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# pkg.m4 - Macros to locate and utilise pkg-config. -*- Autoconf -*-
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# serial 11 (pkg-config-0.29.1)
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dnl Copyright © 2004 Scott James Remnant <scott@netsplit.com>.
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dnl Copyright © 2012-2015 Dan Nicholson <dbn.lists@gmail.com>
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dnl This program is free software; you can redistribute it and/or modify
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dnl it under the terms of the GNU General Public License as published by
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dnl the Free Software Foundation; either version 2 of the License, or
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dnl (at your option) any later version.
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dnl This program is distributed in the hope that it will be useful, but
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dnl WITHOUT ANY WARRANTY; without even the implied warranty of
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dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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dnl General Public License for more details.
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dnl You should have received a copy of the GNU General Public License
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dnl along with this program; if not, write to the Free Software
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dnl Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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dnl As a special exception to the GNU General Public License, if you
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dnl distribute this file as part of a program that contains a
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dnl configuration script generated by Autoconf, you may include it under
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dnl the same distribution terms that you use for the rest of that
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dnl PKG_PREREQ(MIN-VERSION)
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dnl -----------------------
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dnl Verify that the version of the pkg-config macros are at least
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dnl MIN-VERSION. Unlike PKG_PROG_PKG_CONFIG, which checks the user's
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dnl installed version of pkg-config, this checks the developer's version
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dnl of pkg.m4 when generating configure.
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dnl To ensure that this macro is defined, also add:
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dnl m4_ifndef([PKG_PREREQ],
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dnl [m4_fatal([must install pkg-config 0.29 or later before running autoconf/autogen])])
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dnl See the "Since" comment for each macro you use to see what version
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dnl of the macros you require.
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m4_defun([PKG_PREREQ],
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[m4_define([PKG_MACROS_VERSION], [0.29.1])
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m4_if(m4_version_compare(PKG_MACROS_VERSION, [$1]), -1,
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[m4_fatal([pkg.m4 version $1 or higher is required but ]PKG_MACROS_VERSION[ found])])
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dnl PKG_PROG_PKG_CONFIG([MIN-VERSION])
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dnl ----------------------------------
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dnl Search for the pkg-config tool and set the PKG_CONFIG variable to
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dnl first found in the path. Checks that the version of pkg-config found
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dnl is at least MIN-VERSION. If MIN-VERSION is not specified, 0.9.0 is
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dnl used since that's the first version where most current features of
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dnl pkg-config existed.
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AC_DEFUN([PKG_PROG_PKG_CONFIG],
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[m4_pattern_forbid([^_?PKG_[A-Z_]+$])
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m4_pattern_allow([^PKG_CONFIG(_(PATH|LIBDIR|SYSROOT_DIR|ALLOW_SYSTEM_(CFLAGS|LIBS)))?$])
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m4_pattern_allow([^PKG_CONFIG_(DISABLE_UNINSTALLED|TOP_BUILD_DIR|DEBUG_SPEW)$])
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AC_ARG_VAR([PKG_CONFIG], [path to pkg-config utility])
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AC_ARG_VAR([PKG_CONFIG_PATH], [directories to add to pkg-config's search path])
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AC_ARG_VAR([PKG_CONFIG_LIBDIR], [path overriding pkg-config's built-in search path])
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if test "x$ac_cv_env_PKG_CONFIG_set" != "xset"; then
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AC_PATH_TOOL([PKG_CONFIG], [pkg-config])
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if test -n "$PKG_CONFIG"; then
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_pkg_min_version=m4_default([$1], [0.9.0])
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AC_MSG_CHECKING([pkg-config is at least version $_pkg_min_version])
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if $PKG_CONFIG --atleast-pkgconfig-version $_pkg_min_version; then
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])dnl PKG_PROG_PKG_CONFIG
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dnl PKG_CHECK_EXISTS(MODULES, [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
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dnl -------------------------------------------------------------------
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dnl Check to see whether a particular set of modules exists. Similar to
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dnl PKG_CHECK_MODULES(), but does not set variables or print errors.
