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# - a pkg-config module for CMake
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# pkg_check_modules(<PREFIX> [REQUIRED] <MODULE> [<MODULE>]*)
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# checks for all the given modules
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# pkg_search_module(<PREFIX> [REQUIRED] <MODULE> [<MODULE>]*)
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# checks for given modules and uses the first working one
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# When the 'REQUIRED' argument was set, macros will fail with an error
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# when module(s) could not be found
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# It sets the following variables:
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# PKG_CONFIG_FOUND ... true iff pkg-config works on the system
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# PKG_CONFIG_EXECUTABLE ... pathname of the pkg-config program
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# <PREFIX>_FOUND ... set to 1 iff module(s) exist
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# For the following variables two sets of values exist; first one is the
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# common one and has the given PREFIX. The second set contains flags
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# which are given out when pkgconfig was called with the '--static'
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# <XPREFIX>_LIBRARIES ... only the libraries (w/o the '-l')
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# <XPREFIX>_LIBRARY_DIRS ... the paths of the libraries (w/o the '-L')
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# <XPREFIX>_LDFLAGS ... all required linker flags
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# <XPREFIX>_LDFLAGS_OTHER ... all other linker flags
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# <XPREFIX>_INCLUDE_DIRS ... the '-I' preprocessor flags (w/o the '-I')
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# <XPREFIX>_CFLAGS ... all required cflags
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# <XPREFIX>_CFLAGS_OTHER ... the other compiler flags
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# <XPREFIX> = <PREFIX> for common case
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# <XPREFIX> = <PREFIX>_STATIC for static linking
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# There are some special variables whose prefix depends on the count
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# of given modules. When there is only one module, <PREFIX> stays
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# unchanged. When there are multiple modules, the prefix will be
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# changed to <PREFIX>_<MODNAME>:
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# <XPREFIX>_VERSION ... version of the module
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# <XPREFIX>_PREFIX ... prefix-directory of the module
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# <XPREFIX>_INCLUDEDIR ... include-dir of the module
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# <XPREFIX>_LIBDIR ... lib-dir of the module
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# <XPREFIX> = <PREFIX> when |MODULES| == 1, else
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# <XPREFIX> = <PREFIX>_<MODNAME>
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# A <MODULE> parameter can have the following formats:
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# {MODNAME} ... matches any version
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# {MODNAME}>={VERSION} ... at least version <VERSION> is required
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# {MODNAME}={VERSION} ... exactly version <VERSION> is required
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# {MODNAME}<={VERSION} ... modules must not be newer than <VERSION>
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# pkg_check_modules (GLIB2 glib-2.0)
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# pkg_check_modules (GLIB2 glib-2.0>=2.10)
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# requires at least version 2.10 of glib2 and defines e.g.
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# GLIB2_VERSION=2.10.3
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# pkg_check_modules (FOO glib-2.0>=2.10 gtk+-2.0)
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# requires both glib2 and gtk2, and defines e.g.
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# FOO_glib-2.0_VERSION=2.10.3
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# FOO_gtk+-2.0_VERSION=2.8.20
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# pkg_check_modules (XRENDER REQUIRED xrender)
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# XRENDER_LIBRARIES=Xrender;X11
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# XRENDER_STATIC_LIBRARIES=Xrender;X11;pthread;Xau;Xdmcp
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# pkg_search_module (BAR libxml-2.0 libxml2 libxml>=2)
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# Copyright (C) 2006 Enrico Scholz <enrico.scholz@informatik.tu-chemnitz.de>
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# Redistribution and use, with or without modification, are permitted
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# provided that the following conditions are met:
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# 1. Redistributions must retain the above copyright notice, this
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# list of conditions and the following disclaimer.
