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, see <http://www.gnu.org/licenses/>.
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# ----------------------------------
26AC_DEFUN([PKG_PROG_PKG_CONFIG],
27[m4_pattern_forbid([^_?PKG_[A-Z_]+$])
28m4_pattern_allow([^PKG_CONFIG(_(PATH|LIBDIR|SYSROOT_DIR|ALLOW_SYSTEM_(CFLAGS|LIBS)))?$])
29m4_pattern_allow([^PKG_CONFIG_(DISABLE_UNINSTALLED|TOP_BUILD_DIR|DEBUG_SPEW)$])
30AC_ARG_VAR([PKG_CONFIG], [path to pkg-config utility])
31AC_ARG_VAR([PKG_CONFIG_PATH], [directories to add to pkg-config's search path])
32AC_ARG_VAR([PKG_CONFIG_LIBDIR], [path overriding pkg-config's built-in search path])
33
34if test "x$ac_cv_env_PKG_CONFIG_set" != "xset"; then
35	AC_PATH_TOOL([PKG_CONFIG], [pkg-config])
36fi
37if 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 $_pkg_min_version; then
41		AC_MSG_RESULT([yes])
42	else
43		AC_MSG_RESULT([no])
44		PKG_CONFIG=""
45	fi
46fi[]dnl
47])# PKG_PROG_PKG_CONFIG
48
49# PKG_CHECK_EXISTS(MODULES, [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
50#
51# Check to see whether a particular set of modules exists.  Similar
52# to PKG_CHECK_MODULES(), but does not set variables or print errors.
53#
54# Please remember that m4 expands AC_REQUIRE([PKG_PROG_PKG_CONFIG])
55# only at the first occurence in configure.ac, so if the first place
56# it's called might be skipped (such as if it is within an "if", you
57# have to call PKG_CHECK_EXISTS manually
58# --------------------------------------------------------------
59AC_DEFUN([PKG_CHECK_EXISTS],
60[AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
61if test -n "$PKG_CONFIG" && \
62    AC_RUN_LOG([$PKG_CONFIG --exists --print-errors "$1"]); then
63  m4_default([$2], [:])
64m4_ifvaln([$3], [else
65  $3])dnl
66fi])
67
68# _PKG_CONFIG([VARIABLE], [COMMAND], [MODULES])
69# ---------------------------------------------
70m4_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 "$3" 2>/dev/null`
76		      test "x$?" != "x0" && pkg_failed=yes ],
77		     [pkg_failed=yes])
78 else
79    pkg_failed=untried
80fi[]dnl
81])# _PKG_CONFIG
82
83# _PKG_SHORT_ERRORS_SUPPORTED
84# -----------------------------
85AC_DEFUN([_PKG_SHORT_ERRORS_SUPPORTED],
86[AC_REQUIRE([PKG_PROG_PKG_CONFIG])
87if $PKG_CONFIG --atleast-pkgconfig-version 0.20; then
88        _pkg_short_errors_supported=yes
89else
90        _pkg_short_errors_supported=no
91fi[]dnl
92])# _PKG_SHORT_ERRORS_SUPPORTED
93
94
95# PKG_CHECK_MODULES(VARIABLE-PREFIX, MODULES, [ACTION-IF-FOUND],
96# [ACTION-IF-NOT-FOUND])
97#
98#
99# Note that if there is a possibility the first call to
100# PKG_CHECK_MODULES might not happen, you should be sure to include an
101# explicit call to PKG_PROG_PKG_CONFIG in your configure.ac
102#
103#
104# --------------------------------------------------------------
105AC_DEFUN([PKG_CHECK_MODULES],
106[AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
107AC_ARG_VAR([$1][_CFLAGS], [C compiler flags for $1, overriding pkg-config])dnl
108AC_ARG_VAR([$1][_LIBS], [linker flags for $1, overriding pkg-config])dnl
109
110pkg_failed=no
111AC_MSG_CHECKING([for $1])
112
113_PKG_CONFIG([$1][_CFLAGS], [cflags], [$2])
114_PKG_CONFIG([$1][_LIBS], [libs], [$2])
115
116m4_define([_PKG_TEXT], [Alternatively, you may set the environment variables $1[]_CFLAGS
117and $1[]_LIBS to avoid the need to call pkg-config.
118See the pkg-config man page for more details.])
119
120if test $pkg_failed = yes; then
121   	AC_MSG_RESULT([no])
122        _PKG_SHORT_ERRORS_SUPPORTED
123        if test $_pkg_short_errors_supported = yes; then
124	        $1[]_PKG_ERRORS=`$PKG_CONFIG --short-errors --print-errors --cflags --libs "$2" 2>&1`
125        else
126	        $1[]_PKG_ERRORS=`$PKG_CONFIG --print-errors --cflags --libs "$2" 2>&1`
127        fi
128	# Put the nasty error message in config.log where it belongs
129	echo "$$1[]_PKG_ERRORS" >&AS_MESSAGE_LOG_FD
130
131	m4_default([$4], [AC_MSG_ERROR(
132[Package requirements ($2) were not met:
133
134$$1_PKG_ERRORS
135
136Consider adjusting the PKG_CONFIG_PATH environment variable if you
137installed software in a non-standard prefix.
