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1 | # pkg.m4 - Macros to locate and utilise pkg-config. -*- Autoconf -*- |
2 | # | |
3 | # Copyright © 2004 Scott James Remnant <scott@netsplit.com>. | |
4 | # | |
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. | |
9 | # | |
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. | |
14 | # | |
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. | |
18 | # | |
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. | |
23 | ||
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$ac_cv_env_PKG_CONFIG_set" != "xset"; then | |
31 | AC_PATH_TOOL([PKG_CONFIG], [pkg-config]) | |
32 | fi | |
33 | if test -n "$PKG_CONFIG"; then | |
34 | _pkg_min_version=m4_default([$1], [0.9.0]) | |
35 | AC_MSG_CHECKING([pkg-config is at least version $_pkg_min_version]) | |
36 | if $PKG_CONFIG --atleast-pkgconfig-version $_pkg_min_version; then | |
37 | AC_MSG_RESULT([yes]) | |
38 | else | |
39 | AC_MSG_RESULT([no]) | |
40 | PKG_CONFIG="" | |
41 | fi | |
42 | ||
43 | fi[]dnl | |
44 | ])# PKG_PROG_PKG_CONFIG | |
45 | ||
46 | # PKG_CHECK_EXISTS(MODULES, [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND]) | |
47 | # | |
48 | # Check to see whether a particular set of modules exists. Similar | |
49 | # to PKG_CHECK_MODULES(), but does not set variables or print errors. | |
50 | # | |
51 | # | |
52 | # Similar to PKG_CHECK_MODULES, make sure that the first instance of | |
53 | # this or PKG_CHECK_MODULES is called, or make sure to call | |
54 | # PKG_CHECK_EXISTS manually | |
55 | # -------------------------------------------------------------- | |
56 | AC_DEFUN([PKG_CHECK_EXISTS], | |
57 | [AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl | |
58 | if test -n "$PKG_CONFIG" && \ | |
59 | AC_RUN_LOG([$PKG_CONFIG --exists --print-errors "$1"]); then | |
60 | m4_ifval([$2], [$2], [:]) | |
61 | m4_ifvaln([$3], [else | |
62 | $3])dnl | |
63 | fi]) | |
64 | ||
65 | ||
66 | # _PKG_CONFIG([VARIABLE], [COMMAND], [MODULES]) | |
67 | # --------------------------------------------- | |
68 | m4_define([_PKG_CONFIG], | |
69 | [if test -n "$$1"; then | |
70 | pkg_cv_[]$1="$$1" | |
71 | elif test -n "$PKG_CONFIG"; then | |
72 | PKG_CHECK_EXISTS([$3], | |
73 | [pkg_cv_[]$1=`$PKG_CONFIG --[]$2 "$3" 2>/dev/null`], | |
74 | [pkg_failed=yes]) | |
75 | else | |
76 | pkg_failed=untried | |
77 | fi[]dnl | |
78 | ])# _PKG_CONFIG | |
79 | ||
80 | # _PKG_SHORT_ERRORS_SUPPORTED | |
81 | # ----------------------------- | |
82 | AC_DEFUN([_PKG_SHORT_ERRORS_SUPPORTED], | |
83 | [AC_REQUIRE([PKG_PROG_PKG_CONFIG]) | |
84 | if $PKG_CONFIG --atleast-pkgconfig-version 0.20; then | |
85 | _pkg_short_errors_supported=yes | |
86 | else | |
87 | _pkg_short_errors_supported=no | |
88 | fi[]dnl | |
89 | ])# _PKG_SHORT_ERRORS_SUPPORTED | |
90 | ||
91 | ||
92 | # PKG_CHECK_MODULES(VARIABLE-PREFIX, MODULES, [ACTION-IF-FOUND], | |
93 | # [ACTION-IF-NOT-FOUND]) | |
94 | # | |
95 | # | |
96 | # Note that if there is a possibility the first call to | |
97 | # PKG_CHECK_MODULES might not happen, you should be sure to include an | |
98 | # explicit call to PKG_PROG_PKG_CONFIG in your configure.ac | |
99 | # | |
100 | # | |
101 | # -------------------------------------------------------------- | |
102 | AC_DEFUN([PKG_CHECK_MODULES], | |
103 | [AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl | |
104 | AC_ARG_VAR([$1][_CFLAGS], [C compiler flags for $1, overriding pkg-config])dnl | |
105 | AC_ARG_VAR([$1][_LIBS], [linker flags for $1, overriding pkg-config])dnl | |
106 | ||
107 | pkg_failed=no | |
108 | AC_MSG_CHECKING([for $1]) | |
109 | ||
110 | _PKG_CONFIG([$1][_CFLAGS], [cflags], [$2]) | |
111 | _PKG_CONFIG([$1][_LIBS], [libs], [$2]) | |
112 | ||
113 | m4_define([_PKG_TEXT], [Alternatively, you may set the environment variables $1[]_CFLAGS | |
114 | and $1[]_LIBS to avoid the need to call pkg-config. | |
115 | See the pkg-config man page for more details.]) | |
116 | ||
117 | if test $pkg_failed = yes; then | |
118 | _PKG_SHORT_ERRORS_SUPPORTED | |
119 | if test $_pkg_short_errors_supported = yes; then | |
120 | $1[]_PKG_ERRORS=`$PKG_CONFIG --short-errors --print-errors "$2" 2>&1` | |
121 | else | |
122 | $1[]_PKG_ERRORS=`$PKG_CONFIG --print-errors "$2" 2>&1` | |
123 | fi | |
124 | # Put the nasty error message in config.log where it belongs | |
125 | echo "$$1[]_PKG_ERRORS" >&AS_MESSAGE_LOG_FD | |
126 | ||
127 | ifelse([$4], , [AC_MSG_ERROR(dnl | |
128 | [Package requirements ($2) were not met: | |
129 | ||
130 | $$1_PKG_ERRORS | |
131 | ||
132 | Consider adjusting the PKG_CONFIG_PATH environment variable if you | |
133 | installed software in a non-standard prefix. | |
134 | ||
135 | _PKG_TEXT | |
136 | ])], | |
137 | [AC_MSG_RESULT([no]) | |
138 | $4]) | |
139 | elif test $pkg_failed = untried; then | |
140 | ifelse([$4], , [AC_MSG_FAILURE(dnl | |
141 | [The pkg-config script could not be found or is too old. Make sure it | |
142 | is in your PATH or set the PKG_CONFIG environment variable to the full | |
143 | path to pkg-config. | |
144 | ||
145 | _PKG_TEXT | |
146 | ||
147 | To get pkg-config, see <http://pkg-config.freedesktop.org/>.])], | |
148 | [$4]) | |
149 | else | |
150 | $1[]_CFLAGS=$pkg_cv_[]$1[]_CFLAGS | |
151 | $1[]_LIBS=$pkg_cv_[]$1[]_LIBS | |
152 | AC_MSG_RESULT([yes]) | |
153 | ifelse([$3], , :, [$3]) | |
154 | fi[]dnl | |
155 | ])# PKG_CHECK_MODULES |