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Diffstat (limited to 'Modules/FindPkgConfig.cmake')
| -rw-r--r-- | Modules/FindPkgConfig.cmake | 380 |
1 files changed, 380 insertions, 0 deletions
diff --git a/Modules/FindPkgConfig.cmake b/Modules/FindPkgConfig.cmake new file mode 100644 index 0000000..b39048e --- /dev/null +++ b/Modules/FindPkgConfig.cmake @@ -0,0 +1,380 @@ +# - a pkg-config module for CMake +# +# Usage: +# pkg_check_modules(<PREFIX> [REQUIRED] <MODULE> [<MODULE>]*) +# checks for all the given modules +# +# pkg_search_module(<PREFIX> [REQUIRED] <MODULE> [<MODULE>]*) +# checks for given modules and uses the first working one +# +# When the 'REQUIRED' argument was set, macros will fail with an error +# when module(s) could not be found +# +# It sets the following variables: +# PKG_CONFIG_FOUND ... true iff pkg-config works on the system +# PKG_CONFIG_EXECUTABLE ... pathname of the pkg-config program +# <PREFIX>_FOUND ... set to 1 iff module(s) exist +# +# For the following variables two sets of values exist; first one is the +# common one and has the given PREFIX. The second set contains flags +# which are given out when pkgconfig was called with the '--static' +# option. +# <XPREFIX>_LIBRARIES ... only the libraries (w/o the '-l') +# <XPREFIX>_LIBRARY_DIRS ... the paths of the libraries (w/o the '-L') +# <XPREFIX>_LDFLAGS ... all required linker flags +# <XPREFIX>_LDFLAGS_OTHERS ... all other linker flags +# <XPREFIX>_INCLUDE_DIRS ... the '-I' preprocessor flags (w/o the '-I') +# <XPREFIX>_CFLAGS ... all required cflags +# <XPREFIX>_CFLAGS_OTHERS ... the other compiler flags +# +# <XPREFIX> = <PREFIX> for common case +# <XPREFIX> = <PREFIX>_STATIC for static linking +# +# There are some special variables whose prefix depends on the count +# of given modules. When there is only one module, <PREFIX> stays +# unchanged. When there are multiple modules, the prefix will be +# changed to <PREFIX>_<MODNAME>: +# <XPREFIX>_VERSION ... version of the module +# <XPREFIX>_PREFIX ... prefix-directory of the module +# <XPREFIX>_INCLUDEDIR ... include-dir of the module +# <XPREFIX>_LIBDIR ... lib-dir of the module +# +# <XPREFIX> = <PREFIX> when |MODULES| == 1, else +# <XPREFIX> = <PREFIX>_<MODNAME> +# +# A <MODULE> parameter can have the following formats: +# {MODNAME} ... matches any version +# {MODNAME}>={VERSION} ... at least version <VERSION> is required +# {MODNAME}={VERSION} ... exactly version <VERSION> is required +# {MODNAME}<={VERSION} ... modules must not be newer than <VERSION> +# +# Examples +# pkg_check_modules (GLIB2 glib-2.0) +# +# pkg_check_modules (GLIB2 glib-2.0>=2.10) +# requires at least version 2.10 of glib2 and defines e.g. +# GLIB2_VERSION=2.10.3 +# +# pkg_check_modules (FOO glib-2.0>=2.10 gtk+-2.0) +# requires both glib2 and gtk2, and defines e.g. +# FOO_glib-2.0_VERSION=2.10.3 +# FOO_gtk+-2.0_VERSION=2.8.20 +# +# pkg_check_modules (XRENDER REQUIRED xrender) +# defines e.g.: +# XRENDER_LIBRARIES=Xrender;X11 +# XRENDER_STATIC_LIBRARIES=Xrender;X11;pthread;Xau;Xdmcp +# +# pkg_search_module (BAR libxml-2.0 