Fri, 04 Jan 2013 16:56:37 +0100
8005692: build-infra: Target "all" should do the right thing
Reviewed-by: tbell
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.
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 $_pkg_min_version; then
37 AC_MSG_RESULT([yes])
38 else
39 AC_MSG_RESULT([no])
40 PKG_CONFIG=""
41 fi
43 fi[]dnl
44 ])# PKG_PROG_PKG_CONFIG
46 # PKG_CHECK_EXISTS(MODULES, [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
47 #
48 # Check to see whether a particular set of modules exists. Similar
49 # to PKG_CHECK_MODULES(), but does not set variables or print errors.
50 #
51 #
52 # Similar to PKG_CHECK_MODULES, make sure that the first instance of
53 # this or PKG_CHECK_MODULES is called, or make sure to call
54 # PKG_CHECK_EXISTS manually
55 # --------------------------------------------------------------
56 AC_DEFUN([PKG_CHECK_EXISTS],
57 [AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
58 if test -n "$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])
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
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
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
107 pkg_failed=no
108 AC_MSG_CHECKING([for $1])
110 _PKG_CONFIG([$1][_CFLAGS], [cflags], [$2])
111 _PKG_CONFIG([$1][_LIBS], [libs], [$2])
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.])
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 "$$1[]_PKG_ERRORS" >&AS_MESSAGE_LOG_FD
127 ifelse([$4], , [AC_MSG_ERROR(dnl
128 [Package requirements ($2) were not met:
130 $$1_PKG_ERRORS
132 Consider adjusting the PKG_CONFIG_PATH environment variable if you
133 installed software in a non-standard prefix.
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.
145 _PKG_TEXT
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