138
139_PKG_TEXT])[]dnl
140        ])
141elif test $pkg_failed = untried; then
142     	AC_MSG_RESULT([no])
143	m4_default([$4], [AC_MSG_FAILURE(
144[The pkg-config script could not be found or is too old.  Make sure it
145is in your PATH or set the PKG_CONFIG environment variable to the full
146path to pkg-config.
147
148_PKG_TEXT
149
150To get pkg-config, see <http://pkg-config.freedesktop.org/>.])[]dnl
151        ])
152else
153	$1[]_CFLAGS=$pkg_cv_[]$1[]_CFLAGS
154	$1[]_LIBS=$pkg_cv_[]$1[]_LIBS
155        AC_MSG_RESULT([yes])
156	$3
157fi[]dnl
158])# PKG_CHECK_MODULES
159
160
161# PKG_CHECK_MODULES_STATIC(VARIABLE-PREFIX, MODULES, [ACTION-IF-FOUND],
162# [ACTION-IF-NOT-FOUND])
163# ---------------------------------------------------------------------
164# Checks for existence of MODULES and gathers its build flags with
165# static libraries enabled. Sets VARIABLE-PREFIX_CFLAGS from --cflags
166# and VARIABLE-PREFIX_LIBS from --libs.
167#
168# Note that if there is a possibility the first call to
169# PKG_CHECK_MODULES_STATIC might not happen, you should be sure to include
170# an explicit call to PKG_PROG_PKG_CONFIG in your configure.ac.
171AC_DEFUN([PKG_CHECK_MODULES_STATIC],
172[AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
173_save_PKG_CONFIG=$PKG_CONFIG
174PKG_CONFIG="$PKG_CONFIG --static"
175PKG_CHECK_MODULES($@)
176PKG_CONFIG=$_save_PKG_CONFIG[]dnl
177])
178
179
180# PKG_INSTALLDIR(DIRECTORY)
181# -------------------------
182# Substitutes the variable pkgconfigdir as the location where a module
183# should install pkg-config .pc files. By default the directory is
184# $libdir/pkgconfig, but the default can be changed by passing
185# DIRECTORY. The user can override through the --with-pkgconfigdir
186# parameter.
187AC_DEFUN([PKG_INSTALLDIR],
188[m4_pushdef([pkg_default], [m4_default([$1], ['${libdir}/pkgconfig'])])
189m4_pushdef([pkg_description],
190    [pkg-config installation directory @<:@]pkg_default[@:>@])
191AC_ARG_WITH([pkgconfigdir],
192    [AS_HELP_STRING([--with-pkgconfigdir], pkg_description)],,
193    [with_pkgconfigdir=]pkg_default)
194AC_SUBST([pkgconfigdir], [$with_pkgconfigdir])
195m4_popdef([pkg_default])
196m4_popdef([pkg_description])
197]) dnl PKG_INSTALLDIR
198
199
200# PKG_NOARCH_INSTALLDIR(DIRECTORY)
201# -------------------------
202# Substitutes the variable noarch_pkgconfigdir as the location where a
203# module should install arch-independent pkg-config .pc files. By
204# default the directory is $datadir/pkgconfig, but the default can be
205# changed by passing DIRECTORY. The user can override through the
206# --with-noarch-pkgconfigdir parameter.
207AC_DEFUN([PKG_NOARCH_INSTALLDIR],
208[m4_pushdef([pkg_default], [m4_default([$1], ['${datadir}/pkgconfig'])])
209m4_pushdef([pkg_description],
210    [pkg-config arch-independent installation directory @<:@]pkg_default[@:>@])
211AC_ARG_WITH([noarch-pkgconfigdir],
212    [AS_HELP_STRING([--with-noarch-pkgconfigdir], pkg_description)],,
213    [with_noarch_pkgconfigdir=]pkg_default)
214AC_SUBST([noarch_pkgconfigdir], [$with_noarch_pkgconfigdir])
215m4_popdef([pkg_default])
216m4_popdef([pkg_description])
217]) dnl PKG_NOARCH_INSTALLDIR
218
219
220# PKG_CHECK_VAR(VARIABLE, MODULE, CONFIG-VARIABLE,
221# [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
222# -------------------------------------------
223# Retrieves the value of the pkg-config variable for the given module.
224AC_DEFUN([PKG_CHECK_VAR],
225[AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
226AC_ARG_VAR([$1], [value of $3 for $2, overriding pkg-config])dnl
227
228_PKG_CONFIG([$1], [variable="][$3]["], [$2])
229AS_VAR_COPY([$1], [pkg_cv_][$1])
230
231AS_VAR_IF([$1], [""], [$5], [$4])dnl
232])# PKG_CHECK_VAR
233