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# 2. The name of the author may not be used to endorse or promote
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# products derived from this software without specific prior
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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# DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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# GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
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# IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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# OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
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# IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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set(PKG_CONFIG_VERSION 1)
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set(PKG_CONFIG_FOUND 0)
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find_program(PKG_CONFIG_EXECUTABLE NAMES pkg-config DOC "pkg-config executable")
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mark_as_advanced(PKG_CONFIG_EXECUTABLE)
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if(PKG_CONFIG_EXECUTABLE)
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set(PKG_CONFIG_FOUND 1)
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endif(PKG_CONFIG_EXECUTABLE)
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# Unsets the given variables
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macro(_pkgconfig_unset var)
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set(${var} "" CACHE INTERNAL "")
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endmacro(_pkgconfig_unset)
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macro(_pkgconfig_set var value)
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set(${var} ${value} CACHE INTERNAL "")
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endmacro(_pkgconfig_set)
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# Invokes pkgconfig, cleans up the result and sets variables
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macro(_pkgconfig_invoke _pkglist _prefix _varname _regexp)
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set(_pkgconfig_invoke_result)
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COMMAND ${PKG_CONFIG_EXECUTABLE} ${ARGN} ${_pkglist}
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OUTPUT_VARIABLE _pkgconfig_invoke_result
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RESULT_VARIABLE _pkgconfig_failed)
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if (_pkgconfig_failed)
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set(_pkgconfig_${_varname} "")
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_pkgconfig_unset(${_prefix}_${_varname})
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else(_pkgconfig_failed)
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string(REGEX REPLACE "[\r\n]" " " _pkgconfig_invoke_result "${_pkgconfig_invoke_result}")
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string(REGEX REPLACE " +$" "" _pkgconfig_invoke_result "${_pkgconfig_invoke_result}")
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if (NOT ${_regexp} STREQUAL "")
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string(REGEX REPLACE "${_regexp}" " " _pkgconfig_invoke_result "${_pkgconfig_invoke_result}")
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endif(NOT ${_regexp} STREQUAL "")
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separate_arguments(_pkgconfig_invoke_result)
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#message(STATUS " ${_varname} ... ${_pkgconfig_invoke_result}")
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set(_pkgconfig_${_varname} ${_pkgconfig_invoke_result})
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_pkgconfig_set(${_prefix}_${_varname} "${_pkgconfig_invoke_result}")
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endif(_pkgconfig_failed)
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endmacro(_pkgconfig_invoke)
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# Invokes pkgconfig two times; once without '--static' and once with
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macro(_pkgconfig_invoke_dyn _pkglist _prefix _varname cleanup_regexp)
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_pkgconfig_invoke("${_pkglist}" ${_prefix} ${_varname} "${cleanup_regexp}" ${ARGN})
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_pkgconfig_invoke("${_pkglist}" ${_prefix} STATIC_${_varname} "${cleanup_regexp}" --static ${ARGN})
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endmacro(_pkgconfig_invoke_dyn)
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# Splits given arguments into options and a package list
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macro(_pkgconfig_parse_options _result _is_req)
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foreach(_pkg ${ARGN})
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if (_pkg STREQUAL "REQUIRED")
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endif (_pkg STREQUAL "REQUIRED")
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endforeach(_pkg ${ARGN})
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set(${_result} ${ARGN})
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list(REMOVE_ITEM ${_result} "REQUIRED")
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endmacro(_pkgconfig_parse_options)
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macro(_pkg_check_modules_internal _is_required _is_silent _prefix)
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_pkgconfig_unset(${_prefix}_FOUND)
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_pkgconfig_unset(${_prefix}_VERSION)
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_pkgconfig_unset(${_prefix}_PREFIX)
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_pkgconfig_unset(${_prefix}_INCLUDEDIR)
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_pkgconfig_unset(${_prefix}_LIBDIR)
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_pkgconfig_unset(${_prefix}_LIBRARIES)
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_pkgconfig_unset(${_prefix}_LIBRARY_DIRS)
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_pkgconfig_unset(${_prefix}_LDFLAGS)
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_pkgconfig_unset(${_prefix}_LDFLAGS_OTHER)
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_pkgconfig_unset(${_prefix}_INCLUDE_DIRS)
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_pkgconfig_unset(${_prefix}_CFLAGS)
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_pkgconfig_unset(${_prefix}_CFLAGS_OTHER)
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_pkgconfig_unset(${_prefix}_STATIC_LIBRARIES)
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_pkgconfig_unset(${_prefix}_STATIC_LIBRARY_DIRS)
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_pkgconfig_unset(${_prefix}_STATIC_LDFLAGS)
