1 # pkg.m4 - Macros to locate and utilise pkg-config. -*- Autoconf -*-
3 # Copyright © 2004 Scott James Remnant <scott@netsplit.com>.
5 # This program is free software; you can redistribute it and/or modify
6 # it under the terms of the GNU General Public License as published by
7 # the Free Software Foundation; either version 2 of the License, or
8 # (at your option) any later version.
10 # This program is distributed in the hope that it will be useful, but
11 # WITHOUT ANY WARRANTY; without even the implied warranty of
12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 # General Public License for more details.
15 # You should have received a copy of the GNU General Public License
16 # along with this program; if not, write to the Free Software
17 # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19 # As a special exception to the GNU General Public License, if you
20 # distribute this file as part of a program that contains a
21 # configuration script generated by Autoconf, you may include it under
22 # the same distribution terms that you use for the rest of that program.
24 # PKG_PROG_PKG_CONFIG([MIN-VERSION])
25 # ----------------------------------
26 AC_DEFUN([PKG_PROG_PKG_CONFIG],
27 [m4_pattern_forbid([^_?PKG_[A-Z_]+$])
28 m4_pattern_allow([^PKG_CONFIG(_PATH)?$])
29 AC_ARG_VAR([PKG_CONFIG], [path to pkg-config utility])dnl
30 if test "x$ac_cv_env_PKG_CONFIG_set" != "xset"; then
31 AC_PATH_TOOL([PKG_CONFIG], [pkg-config])
33 if test -n "$PKG_CONFIG"; then
34 _pkg_min_version=m4_ifval([$1], [$1], [0.9.0])
35 AC_MSG_CHECKING([pkg-config is at least version $_pkg_min_version])
36 if $PKG_CONFIG --atleast-pkgconfig-version $_pkg_min_version; then
44 ])# PKG_PROG_PKG_CONFIG
46 # _PKG_CONFIG([VARIABLE], [COMMAND], [MODULES])
47 # ---------------------------------------------
48 m4_define([_PKG_CONFIG],
49 [if test "x$ac_cv_env_[]$1[]_set" = "xset"; then
50 pkg_cv_[]$1=$ac_cv_env_[]$1[]_value
51 elif test -n "$PKG_CONFIG"; then
52 if AC_RUN_LOG([$PKG_CONFIG --exists "$3" >/dev/null 2>&1]); then
53 pkg_cv_[]$1=`$PKG_CONFIG --[]$2 "$3" 2>/dev/null`
62 # PKG_CHECK_MODULES(VARIABLE-PREFIX, MODULES, [ACTION-IF-FOUND],
63 # [ACTION-IF-NOT-FOUND])
66 # Note that if there is a possibility the first call to
67 # PKG_CHECK_MODULES might not happen, you should be sure to include an
68 # explicit call to PKG_PROG_PKG_CONFIG in your configure.in
71 # --------------------------------------------------------------
72 AC_DEFUN([PKG_CHECK_MODULES],
73 [AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
74 AC_ARG_VAR([$1][_CFLAGS], [C compiler flags for $1, overriding pkg-config])dnl
75 AC_ARG_VAR([$1][_LIBS], [linker flags for $1, overriding pkg-config])dnl
78 AC_CACHE_CHECK([for $1][_CFLAGS], [pkg_cv_][$1][_CFLAGS],
79 [_PKG_CONFIG([$1][_CFLAGS], [cflags], [$2])])
80 AC_CACHE_CHECK([for $1][_LIBS], [pkg_cv_][$1][_LIBS],
81 [_PKG_CONFIG([$1][_LIBS], [libs], [$2])])
83 if test $pkg_failed = yes; then
84 $1[]_PKG_ERRORS=`$PKG_CONFIG --errors-to-stdout --print-errors "$2"`
85 # Put the nasty error message in config.log where it belongs
86 echo "$$1[]_PKG_ERRORS" 1>&AS_MESSAGE_LOG_FD
88 ifelse([$4], , [AC_MSG_ERROR(dnl
89 [Package requirements ($2) were not met.
90 Consider adjusting the PKG_CONFIG_PATH environment variable if you
91 installed software in a non-standard prefix.
93 Alternatively you may set the $1_CFLAGS and $1_LIBS environment variables
94 to avoid the need to call pkg-config. See the pkg-config man page for
97 elif test $pkg_failed = untried; then
98 ifelse([$4], , [AC_MSG_FAILURE(dnl
99 [The pkg-config script could not be found or is too old. Make sure it
100 is in your PATH or set the PKG_CONFIG environment variable to the full
103 Alternatively you may set the $1_CFLAGS and $1_LIBS environment variables
104 to avoid the need to call pkg-config. See the pkg-config man page for
107 To get pkg-config, see <http://www.freedesktop.org/software/pkgconfig>.])],
110 $1[]_CFLAGS=$pkg_cv_[]$1[]_CFLAGS
111 $1[]_LIBS=$pkg_cv_[]$1[]_LIBS
112 ifelse([$3], , :, [$3])
114 ])# PKG_CHECK_MODULES