1 # pkg.m4 - Macros to locate and utilise pkg-config. -*- Autoconf -*- 2 # 3 # Copyright 2004 Scott James Remnant <scott (a] 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 # ---------------------------------- 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 $_pkg_min_version; then 37 AC_MSG_RESULT([yes]) 38 else 39 AC_MSG_RESULT([no]) 40 PKG_CONFIG="" 41 fi 42 43 fi[]dnl 44 ])# PKG_PROG_PKG_CONFIG 45 46 # PKG_CHECK_EXISTS(MODULES, [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND]) 47 # 48 # Check to see whether a particular set of modules exists. Similar 49 # to PKG_CHECK_MODULES(), but does not set variables or print errors. 50 # 51 # 52 # Similar to PKG_CHECK_MODULES, make sure that the first instance of 53 # this or PKG_CHECK_MODULES is called, or make sure to call 54 # PKG_CHECK_EXISTS manually 55 # -------------------------------------------------------------- 56 AC_DEFUN([PKG_CHECK_EXISTS], 57 [AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl 58 if test -n "$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]) 64 65 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 79 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 90 91 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 106 107 pkg_failed=no 108 AC_MSG_CHECKING([for $1]) 109 110 _PKG_CONFIG([$1][_CFLAGS], [cflags], [$2]) 111 _PKG_CONFIG([$1][_LIBS], [libs], [$2]) 112 113 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.]) 116 117 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 "$$1[]_PKG_ERRORS" >&AS_MESSAGE_LOG_FD 126 127 ifelse([$4], , [AC_MSG_ERROR(dnl 128 [Package requirements ($2) were not met: 129 130 $$1_PKG_ERRORS 131 132 Consider adjusting the PKG_CONFIG_PATH environment variable if you 133 installed software in a non-standard prefix. 134 135 _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. 144 145 _PKG_TEXT 146 147 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 156