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_pkgconfig_unset(${_prefix}_STATIC_LDFLAGS_OTHER)
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_pkgconfig_unset(${_prefix}_STATIC_INCLUDE_DIRS)
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_pkgconfig_unset(${_prefix}_STATIC_CFLAGS)
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_pkgconfig_unset(${_prefix}_STATIC_CFLAGS_OTHER)
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# create a better addressable variable of the modules and calculate its size
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set(_pkg_check_modules_list ${ARGN})
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list(LENGTH _pkg_check_modules_list _pkg_check_modules_cnt)
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if(PKG_CONFIG_EXECUTABLE)
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# give out status message telling checked module
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if (NOT ${_is_silent})
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if (_pkg_check_modules_cnt EQUAL 1)
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message(STATUS "checking for module '${_pkg_check_modules_list}'")
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else(_pkg_check_modules_cnt EQUAL 1)
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message(STATUS "checking for modules '${_pkg_check_modules_list}'")
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endif(_pkg_check_modules_cnt EQUAL 1)
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endif(NOT ${_is_silent})
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set(_pkg_check_modules_packages)
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set(_pkg_check_modules_failed)
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# iterate through module list and check whether they exist and match the required version
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foreach (_pkg_check_modules_pkg ${_pkg_check_modules_list})
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set(_pkg_check_modules_exist_query)
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# check whether version is given
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if (_pkg_check_modules_pkg MATCHES ".*(>=|=|<=).*")
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string(REGEX REPLACE "(.*[^><])(>=|=|<=)(.*)" "\\1" _pkg_check_modules_pkg_name "${_pkg_check_modules_pkg}")
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string(REGEX REPLACE "(.*[^><])(>=|=|<=)(.*)" "\\2" _pkg_check_modules_pkg_op "${_pkg_check_modules_pkg}")
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string(REGEX REPLACE "(.*[^><])(>=|=|<=)(.*)" "\\3" _pkg_check_modules_pkg_ver "${_pkg_check_modules_pkg}")
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else(_pkg_check_modules_pkg MATCHES ".*(>=|=|<=).*")
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set(_pkg_check_modules_pkg_name "${_pkg_check_modules_pkg}")
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set(_pkg_check_modules_pkg_op)
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set(_pkg_check_modules_pkg_ver)
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endif(_pkg_check_modules_pkg MATCHES ".*(>=|=|<=).*")
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# handle the operands
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if (_pkg_check_modules_pkg_op STREQUAL ">=")
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list(APPEND _pkg_check_modules_exist_query --atleast-version)
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endif(_pkg_check_modules_pkg_op STREQUAL ">=")
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if (_pkg_check_modules_pkg_op STREQUAL "=")
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list(APPEND _pkg_check_modules_exist_query --exact-version)
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endif(_pkg_check_modules_pkg_op STREQUAL "=")
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if (_pkg_check_modules_pkg_op STREQUAL "<=")
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list(APPEND _pkg_check_modules_exist_query --max-version)
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endif(_pkg_check_modules_pkg_op STREQUAL "<=")
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# create the final query which is of the format:
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# * --atleast-version <version> <pkg-name>
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# * --exact-version <version> <pkg-name>
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# * --max-version <version> <pkg-name>
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# * --exists <pkg-name>
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if (_pkg_check_modules_pkg_op)
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list(APPEND _pkg_check_modules_exist_query "${_pkg_check_modules_pkg_ver}")
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else(_pkg_check_modules_pkg_op)
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list(APPEND _pkg_check_modules_exist_query --exists)
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endif(_pkg_check_modules_pkg_op)
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_pkgconfig_unset(${_prefix}_${_pkg_check_modules_pkg_name}_VERSION)
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_pkgconfig_unset(${_prefix}_${_pkg_check_modules_pkg_name}_PREFIX)
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_pkgconfig_unset(${_prefix}_${_pkg_check_modules_pkg_name}_INCLUDEDIR)
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_pkgconfig_unset(${_prefix}_${_pkg_check_modules_pkg_name}_LIBDIR)
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list(APPEND _pkg_check_modules_exist_query "${_pkg_check_modules_pkg_name}")
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list(APPEND _pkg_check_modules_packages "${_pkg_check_modules_pkg_name}")
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COMMAND ${PKG_CONFIG_EXECUTABLE} ${_pkg_check_modules_exist_query}
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RESULT_VARIABLE _pkgconfig_retval)
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# evaluate result and tell failures
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if (_pkgconfig_retval)
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if(NOT ${_is_silent})
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message(STATUS " package '${_pkg_check_modules_pkg}' not found")
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endif(NOT ${_is_silent})
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set(_pkg_check_modules_failed 1)
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endif(_pkgconfig_retval)
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endforeach(_pkg_check_modules_pkg)
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if(_pkg_check_modules_failed)
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# fail when requested