libxml2 libxml>=2) + + +# Copyright (C) 2006 Enrico Scholz <enrico.scholz@informatik.tu-chemnitz.de> +# +# Redistribution and use, with or without modification, are permitted +# provided that the following conditions are met: +# +# 1. Redistributions must retain the above copyright notice, this +# list of conditions and the following disclaimer. +# 2. The name of the author may not be used to endorse or promote +# products derived from this software without specific prior +# written permission. +# +# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR +# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED +# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY +# DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE +# GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS +# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER +# IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR +# OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN +# IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + + +### Common stuff #### +set(PKG_CONFIG_VERSION 1) +set(PKG_CONFIG_FOUND 0) + +find_program(PKG_CONFIG_EXECUTABLE NAMES pkg-config DOC "pkg-config executable") +mark_as_advanced(PKG_CONFIG_EXECUTABLE) + +if(PKG_CONFIG_EXECUTABLE) + set(PKG_CONFIG_FOUND 1) +endif(PKG_CONFIG_EXECUTABLE) + + +# Unsets the given variables +macro(_pkgconfig_unset var) + set(${var} "" CACHE INTERNAL "") +endmacro(_pkgconfig_unset) + +macro(_pkgconfig_set var value) + set(${var} ${value} CACHE INTERNAL "") +endmacro(_pkgconfig_set) + +# Invokes pkgconfig, cleans up the result and sets variables +macro(_pkgconfig_invoke _pkglist _prefix _varname _regexp) + set(_pkgconfig_invoke_result) + + execute_process( + COMMAND ${PKG_CONFIG_EXECUTABLE} ${ARGN} ${_pkglist} + OUTPUT_VARIABLE _pkgconfig_invoke_result + RESULT_VARIABLE _pkgconfig_failed) + + if (_pkgconfig_failed) + set(_pkgconfig_${_varname} "") + _pkgconfig_unset(${_prefix}_${_varname}) + else(_pkgconfig_failed) + string(REGEX REPLACE "[\r\n]" " " _pkgconfig_invoke_result "${_pkgconfig_invoke_result}") + string(REGEX REPLACE " +$" "" _pkgconfig_invoke_result "${_pkgconfig_invoke_result}") + + if (NOT ${_regexp} STREQUAL "") + string(REGEX REPLACE "${_regexp}" " " _pkgconfig_invoke_result "${_pkgconfig_invoke_result}") + endif(NOT ${_regexp} STREQUAL "") + + separate_arguments(_pkgconfig_invoke_result) + + #message(STATUS " ${_varname} ... ${_pkgconfig_invoke_result}") + set(_pkgconfig_${_varname} ${_pkgconfig_invoke_result}) + _pkgconfig_set(${_prefix}_${_varname} "${_pkgconfig_invoke_result}") + endif(_pkgconfig_failed) +endmacro(_pkgconfig_invoke) + +# Invokes pkgconfig two times; once without '--static' and once with +# '--static' +macro(_pkgconfig_invoke_dyn _pkglist _prefix _varname cleanup_regexp) + _pkgconfig_invoke("${_pkglist}" ${_prefix} ${_varname} "${cleanup_regexp}" ${ARGN}) + _pkgconfig_invoke("${_pkglist}" ${_prefix} STATIC_${_varname} "${cleanup_regexp}" --static ${ARGN}) +endmacro(_pkgconfig_invoke_dyn) + +# Splits given arguments into options and a package list +macro(_pkgconfig_parse_options _result _is_req) + set(${_is_req} 0) + + foreach(_pkg ${ARGN}) + if (_pkg STREQUAL "REQUIRED") + set(${_is_req} 1) + endif (_pkg STREQUAL "REQUIRED") + endforeach(_pkg ${ARGN}) + + set(${_result} ${ARGN}) + list(REMOVE_ITEM ${_result} "REQUIRED") +endmacro(_pkgconfig_parse_options) + +### +macro(_pkg_check_modules_internal _is_required _is_silent _prefix) + _pkgconfig_unset(${_prefix}_FOUND) + _pkgconfig_unset(${_prefix}_VERSION) + _pkgconfig_unset(${_prefix}_PREFIX) + _pkgconfig_unset(${_prefix}_INCLUDEDIR) + _pkgconfig_unset(${_prefix}_LIBDIR) + _pkgconfig_unset(${_prefix}_LIBS) + _pkgconfig_unset(${_prefix}_LIBS_L) + _pkgconfig_unset(${_prefix}_LIBS_PATHS) + _pkgconfig_unset(${_prefix}_LIBS_OTHER) + _pkgconfig_unset(${_prefix}_CFLAGS) + _pkgconfig_unset(${_prefix}_CFLAGS_I) + _pkgconfig_unset(${_prefix}_CFLAGS_OTHER) + _pkgconfig_unset(${_prefix}_STATIC_LIBDIR) + _pkgconfig_unset(${_prefix}_STATIC_LIBS) + _pkgconfig_unset(${_prefix}_STATIC_LIBS_L) + _pkgconfig_unset(${_prefix}_STATIC_LIBS_PATHS) + _pkgconfig_unset(${_prefix}_STATIC_LIBS_OTHER) + _pkgconfig_unset(${_prefix}_STATIC_CFLAGS) + _pkgconfig_unset(${_prefix}_STATIC_CFLAGS_I) + _pkgconfig_unset(${_prefix}_STATIC_CFLAGS_OTHER) + + # create a better addressable variable of the modules and calculate its size + set(_pkg_check_modules_list ${ARGN}) + list(LENGTH _pkg_check_modules_list _pkg_check_modules_cnt) + + if(PKG_CONFIG_EXECUTABLE) + # give out status message telling checked module + if (NOT ${_is_silent}) + if (_pkg_check_modules_cnt EQUAL 1) + message(STATUS "checking for module '${_pkg_check_modules_list}'") + else(_pkg_check_modules_cnt EQUAL 1) + message(STATUS "checking for modules '${_pkg_check_modules_list}'") + endif(_pkg_check_modules_cnt EQUAL 1) + endif(NOT ${_is_silent}) + + set(_pkg_check_modules_packages) + set(_pkg_check_modules_failed) + + # iterate through module list and check whether they exist and match the required version + foreach (_pkg_check_modules_pkg ${_pkg_check_modules_list}) + set(_pkg_check_modules_exist_query) + + # check whether version is given + if (_pkg_check_modules_pkg MATCHES ".*(>=|=|<=).*") + string(REGEX REPLACE "(.*[^><])(>=|=|<=)(.*)" "\\1" _pkg_check_modules_pkg_name "${_pkg_check_modules_pkg}") + string(REGEX REPLACE "(.*[^><])(>=|=|<=)(.*)" "\\2" _pkg_check_modules_pkg_op "${_pkg_check_modules_pkg}") + string(REGEX REPLACE "(.*[^><])(>=|=|<=)(.*)" "\\3" _pkg_check_modules_pkg_ver "${_pkg_check_modules_pkg}") + else(_pkg_check_modules_pkg MATCHES ".*(>=|=|<=).*") + set(_pkg_check_modules_pkg_name "${_pkg_check_modules_pkg}") + set(_pkg_check_modules_pkg_op) + set(_pkg_check_modules_pkg_ver) + endif(_pkg_check_modules_pkg MATCHES ".*(>=|=|<=).