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dnl Please remember that m4 expands AC_REQUIRE([PKG_PROG_PKG_CONFIG])
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dnl only at the first occurence in configure.ac, so if the first place
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dnl it's called might be skipped (such as if it is within an "if", you
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dnl have to call PKG_CHECK_EXISTS manually
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AC_DEFUN([PKG_CHECK_EXISTS],
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[AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
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if test -n "$PKG_CONFIG" && \
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AC_RUN_LOG([$PKG_CONFIG --exists --print-errors "$1"]); then
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dnl _PKG_CONFIG([VARIABLE], [COMMAND], [MODULES])
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dnl ---------------------------------------------
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dnl Internal wrapper calling pkg-config via PKG_CONFIG and setting
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dnl pkg_failed based on the result.
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m4_define([_PKG_CONFIG],
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[if test -n "$$1"; then
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elif test -n "$PKG_CONFIG"; then
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PKG_CHECK_EXISTS([$3],
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[pkg_cv_[]$1=`$PKG_CONFIG --[]$2 "$3" 2>/dev/null`
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test "x$?" != "x0" && pkg_failed=yes ],
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dnl _PKG_SHORT_ERRORS_SUPPORTED
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dnl ---------------------------
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dnl Internal check to see if pkg-config supports short errors.
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AC_DEFUN([_PKG_SHORT_ERRORS_SUPPORTED],
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[AC_REQUIRE([PKG_PROG_PKG_CONFIG])
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if $PKG_CONFIG --atleast-pkgconfig-version 0.20; then
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_pkg_short_errors_supported=yes
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_pkg_short_errors_supported=no
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])dnl _PKG_SHORT_ERRORS_SUPPORTED
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dnl PKG_CHECK_MODULES(VARIABLE-PREFIX, MODULES, [ACTION-IF-FOUND],
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dnl [ACTION-IF-NOT-FOUND])
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dnl --------------------------------------------------------------
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dnl Note that if there is a possibility the first call to
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dnl PKG_CHECK_MODULES might not happen, you should be sure to include an
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dnl explicit call to PKG_PROG_PKG_CONFIG in your configure.ac
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AC_DEFUN([PKG_CHECK_MODULES],
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[AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
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AC_ARG_VAR([$1][_CFLAGS], [C compiler flags for $1, overriding pkg-config])dnl
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AC_ARG_VAR([$1][_LIBS], [linker flags for $1, overriding pkg-config])dnl
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AC_MSG_CHECKING([for $1])
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_PKG_CONFIG([$1][_CFLAGS], [cflags], [$2])
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_PKG_CONFIG([$1][_LIBS], [libs], [$2])
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m4_define([_PKG_TEXT], [Alternatively, you may set the environment variables $1[]_CFLAGS
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and $1[]_LIBS to avoid the need to call pkg-config.
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See the pkg-config man page for more details.])
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if test $pkg_failed = yes; then
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_PKG_SHORT_ERRORS_SUPPORTED
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if test $_pkg_short_errors_supported = yes; then
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$1[]_PKG_ERRORS=`$PKG_CONFIG --short-errors --print-errors --cflags --libs "$2" 2>&1`
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$1[]_PKG_ERRORS=`$PKG_CONFIG --print-errors --cflags --libs "$2" 2>&1`
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# Put the nasty error message in config.log where it belongs
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echo "$$1[]_PKG_ERRORS" >&AS_MESSAGE_LOG_FD
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m4_default([$4], [AC_MSG_ERROR(
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[Package requirements ($2) were not met:
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Consider adjusting the PKG_CONFIG_PATH environment variable if you
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installed software in a non-standard prefix.