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message(SEND_ERROR "A required package was not found")
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endif (${_is_required})
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else(_pkg_check_modules_failed)
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# when we are here, we checked whether requested modules
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# exist. Now, go through them and set variables
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_pkgconfig_set(${_prefix}_FOUND 1)
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list(LENGTH _pkg_check_modules_packages pkg_count)
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# iterate through all modules again and set individual variables
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foreach (_pkg_check_modules_pkg ${_pkg_check_modules_packages})
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# handle case when there is only one package required
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if (pkg_count EQUAL 1)
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set(_pkg_check_prefix "${_prefix}")
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else(pkg_count EQUAL 1)
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set(_pkg_check_prefix "${_prefix}_${_pkg_check_modules_pkg}")
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endif(pkg_count EQUAL 1)
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_pkgconfig_invoke(${_pkg_check_modules_pkg} "${_pkg_check_prefix}" VERSION "" --modversion )
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_pkgconfig_invoke(${_pkg_check_modules_pkg} "${_pkg_check_prefix}" PREFIX "" --variable=prefix )
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_pkgconfig_invoke(${_pkg_check_modules_pkg} "${_pkg_check_prefix}" INCLUDEDIR "" --variable=includedir )
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_pkgconfig_invoke(${_pkg_check_modules_pkg} "${_pkg_check_prefix}" LIBDIR "" --variable=libdir )
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message(STATUS " found ${_pkg_check_modules_pkg}, version ${_pkgconfig_VERSION}")
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endforeach(_pkg_check_modules_pkg)
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# set variables which are combined for multiple modules
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_pkgconfig_invoke_dyn("${_pkg_check_modules_packages}" "${_prefix}" LIBRARIES "(^| )-l" --libs-only-l )
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_pkgconfig_invoke_dyn("${_pkg_check_modules_packages}" "${_prefix}" LIBRARY_DIRS "(^| )-L" --libs-only-L )
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_pkgconfig_invoke_dyn("${_pkg_check_modules_packages}" "${_prefix}" LDFLAGS "" --libs )
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_pkgconfig_invoke_dyn("${_pkg_check_modules_packages}" "${_prefix}" LDFLAGS_OTHER "" --libs-only-other )
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_pkgconfig_invoke_dyn("${_pkg_check_modules_packages}" "${_prefix}" INCLUDE_DIRS "(^| )-I" --cflags-only-I )
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_pkgconfig_invoke_dyn("${_pkg_check_modules_packages}" "${_prefix}" CFLAGS "" --cflags )
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_pkgconfig_invoke_dyn("${_pkg_check_modules_packages}" "${_prefix}" CFLAGS_OTHER "" --cflags-only-other )
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endif(_pkg_check_modules_failed)
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else(PKG_CONFIG_EXECUTABLE)
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message(SEND_ERROR "pkg-config tool not found")
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endif (${_is_required})
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endif(PKG_CONFIG_EXECUTABLE)
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endmacro(_pkg_check_modules_internal)
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### User visible macros start here
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macro(pkg_check_modules _prefix _module0)
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if (NOT DEFINED __pkg_config_checked_${_prefix} OR __pkg_config_checked_${_prefix} LESS ${PKG_CONFIG_VERSION})
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_pkgconfig_parse_options (_pkg_modules _pkg_is_required "${_module0}" ${ARGN})
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_pkg_check_modules_internal("${_pkg_is_required}" 0 "${_prefix}" ${_pkg_modules})
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_pkgconfig_set(__pkg_config_checked_${_prefix} ${PKG_CONFIG_VERSION})
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endif(NOT DEFINED __pkg_config_checked_${_prefix} OR __pkg_config_checked_${_prefix} LESS ${PKG_CONFIG_VERSION})
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endmacro(pkg_check_modules)
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macro(pkg_search_module _prefix _module0)
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if (NOT DEFINED __pkg_config_checked_${_prefix} OR __pkg_config_checked_${_prefix} LESS ${PKG_CONFIG_VERSION})
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set(_pkg_modules_found 0)
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_pkgconfig_parse_options(_pkg_modules_alt _pkg_is_required "${_module0}" ${ARGN})
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message(STATUS "checking for one of the modules '${_pkg_modules_alt}'")
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# iterate through all modules and stop at the first working one.
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foreach(_pkg_alt ${_pkg_modules_alt})
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if(NOT _pkg_modules_found)
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_pkg_check_modules_internal(0 1 "${_prefix}" "${_pkg_alt}")
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endif(NOT _pkg_modules_found)
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if (${_prefix}_FOUND)
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set(_pkg_modules_found 1)
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endif(${_prefix}_FOUND)
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if (NOT ${_prefix}_FOUND)
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if(${_pkg_is_required})
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message(SEND_ERROR "None of the required '${_pkg_modules_alt}' found")
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endif(${_pkg_is_required})
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endif(NOT ${_prefix}_FOUND)
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_pkgconfig_set(__pkg_config_checked_${_prefix} ${PKG_CONFIG_VERSION})
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endif(NOT DEFINED __pkg_config_checked_${_prefix} OR __pkg_config_checked_${_prefix} LESS ${PKG_CONFIG_VERSION})
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endmacro(pkg_search_module)
added
removed
cmake/FindPkgConfig.cmake
