Merge lp:~tangent-org/libmemcached/1.0-build/ Build: jenkins-Libmemcached-187
[m6w6/libmemcached] / m4 / pkg.m4
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 # ----------------------------------
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])
31 AC_ARG_VAR([PKG_CONFIG_PATH], [directories to add to pkg-config's search path])
32 AC_ARG_VAR([PKG_CONFIG_LIBDIR], [path overriding pkg-config's built-in search path])
33
34 if test "x$ac_cv_env_PKG_CONFIG_set" != "xset"; then
35 AC_PATH_TOOL([PKG_CONFIG], [pkg-config])
36 fi
37 if test -n "$PKG_CONFIG"; then
38 _pkg_min_version=m4_default([$1], [0.9.0])
39 AC_MSG_CHECKING([pkg-config is at least version $_pkg_min_version])
40 if $PKG_CONFIG --atleast-pkgconfig-version $_pkg_min_version; then
41 AC_MSG_RESULT([yes])
42 else
43 AC_MSG_RESULT([no])
44 PKG_CONFIG=""
45 fi
46 fi[]dnl
47 ])# PKG_PROG_PKG_CONFIG
48
49 # PKG_CHECK_EXISTS(MODULES, [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
50 #
51 # Check to see whether a particular set of modules exists. Similar
52 # to PKG_CHECK_MODULES(), but does not set variables or print errors.
53 #
54 # Please remember that m4 expands AC_REQUIRE([PKG_PROG_PKG_CONFIG])
55 # only at the first occurence in configure.ac, so if the first place
56 # it's called might be skipped (such as if it is within an "if", you
57 # have to call PKG_CHECK_EXISTS manually
58 # --------------------------------------------------------------
59 AC_DEFUN([PKG_CHECK_EXISTS],
60 [AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
61 if test -n "$PKG_CONFIG" && \
62 AC_RUN_LOG([$PKG_CONFIG --exists --print-errors "$1"]); then
63 m4_default([$2], [:])
64 m4_ifvaln([$3], [else
65 $3])dnl
66 fi])
67
68 # _PKG_CONFIG([VARIABLE], [COMMAND], [MODULES])
69 # ---------------------------------------------
70 m4_define([_PKG_CONFIG],
71 [if test -n "$$1"; then
72 pkg_cv_[]$1="$$1"
73 elif test -n "$PKG_CONFIG"; then
74 PKG_CHECK_EXISTS([$3],
75 [pkg_cv_[]$1=`$PKG_CONFIG --[]$2 "$3" 2>/dev/null`],
76 [pkg_failed=yes])
77 else
78 pkg_failed=untried
79 fi[]dnl
80 ])# _PKG_CONFIG
81
82 # _PKG_SHORT_ERRORS_SUPPORTED
83 # -----------------------------
84 AC_DEFUN([_PKG_SHORT_ERRORS_SUPPORTED],
85 [AC_REQUIRE([PKG_PROG_PKG_CONFIG])
86 if $PKG_CONFIG --atleast-pkgconfig-version 0.20; then
87 _pkg_short_errors_supported=yes
88 else
89 _pkg_short_errors_supported=no
90 fi[]dnl
91 ])# _PKG_SHORT_ERRORS_SUPPORTED
92
93
94 # PKG_CHECK_MODULES(VARIABLE-PREFIX, MODULES, [ACTION-IF-FOUND],
95 # [ACTION-IF-NOT-FOUND])
96 #
97 #
98 # Note that if there is a possibility the first call to
99 # PKG_CHECK_MODULES might not happen, you should be sure to include an
100 # explicit call to PKG_PROG_PKG_CONFIG in your configure.ac
101 #
102 #
103 # --------------------------------------------------------------
104 AC_DEFUN([PKG_CHECK_MODULES],
105 [AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
106 AC_ARG_VAR([$1][_CFLAGS], [C compiler flags for $1, overriding pkg-config])dnl
107 AC_ARG_VAR([$1][_LIBS], [linker flags for $1, overriding pkg-config])dnl
108
109 pkg_failed=no
110 AC_MSG_CHECKING([for $1])
111
112 _PKG_CONFIG([$1][_CFLAGS], [cflags], [$2])
113 _PKG_CONFIG([$1][_LIBS], [libs], [$2])
114
115 m4_define([_PKG_TEXT], [Alternatively, you may set the environment variables $1[]_CFLAGS
116 and $1[]_LIBS to avoid the need to call pkg-config.
117 See the pkg-config man page for more details.])
118
119 if test $pkg_failed = yes; then
120 AC_MSG_RESULT([no])
121 _PKG_SHORT_ERRORS_SUPPORTED
122 if test $_pkg_short_errors_supported = yes; then
123 $1[]_PKG_ERRORS=`$PKG_CONFIG --short-errors --print-errors "$2" 2>&1`
124 else
125 $1[]_PKG_ERRORS=`$PKG_CONFIG --print-errors "$2" 2>&1`
126 fi
127 # Put the nasty error message in config.log where it belongs
128 echo "$$1[]_PKG_ERRORS" >&AS_MESSAGE_LOG_FD
129
130 m4_default([$4], [AC_MSG_ERROR(
131 [Package requirements ($2) were not met:
132
133 $$1_PKG_ERRORS
134
135 Consider adjusting the PKG_CONFIG_PATH environment variable if you
136 installed software in a non-standard prefix.
137
138 _PKG_TEXT])
139 ])
140 elif test $pkg_failed = untried; then
141 AC_MSG_RESULT([no])
142 m4_default([$4], [AC_MSG_FAILURE(
143 [The pkg-config script could not be found or is too old. Make sure it
144 is in your PATH or set the PKG_CONFIG environment variable to the full
145 path to pkg-config.
146
147 _PKG_TEXT
148
149 To get pkg-config, see <http://pkg-config.freedesktop.org/>.])
150 ])
151 else
152 $1[]_CFLAGS=$pkg_cv_[]$1[]_CFLAGS
153 $1[]_LIBS=$pkg_cv_[]$1[]_LIBS
154 AC_MSG_RESULT([yes])
155 $3
156 fi[]dnl
157 ])# PKG_CHECK_MODULES