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 3 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.
25 # PKG_PROG_PKG_CONFIG([MIN-VERSION])
26 # ----------------------------------
27 AC_DEFUN([PKG_PROG_PKG_CONFIG],
28 [m4_pattern_forbid([^_?PKG_[A-Z_]+$])
29 m4_pattern_allow([^PKG_CONFIG(_PATH)?$])
30 AC_ARG_VAR([PKG_CONFIG], [path to pkg-config utility])dnl
31 if test x$cross_compiling = xno; then
32 if test "x$ac_cv_env_PKG_CONFIG_set" != "xset"; then
33 AC_PATH_TOOL([PKG_CONFIG], [pkg-config], ,[${pathlist}])
35 if test -n "$PKG_CONFIG"; then
36 _pkg_min_version=m4_ifval([$1], [$1], [0.9.0])
37 AC_MSG_CHECKING([pkg-config is at least version $_pkg_min_version])
38 if $PKG_CONFIG --atleast-pkgconfig-version $_pkg_min_version; then
46 PKG_CONFIG=$ac_cv_env_PKG_CONFIG_value
49 ])# PKG_PROG_PKG_CONFIG
51 # PKG_CHECK_EXISTS(MODULES, [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
53 # Check to see whether a particular set of modules exists. Similar
54 # to PKG_CHECK_MODULES(), but does not set variables or print errors.
57 # Similar to PKG_CHECK_MODULES, make sure that the first instance of
58 # this or PKG_CHECK_MODULES is called, or make sure to call
59 # PKG_CHECK_EXISTS manually
60 # --------------------------------------------------------------
61 AC_DEFUN([PKG_CHECK_EXISTS],
62 [AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
63 if test -n "$PKG_CONFIG" && \
64 AC_RUN_LOG([$PKG_CONFIG --exists --print-errors "$1"]); then
65 m4_ifval([$2], [$2], [:])
71 # _PKG_CONFIG([VARIABLE], [COMMAND], [MODULES])
72 # ---------------------------------------------
73 m4_define([_PKG_CONFIG],
74 [if test -n "$PKG_CONFIG"; then
75 PKG_CHECK_EXISTS([$3],
76 [pkg_cv_[]$1=`$PKG_CONFIG --[]$2 "$3" 2>/dev/null`],
83 # PKG_CHECK_MODULES(VARIABLE-PREFIX, MODULES, [ACTION-IF-FOUND],
84 # [ACTION-IF-NOT-FOUND])
87 # Note that if there is a possibility the first call to
88 # PKG_CHECK_MODULES might not happen, you should be sure to include an
89 # explicit call to PKG_PROG_PKG_CONFIG in your configure.ac
92 # --------------------------------------------------------------
93 AC_DEFUN([PKG_CHECK_MODULES],
94 [AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
95 AC_ARG_VAR([$1][_CFLAGS], [C compiler flags for $1, overriding pkg-config])dnl
96 AC_ARG_VAR([$1][_LIBS], [linker flags for $1, overriding pkg-config])dnl
99 AC_MSG_CHECKING([for $1])
101 _PKG_CONFIG([$1][_CFLAGS], [cflags], [$2])
102 _PKG_CONFIG([$1][_LIBS], [libs], [$2])
104 if test $pkg_failed = yes; then
105 $1[]_PKG_ERRORS=`$PKG_CONFIG --errors-to-stdout --print-errors "$2"`
106 # Put the nasty error message in config.log where it belongs
107 echo "$$1[]_PKG_ERRORS" 1>&AS_MESSAGE_LOG_FD
109 ifelse([$4], , [AC_MSG_ERROR(dnl
110 [Package requirements ($2) were not met.
111 Consider adjusting the PKG_CONFIG_PATH environment variable if you
112 installed software in a non-standard prefix.
114 Alternatively you may set the $1_CFLAGS and $1_LIBS environment variables
115 to avoid the need to call pkg-config. See the pkg-config man page for
118 elif test $pkg_failed = untried; then
119 ifelse([$4], , [AC_MSG_FAILURE(dnl
120 [The pkg-config script could not be found or is too old. Make sure it
121 is in your PATH or set the PKG_CONFIG environment variable to the full
124 Alternatively you may set the $1_CFLAGS and $1_LIBS environment variables
125 to avoid the need to call pkg-config. See the pkg-config man page for
128 To get pkg-config, see <http://www.freedesktop.org/software/pkgconfig>.])],
131 $1[]_CFLAGS=$pkg_cv_[]$1[]_CFLAGS
132 $1[]_LIBS=$pkg_cv_[]$1[]_LIBS
134 ifelse([$3], , :, [$3])
136 ])# PKG_CHECK_MODULES
141 # indent-tabs-mode: nil