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elif test $pkg_failed = untried; then
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m4_default([$4], [AC_MSG_FAILURE(
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[The pkg-config script could not be found or is too old. Make sure it
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is in your PATH or set the PKG_CONFIG environment variable to the full
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To get pkg-config, see <http://pkg-config.freedesktop.org/>.])[]dnl
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$1[]_CFLAGS=$pkg_cv_[]$1[]_CFLAGS
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$1[]_LIBS=$pkg_cv_[]$1[]_LIBS
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])dnl PKG_CHECK_MODULES
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dnl PKG_CHECK_MODULES_STATIC(VARIABLE-PREFIX, MODULES, [ACTION-IF-FOUND],
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dnl [ACTION-IF-NOT-FOUND])
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dnl ---------------------------------------------------------------------
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dnl Checks for existence of MODULES and gathers its build flags with
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dnl static libraries enabled. Sets VARIABLE-PREFIX_CFLAGS from --cflags
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dnl and VARIABLE-PREFIX_LIBS from --libs.
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dnl Note that if there is a possibility the first call to
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dnl PKG_CHECK_MODULES_STATIC might not happen, you should be sure to
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dnl include an explicit call to PKG_PROG_PKG_CONFIG in your
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AC_DEFUN([PKG_CHECK_MODULES_STATIC],
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[AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
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_save_PKG_CONFIG=$PKG_CONFIG
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PKG_CONFIG="$PKG_CONFIG --static"
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PKG_CHECK_MODULES($@)
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PKG_CONFIG=$_save_PKG_CONFIG[]dnl
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])dnl PKG_CHECK_MODULES_STATIC
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dnl PKG_INSTALLDIR([DIRECTORY])
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dnl -------------------------
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dnl Substitutes the variable pkgconfigdir as the location where a module
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dnl should install pkg-config .pc files. By default the directory is
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dnl $libdir/pkgconfig, but the default can be changed by passing
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dnl DIRECTORY. The user can override through the --with-pkgconfigdir
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AC_DEFUN([PKG_INSTALLDIR],
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[m4_pushdef([pkg_default], [m4_default([$1], ['${libdir}/pkgconfig'])])
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m4_pushdef([pkg_description],
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[pkg-config installation directory @<:@]pkg_default[@:>@])
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AC_ARG_WITH([pkgconfigdir],
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[AS_HELP_STRING([--with-pkgconfigdir], pkg_description)],,
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[with_pkgconfigdir=]pkg_default)
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AC_SUBST([pkgconfigdir], [$with_pkgconfigdir])
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m4_popdef([pkg_default])
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m4_popdef([pkg_description])
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dnl PKG_NOARCH_INSTALLDIR([DIRECTORY])
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dnl --------------------------------
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dnl Substitutes the variable noarch_pkgconfigdir as the location where a
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dnl module should install arch-independent pkg-config .pc files. By
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dnl default the directory is $datadir/pkgconfig, but the default can be
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dnl changed by passing DIRECTORY. The user can override through the
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dnl --with-noarch-pkgconfigdir parameter.
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AC_DEFUN([PKG_NOARCH_INSTALLDIR],
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[m4_pushdef([pkg_default], [m4_default([$1], ['${datadir}/pkgconfig'])])
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m4_pushdef([pkg_description],
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[pkg-config arch-independent installation directory @<:@]pkg_default[@:>@])
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AC_ARG_WITH([noarch-pkgconfigdir],
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[AS_HELP_STRING([--with-noarch-pkgconfigdir], pkg_description)],,
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[with_noarch_pkgconfigdir=]pkg_default)
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AC_SUBST([noarch_pkgconfigdir], [$with_noarch_pkgconfigdir])
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m4_popdef([pkg_default])
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m4_popdef([pkg_description])
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])dnl PKG_NOARCH_INSTALLDIR
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dnl PKG_CHECK_VAR(VARIABLE, MODULE, CONFIG-VARIABLE,
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dnl [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
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dnl -------------------------------------------
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dnl Retrieves the value of the pkg-config variable for the given module.
