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 $3])dnl 63 fi]) 64 65 66 # _PKG_CONFIG([VARIABLE], [COMMAND], [MODULES]) 67 # --------------------------------------------- 68 m4_define([_PKG_CONFIG], 69 [if test -n "$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 77 else 78 pkg_failed=untried 79 fi[]dnl 80 ])# _PKG_CONFIG 81 82 # _PKG_SHORT_ERRORS_SUPPORTED 83 # ----------------------------- 84 AC_DEFUN([_PKG_SHORT_ERRORS_SUPPORTED], 85 [AC_REQUIRE([PKG_PROG_PKG_CONFIG]) 86 if $PKG_CONFIG --atleast-pkgconfig-version 0.20; then 87 _pkg_short_errors_supported=yes 88 else 89 _pkg_short_errors_supported=no 90 fi[]dnl 91 ])# _PKG_SHORT_ERRORS_SUPPORTED 92 93 94 # PKG_CHECK_MODULES(VARIABLE-PREFIX, MODULES, [ACTION-IF-FOUND], 95 # [ACTION-IF-NOT-FOUND]) 96 # 97 # 98 # Note that if there is a possibility the first call to 99 # PKG_CHECK_MODULES might not happen, you should be sure to include an 100 # explicit call to PKG_PROG_PKG_CONFIG in your configure.ac 101 # 102 # 103 # -------------------------------------------------------------- 104 AC_DEFUN([PKG_CHECK_MODULES], 105 [AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl 106 AC_ARG_VAR([$1][_CFLAGS], [C compiler flags for $1, overriding pkg-config])dnl 107 AC_ARG_VAR([$1][_LIBS], [linker flags for $1, overriding pkg-config])dnl 108 109 pkg_failed=no 110 AC_MSG_CHECKING([for $1]) 111 112 _PKG_CONFIG([$1][_CFLAGS], [cflags], [$2]) 113 _PKG_CONFIG([$1][_LIBS], [libs], [$2]) 114 115 m4_define([_PKG_TEXT], [Alternatively, you may set the environment variables $1[]_CFLAGS 116 and $1[]_LIBS to avoid the need to call pkg-config. 117 See the pkg-config man page for more details.]) 118 119 if test $pkg_failed = yes; then 120 _PKG_SHORT_ERRORS_SUPPORTED 121 if test $_pkg_short_errors_supported = yes; then 122 $1[]_PKG_ERRORS=`$PKG_CONFIG --short-errors --errors-to-stdout --print-errors "$2"` 123 else 124 $1[]_PKG_ERRORS=`$PKG_CONFIG --errors-to-stdout --print-errors "$2"` 125 fi 126 # Put the nasty error message in config.log where it belongs 127 echo "$$1[]_PKG_ERRORS" >&AS_MESSAGE_LOG_FD 128 129 ifelse([$4], , [AC_MSG_ERROR(dnl 130 [Package requirements ($2) were not met: 131 132 $$1_PKG_ERRORS 133 134 Consider adjusting the PKG_CONFIG_PATH environment variable if you 135 installed software in a non-standard prefix. 136 137 _PKG_TEXT 138 ])], 139 [AC_MSG_RESULT([no]) 140 $4]) 141 elif test $pkg_failed = untried; then 142 ifelse([$4], , [AC_MSG_FAILURE(dnl 143 [The pkg-config script could not be found or is too old. Make sure it 144 is in your PATH or set the PKG_CONFIG environment variable to the full 145 path to pkg-config. 146 147 _PKG_TEXT 148 149 To get pkg-config, see <http://pkg-config.freedesktop.org/>.])], 150 [$4]) 151 else 152 $1[]_CFLAGS=$pkg_cv_[]$1[]_CFLAGS 153 $1[]_LIBS=$pkg_cv_[]$1[]_LIBS 154 AC_MSG_RESULT([yes]) 155 ifelse([$3], , :, [$3]) 156 fi[]dnl 157 ])# PKG_CHECK_MODULES 158