*") + + # handle the operands + if (_pkg_check_modules_pkg_op STREQUAL ">=") + list(APPEND _pkg_check_modules_exist_query --atleast-version) + endif(_pkg_check_modules_pkg_op STREQUAL ">=") + + if (_pkg_check_modules_pkg_op STREQUAL "=") + list(APPEND _pkg_check_modules_exist_query --exact-version) + endif(_pkg_check_modules_pkg_op STREQUAL "=") + + if (_pkg_check_modules_pkg_op STREQUAL "<=") + list(APPEND _pkg_check_modules_exist_query --max-version) + endif(_pkg_check_modules_pkg_op STREQUAL "<=") + + # create the final query which is of the format: + # * --atleast-version <version> <pkg-name> + # * --exact-version <version> <pkg-name> + # * --max-version <version> <pkg-name> + # * --exists <pkg-name> + if (_pkg_check_modules_pkg_op) + list(APPEND _pkg_check_modules_exist_query "${_pkg_check_modules_pkg_ver}") + else(_pkg_check_modules_pkg_op) + list(APPEND _pkg_check_modules_exist_query --exists) + endif(_pkg_check_modules_pkg_op) + + _pkgconfig_unset(${_prefix}_${_pkg_check_modules_pkg_name}_VERSION) + _pkgconfig_unset(${_prefix}_${_pkg_check_modules_pkg_name}_PREFIX) + _pkgconfig_unset(${_prefix}_${_pkg_check_modules_pkg_name}_INCLUDEDIR) + _pkgconfig_unset(${_prefix}_${_pkg_check_modules_pkg_name}_LIBDIR) + + list(APPEND _pkg_check_modules_exist_query "${_pkg_check_modules_pkg_name}") + list(APPEND _pkg_check_modules_packages "${_pkg_check_modules_pkg_name}") + + # execute the query + execute_process( + COMMAND ${PKG_CONFIG_EXECUTABLE} ${_pkg_check_modules_exist_query} + RESULT_VARIABLE _pkgconfig_retval) + + # evaluate result and tell failures + if (_pkgconfig_retval) + if(NOT ${_is_silent}) + message(STATUS " package '${_pkg_check_modules_pkg}' not found") + endif(NOT ${_is_silent}) + + set(_pkg_check_modules_failed 1) + endif(_pkgconfig_retval) + endforeach(_pkg_check_modules_pkg) + + if(_pkg_check_modules_failed) + # fail when requested + if (${_is_required}) + message(SEND_ERROR "A required package was not found") + endif (${_is_required}) + else(_pkg_check_modules_failed) + # when we are here, we checked whether requested modules + # exist. Now, go through them and set variables + + _pkgconfig_set(${_prefix}_FOUND 1) + list(LENGTH _pkg_check_modules_packages pkg_count) + + # iterate through all modules again and set individual variables + foreach (_pkg_check_modules_pkg ${_pkg_check_modules_packages}) + # handle case when there is only one package required + if (pkg_count EQUAL 1) + set(_pkg_check_prefix "${_prefix}") + else(pkg_count EQUAL 1) + set(_pkg_check_prefix "${_prefix}_${_pkg_check_modules_pkg}") + endif(pkg_count EQUAL 1) + + _pkgconfig_invoke(${_pkg_check_modules_pkg} "${_pkg_check_prefix}" VERSION "" --modversion ) + _pkgconfig_invoke(${_pkg_check_modules_pkg} "${_pkg_check_prefix}" PREFIX "" --variable=prefix ) + _pkgconfig_invoke(${_pkg_check_modules_pkg} "${_pkg_check_prefix}" INCLUDEDIR "" --variable=includedir ) + _pkgconfig_invoke(${_pkg_check_modules_pkg} "${_pkg_check_prefix}" LIBDIR "" --variable=libdir ) + + message(STATUS " found ${_pkg_check_modules_pkg}, version ${_pkgconfig_VERSION}") + endforeach(_pkg_check_modules_pkg) + + # set variables which are combined for multiple modules + _pkgconfig_invoke_dyn("${_pkg_check_modules_packages}" "${_prefix}" LIBRARIES "(^| )-l" --libs-only-l ) + _pkgconfig_invoke_dyn("${_pkg_check_modules_packages}" "${_prefix}" LIBRARY_DIRS "(^| )-L" --libs-only-L ) + _pkgconfig_invoke_dyn("${_pkg_check_modules_packages}" "${_prefix}" LDFLAGS "" --libs ) + _pkgconfig_invoke_dyn("${_pkg_check_modules_packages}" "${_prefix}" LDFLAGS_OTHER "" --libs-only-other ) + + _pkgconfig_invoke_dyn("${_pkg_check_modules_packages}" "${_prefix}" INCLUDE_DIRS "(^| )-I" --cflags-only-I ) + _pkgconfig_invoke_dyn("${_pkg_check_modules_packages}" "${_prefix}" CFLAGS "" --cflags ) + _pkgconfig_invoke_dyn("${_pkg_check_modules_packages}" "${_prefix}" CFLAGS_OTHER "" --cflags-only-other ) + endif(_pkg_check_modules_failed) + else(PKG_CONFIG_EXECUTABLE) + if (${_is_required}) + message(SEND_ERROR "pkg-config tool not found") + endif (${_is_required}) + endif(PKG_CONFIG_EXECUTABLE) +endmacro(_pkg_check_modules_internal) + +### +### User visible macros start here +### + +### +macro(pkg_check_modules _prefix _module0) + # check cached value + if (NOT DEFINED __pkg_config_checked_${_prefix} OR __pkg_config_checked_${_prefix} LESS ${PKG_CONFIG_VERSION}) + _pkgconfig_parse_options (_pkg_modules _pkg_is_required "${_module0}" ${ARGN}) + _pkg_check_modules_internal("${_pkg_is_required}" 0 "${_prefix}" ${_pkg_modules}) + + _pkgconfig_set(__pkg_config_checked_${_prefix} ${PKG_CONFIG_VERSION}) + endif(NOT DEFINED __pkg_config_checked_${_prefix} OR __pkg_config_checked_${_prefix} LESS ${PKG_CONFIG_VERSION}) +endmacro(pkg_check_modules) + +### +macro(pkg_search_module _prefix _module0) + # check cached value + if (NOT DEFINED __pkg_config_checked_${_prefix} OR __pkg_config_checked_${_prefix} LESS ${PKG_CONFIG_VERSION}) + set(_pkg_modules_found 0) + _pkgconfig_parse_options(_pkg_modules_alt _pkg_is_required "${_module0}" ${ARGN}) + + message(STATUS "checking for one of the modules '${_pkg_modules_alt}'") + + # iterate through all modules and stop at the first working one. + foreach(_pkg_alt ${_pkg_modules_alt}) + if(NOT _pkg_modules_found) + _pkg_check_modules_internal(0 1 "${_prefix}" "${_pkg_alt}") + endif(NOT _pkg_modules_found) + + if (${_prefix}_FOUND) + set(_pkg_modules_found 1) + endif(${_prefix}_FOUND) + endforeach(_pkg_alt) + + if (NOT ${_prefix}_FOUND) + if(${_pkg_is_required}) + message(SEND_ERROR "None of the required '${_pkg_modules_alt}' found") + endif(${_pkg_is_required}) + endif(NOT ${_prefix}_FOUND) + + _pkgconfig_set(__pkg_config_checked_${_prefix} ${PKG_CONFIG_VERSION}) + endif(NOT DEFINED __pkg_config_checked_${_prefix} OR __pkg_config_checked_${_prefix} LESS ${PKG_CONFIG_VERSION}) +endmacro(pkg_search_module) + +### +macro(PKGCONFIG _package _include_DIR _link_DIR _link_FLAGS _cflags) + message(STATUS "WARNING: you are using the obsolete 'PKGCONFIG' macro") + _pkg_check_modules_internal(0 0 _PKGCONFIG_TMP "${_package}") + if (_PKGCONFIG_TMP_FOUND) + set(${_include_DIR} ${_PKGCONFIG_TMP_INCLUDEDIR}) + set(${_link_DIR} ${_PKGCONFIG_TMP_LIBDIR}) + set(${_link_FLAGS} ${_PKGCONFIG_TMP_LDFLAGS}) + set(${_cflags} ${_PKGCONFIG_TMP_CFLAGS}) + set(_return_VALUE 0) + else(_PKGCONFIG_TMP_FOUND) + set(${_include_DIR}) + set(${_link_DIR}) + set(${_link_FLAGS}) + set(${_cflags}) + set(_return_VALUE 1) + endif(_PKGCONFIG_TMP_FOUND) +endmacro(PKGCONFIG) + + +### Local Variables: +### mode: cmake +### End: |