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AC_DEFUN([PKG_CHECK_VAR],
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[AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
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AC_ARG_VAR([$1], [value of $3 for $2, overriding pkg-config])dnl
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_PKG_CONFIG([$1], [variable="][$3]["], [$2])
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AS_VAR_COPY([$1], [pkg_cv_][$1])
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AS_VAR_IF([$1], [""], [$5], [$4])dnl
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dnl PKG_WITH_MODULES(VARIABLE-PREFIX, MODULES,
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dnl [ACTION-IF-FOUND],[ACTION-IF-NOT-FOUND],
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dnl [DESCRIPTION], [DEFAULT])
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dnl ------------------------------------------
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dnl Prepare a "--with-" configure option using the lowercase
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dnl [VARIABLE-PREFIX] name, merging the behaviour of AC_ARG_WITH and
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dnl PKG_CHECK_MODULES in a single macro.
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AC_DEFUN([PKG_WITH_MODULES],
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m4_pushdef([with_arg], m4_tolower([$1]))
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m4_pushdef([description],
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[m4_default([$5], [build with ]with_arg[ support])])
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m4_pushdef([def_arg], [m4_default([$6], [auto])])
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m4_pushdef([def_action_if_found], [AS_TR_SH([with_]with_arg)=yes])
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m4_pushdef([def_action_if_not_found], [AS_TR_SH([with_]with_arg)=no])
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[yes],[m4_pushdef([with_without], [--without-]with_arg)],
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[m4_pushdef([with_without],[--with-]with_arg)])
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AC_ARG_WITH(with_arg,
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AS_HELP_STRING(with_without, description[ @<:@default=]def_arg[@:>@]),,
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[AS_TR_SH([with_]with_arg)=def_arg])
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AS_CASE([$AS_TR_SH([with_]with_arg)],
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[yes],[PKG_CHECK_MODULES([$1],[$2],$3,$4)],
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[auto],[PKG_CHECK_MODULES([$1],[$2],
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[m4_n([def_action_if_found]) $3],
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[m4_n([def_action_if_not_found]) $4])])
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m4_popdef([with_arg])
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m4_popdef([description])
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])dnl PKG_WITH_MODULES
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dnl PKG_HAVE_WITH_MODULES(VARIABLE-PREFIX, MODULES,
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dnl [DESCRIPTION], [DEFAULT])
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dnl -----------------------------------------------
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dnl Convenience macro to trigger AM_CONDITIONAL after PKG_WITH_MODULES
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dnl check._[VARIABLE-PREFIX] is exported as make variable.
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AC_DEFUN([PKG_HAVE_WITH_MODULES],
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PKG_WITH_MODULES([$1],[$2],,,[$3],[$4])
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AM_CONDITIONAL([HAVE_][$1],
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[test "$AS_TR_SH([with_]m4_tolower([$1]))" = "yes"])
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])dnl PKG_HAVE_WITH_MODULES
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dnl PKG_HAVE_DEFINE_WITH_MODULES(VARIABLE-PREFIX, MODULES,
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dnl [DESCRIPTION], [DEFAULT])
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dnl ------------------------------------------------------
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dnl Convenience macro to run AM_CONDITIONAL and AC_DEFINE after
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dnl PKG_WITH_MODULES check. HAVE_[VARIABLE-PREFIX] is exported as make
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dnl and preprocessor variable.
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AC_DEFUN([PKG_HAVE_DEFINE_WITH_MODULES],
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PKG_HAVE_WITH_MODULES([$1],[$2],[$3],[$4])
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AS_IF([test "$AS_TR_SH([with_]m4_tolower([$1]))" = "yes"],
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[AC_DEFINE([HAVE_][$1], 1, [Enable ]m4_tolower([$1])[ support])])
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])dnl PKG_HAVE_DEFINE_WITH_MODULES
added
removed
m4/pkg.m4
