source: m4/pkg.m4 @ 3234121

release-1.8release-1.9
Last change on this file since 3234121 was 650fb2c, checked in by Anders Kaseorg <andersk@mit.edu>, 10 years ago
Update autoconf macros from pkg-config Signed-off-by: Anders Kaseorg <andersk@mit.edu>
  • Property mode set to 100644
File size: 5.5 KB
Line 
1# pkg.m4 - Macros to locate and utilise pkg-config.            -*- Autoconf -*-
2# serial 1 (pkg-config-0.24)
3#
4# Copyright © 2004 Scott James Remnant <scott@netsplit.com>.
5#
6# This program is free software; you can redistribute it and/or modify
7# it under the terms of the GNU General Public License as published by
8# the Free Software Foundation; either version 2 of the License, or
9# (at your option) any later version.
10#
11# This program is distributed in the hope that it will be useful, but
12# WITHOUT ANY WARRANTY; without even the implied warranty of
13# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14# General Public License for more details.
15#
16# You should have received a copy of the GNU General Public License
17# along with this program; if not, write to the Free Software
18# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19#
20# As a special exception to the GNU General Public License, if you
21# distribute this file as part of a program that contains a
22# configuration script generated by Autoconf, you may include it under
23# the same distribution terms that you use for the rest of that program.
24
25# PKG_PROG_PKG_CONFIG([MIN-VERSION])
26# ----------------------------------
27AC_DEFUN([PKG_PROG_PKG_CONFIG],
28[m4_pattern_forbid([^_?PKG_[A-Z_]+$])
29m4_pattern_allow([^PKG_CONFIG(_(PATH|LIBDIR|SYSROOT_DIR|ALLOW_SYSTEM_(CFLAGS|LIBS)))?$])
30m4_pattern_allow([^PKG_CONFIG_(DISABLE_UNINSTALLED|TOP_BUILD_DIR|DEBUG_SPEW)$])
31AC_ARG_VAR([PKG_CONFIG], [path to pkg-config utility])
32AC_ARG_VAR([PKG_CONFIG_PATH], [directories to add to pkg-config's search path])
33AC_ARG_VAR([PKG_CONFIG_LIBDIR], [path overriding pkg-config's built-in search path])
34
35if test "x$ac_cv_env_PKG_CONFIG_set" != "xset"; then
36        AC_PATH_TOOL([PKG_CONFIG], [pkg-config])
37fi
38if test -n "$PKG_CONFIG"; then
39        _pkg_min_version=m4_default([$1], [0.9.0])
40        AC_MSG_CHECKING([pkg-config is at least version $_pkg_min_version])
41        if $PKG_CONFIG --atleast-pkgconfig-version $_pkg_min_version; then
42                AC_MSG_RESULT([yes])
43        else
44                AC_MSG_RESULT([no])
45                PKG_CONFIG=""
46        fi
47fi[]dnl
48])# PKG_PROG_PKG_CONFIG
49
50# PKG_CHECK_EXISTS(MODULES, [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
51#
52# Check to see whether a particular set of modules exists.  Similar
53# to PKG_CHECK_MODULES(), but does not set variables or print errors.
