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