABLE} ARGS ${_package} --cflags
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        OUTPUT_VARIABLE ${_cflags} )
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      string(REGEX REPLACE "[\r\n]" " " ${_cflags} "${${_cflags}}")
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    else()
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      message(STATUS "PKGCONFIG() indicates that ${_package} is not installed (install the package which contains ${_package}.pc if you want to support this feature)")
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    endif()
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  # if pkg-config has NOT been found, INFORM the user
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  else()
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    message(STATUS "WARNING: PKGCONFIG() indicates that the tool pkg-config has not been found on your system. You should install it.")
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  endif()
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endmacro()
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mark_as_advanced(PKGCONFIG_EXECUTABLE)