54#
55# Please remember that m4 expands AC_REQUIRE([PKG_PROG_PKG_CONFIG])
56# only at the first occurence in configure.ac, so if the first place
57# it's called might be skipped (such as if it is within an "if", you
58# have to call PKG_CHECK_EXISTS manually
59# --------------------------------------------------------------
60AC_DEFUN([PKG_CHECK_EXISTS],
61[AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
62if test -n "$PKG_CONFIG" && \
63    AC_RUN_LOG([$PKG_CONFIG --exists --print-errors "$1"]); then
64  m4_default([$2], [:])
65m4_ifvaln([$3], [else
66  $3])dnl
67fi])
68
69# _PKG_CONFIG([VARIABLE], [COMMAND], [MODULES])
70# ---------------------------------------------
71m4_define([_PKG_CONFIG],
72[if test -n "$$1"; then
73    pkg_cv_[]$1="$$1"
74 elif test -n "$PKG_CONFIG"; then
75    PKG_CHECK_EXISTS([$3],
76                     [pkg_cv_[]$1=`$PKG_CONFIG --[]$2 "$3" 2>/dev/null`
77                      test "x$?" != "x0" && pkg_failed=yes ],
78                     [pkg_failed=yes])
79 else
80    pkg_failed=untried
81fi[]dnl
82])# _PKG_CONFIG
83
84# _PKG_SHORT_ERRORS_SUPPORTED
85# -----------------------------
86AC_DEFUN([_PKG_SHORT_ERRORS_SUPPORTED],
87[AC_REQUIRE([PKG_PROG_PKG_CONFIG])
88if $PKG_CONFIG --atleast-pkgconfig-version 0.20; then
89        _pkg_short_errors_supported=yes
90else
91        _pkg_short_errors_supported=no
92fi[]dnl
93])# _PKG_SHORT_ERRORS_SUPPORTED
94
95
96# PKG_CHECK_MODULES(VARIABLE-PREFIX, MODULES, [ACTION-IF-FOUND],
97# [ACTION-IF-NOT-FOUND])
98#
99#
100# Note that if there is a possibility the first call to
101# PKG_CHECK_MODULES might not happen, you should be sure to include an
102# explicit call to PKG_PROG_PKG_CONFIG in your configure.ac
103#
104#
105# --------------------------------------------------------------
106AC_DEFUN([PKG_CHECK_MODULES],
107[AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
108AC_ARG_VAR([$1][_CFLAGS], [C compiler flags for $1, overriding pkg-config])dnl
109AC_ARG_VAR([$1][_LIBS], [linker flags for $1, overriding pkg-config])dnl
110
111pkg_failed=no
112AC_MSG_CHECKING([for $1])
113
114_PKG_CONFIG([$1][_CFLAGS], [cflags], [$2])
115_PKG_CONFIG([$1][_LIBS], [libs], [$2])
116
117m4_define([_PKG_TEXT], [Alternatively, you may set the environment variables $1[]_CFLAGS
118and $1[]_LIBS to avoid the need to call pkg-config.
119See the pkg-config man page for more details.])
120
121if test $pkg_failed = yes; then
122        AC_MSG_RESULT([no])
123        _PKG_SHORT_ERRORS_SUPPORTED
124        if test $_pkg_short_errors_supported = yes; then
125                $1[]_PKG_ERRORS=`$PKG_CONFIG --short-errors --print-errors --cflags --libs "$2" 2>&1`
126        else
127                $1[]_PKG_ERRORS=`$PKG_CONFIG --print-errors --cflags --libs "$2" 2>&1`
128        fi
129        # Put the nasty error message in config.log where it belongs
130        echo "$$1[]_PKG_ERRORS" >&AS_MESSAGE_LOG_FD
131
132        m4_default([$4], [AC_MSG_ERROR(
133[Package requirements ($2) were not met:
134
135$$1_PKG_ERRORS
136
137Consider adjusting the PKG_CONFIG_PATH environment variable if you
138installed software in a non-standard prefix.
139
140_PKG_TEXT])[]dnl
141        ])
142elif test $pkg_failed = untried; then
143        AC_MSG_RESULT([no])
144        m4_default([$4], [AC_MSG_FAILURE(
145[The pkg-config script could not be found or is too old.  Make sure it
146is in your PATH or set the PKG_CONFIG environment variable to the full
147path to pkg-config.
148
149_PKG_TEXT
150
151To get pkg-config, see <http://pkg-config.freedesktop.org/>.])[]dnl
152        ])
153else
154        $1[]_CFLAGS=$pkg_cv_[]$1[]_CFLAGS
155        $1[]_LIBS=$pkg_cv_[]$1[]_LIBS
156        AC_MSG_RESULT([yes])
157        $3
158fi[]dnl
159])# PKG_CHECK_MODULES
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