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# ---------------------------------- 26AC_DEFUN([PKG_PROG_PKG_CONFIG], 27[m4_pattern_forbid([^_?PKG_[A-Z_]+$]) 28m4_pattern_allow([^PKG_CONFIG(_PATH)?$]) 29AC_ARG_VAR([PKG_CONFIG], [path to pkg-config utility])dnl 30if test "x$ac_cv_env_PKG_CONFIG_set" != "xset"; then 31 AC_PATH_TOOL([PKG_CONFIG], [pkg-config]) 32fi 33if test -n "$PKG_CONFIG"; then 34 _pkg_min_version=m4_ifval([$1], [$1], [0.9.0]) 35 AC_MSG_CHECKING([pkg-config is at least version $_pkg_min_version]) 36 if $PKG_CONFIG --atleast-pkgconfig-version $_pkg_min_version; then 37 AC_MSG_RESULT([yes]) 38 else 39 AC_MSG_RESULT([no]) 40 PKG_CONFIG="" 41 fi 42 43fi[]dnl 44])# PKG_PROG_PKG_CONFIG 45 46# PKG_CHECK_EXISTS(MODULES, [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND]) 47# 48# Check to see whether a particular set of modules exists. Similar 49# to PKG_CHECK_MODULES(), but does not set variables or print errors. 50# 51# 52# Similar to PKG_CHECK_MODULES, make sure that the first instance of 53# this or PKG_CHECK_MODULES is called, or make sure to call 54# PKG_CHECK_EXISTS manually 55# -------------------------------------------------------------- 56AC_DEFUN([PKG_CHECK_EXISTS], 57[AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl 58if test -n "$PKG_CONFIG" && \ 59 AC_RUN_LOG([$PKG_CONFIG --exists --print-errors "$1"]); then 60 m4_ifval([$2], [$2], [:]) 61m4_ifvaln([$3], [else 62 $3])dnl 63fi]) 64 65 66# _PKG_CONFIG([VARIABLE], [COMMAND], [MODULES]) 67# --------------------------------------------- 68m4_define([_PKG_CONFIG], 69[if test -n "$PKG_CONFIG"; then 70 if test -n "$$1"; then 71 pkg_cv_[]$1="$$1" 72 else 73 PKG_CHECK_EXISTS([$3], 74 [pkg_cv_[]$1=`$PKG_CONFIG --[]$2 "$3" 2>/dev/null`], 75 [pkg_failed=yes]) 76 fi 77else 78 pkg_failed=untried 79fi[]dnl 80])# _PKG_CONFIG 81 82# PKG_CHECK_MODULES(VARIABLE-PREFIX, MODULES, [ACTION-IF-FOUND], 83# [ACTION-IF-NOT-FOUND]) 84# 85# 86# Note that if there is a possibility the first call to 87# PKG_CHECK_MODULES might not happen, you should be sure to include an 88# explicit call to PKG_PROG_PKG_CONFIG in your configure.ac 89# 90# 91# -------------------------------------------------------------- 92AC_DEFUN([PKG_CHECK_MODULES], 93[AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl 94AC_ARG_VAR([$1][_CFLAGS], [C compiler flags for $1, overriding pkg-config])dnl 95AC_ARG_VAR([$1][_LIBS], [linker flags for $1, overriding pkg-config])dnl 96 97pkg_failed=no 98AC_MSG_CHECKING([for $1]) 99 100_PKG_CONFIG([$1][_CFLAGS], [cflags], [$2]) 101_PKG_CONFIG([$1][_LIBS], [libs], [$2]) 102 103if test $pkg_failed = yes; then 104 $1[]_PKG_ERRORS=`$PKG_CONFIG --errors-to-stdout --print-errors "$2"` 105 # Put the nasty error message in config.log where it belongs 106 echo "$$1[]_PKG_ERRORS" 1>&AS_MESSAGE_LOG_FD 107 108 ifelse([$4], , [AC_MSG_ERROR(dnl 109[Package requirements ($2) were not met. 110Consider adjusting the PKG_CONFIG_PATH environment variable if you 111installed software in a non-standard prefix. 112 113Alternatively you may set the $1_CFLAGS and $1_LIBS environment variables 114to avoid the need to call pkg-config. See the pkg-config man page for 115more details.])], 116 [$4]) 117elif test $pkg_failed = untried; then 118 ifelse([$4], , [AC_MSG_FAILURE(dnl 119[The pkg-config script could not be found or is too old. Make sure it 120is in your PATH or set the PKG_CONFIG environment variable to the full 121path to pkg-config. 122 123Alternatively you may set the $1_CFLAGS and $1_LIBS environment variables 124to avoid the need to call pkg-config. See the pkg-config man page for 125more details. 126 127To get pkg-config, see <http://www.freedesktop.org/software/pkgconfig>.])], 128 [$4]) 129else 130 $1[]_CFLAGS=$pkg_cv_[]$1[]_CFLAGS 131 $1[]_LIBS=$pkg_cv_[]$1[]_LIBS 132 AC_MSG_RESULT([yes]) 133 ifelse([$3], , :, [$3]) 134fi[]dnl 135])# PKG_CHECK_MODULES 136