Commit 3caf294637f4460abfe0c711a79e43a0d06d0d65
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199c9d6f
add in case that this macro does not exist on the system
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m4/pkg.m4
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| 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, write to the Free Software | |
| 18 | +# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
| 19 | +# | |
| 20 | +# As a special exception to the GNU General Public License, if you | |
| 21 | +# distribute this file as part of a program that contains a | |
| 22 | +# configuration script generated by Autoconf, you may include it under | |
| 23 | +# the same distribution terms that you use for the rest of that program. | |
| 24 | + | |
| 25 | +# PKG_PROG_PKG_CONFIG([MIN-VERSION]) | |
| 26 | +# ---------------------------------- | |
| 27 | +AC_DEFUN([PKG_PROG_PKG_CONFIG], | |
| 28 | +[m4_pattern_forbid([^_?PKG_[A-Z_]+$]) | |
| 29 | +m4_pattern_allow([^PKG_CONFIG(_PATH)?$]) | |
| 30 | +AC_ARG_VAR([PKG_CONFIG], [path to pkg-config utility]) | |
| 31 | +AC_ARG_VAR([PKG_CONFIG_PATH], [directories to add to pkg-config's search path]) | |
| 32 | +AC_ARG_VAR([PKG_CONFIG_LIBDIR], [path overriding pkg-config's built-in search path]) | |
| 33 | + | |
| 34 | +if test "x$ac_cv_env_PKG_CONFIG_set" != "xset"; then | |
| 35 | + AC_PATH_TOOL([PKG_CONFIG], [pkg-config]) | |
| 36 | +fi | |
| 37 | +if test -n "$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 $_pkg_min_version; then | |
| 41 | + AC_MSG_RESULT([yes]) | |
| 42 | + else | |
| 43 | + AC_MSG_RESULT([no]) | |
| 44 | + PKG_CONFIG="" | |
| 45 | + fi | |
| 46 | +fi[]dnl | |
| 47 | +])# PKG_PROG_PKG_CONFIG | |
| 48 | + | |
| 49 | +# PKG_CHECK_EXISTS(MODULES, [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND]) | |
| 50 | +# | |
| 51 | +# Check to see whether a particular set of modules exists. Similar | |
| 52 | +# to PKG_CHECK_MODULES(), but does not set variables or print errors. | |
| 53 | +# | |
| 54 | +# Please remember that m4 expands AC_REQUIRE([PKG_PROG_PKG_CONFIG]) | |
| 55 | +# only at the first occurence in configure.ac, so if the first place | |
| 56 | +# it's called might be skipped (such as if it is within an "if", you | |
| 57 | +# have to call PKG_CHECK_EXISTS manually | |
| 58 | +# -------------------------------------------------------------- | |
| 59 | +AC_DEFUN([PKG_CHECK_EXISTS], | |
| 60 | +[AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl | |
| 61 | +if test -n "$PKG_CONFIG" && \ | |
| 62 | + AC_RUN_LOG([$PKG_CONFIG --exists --print-errors "$1"]); then | |
| 63 | + m4_default([$2], [:]) | |
| 64 | +m4_ifvaln([$3], [else | |
| 65 | + $3])dnl | |
| 66 | +fi]) | |
| 67 | + | |
| 68 | +# _PKG_CONFIG([VARIABLE], [COMMAND], [MODULES]) | |
| 69 | +# --------------------------------------------- | |
| 70 | +m4_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 | + [pkg_failed=yes]) | |
| 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 | + AC_MSG_RESULT([no]) | |
| 121 | + _PKG_SHORT_ERRORS_SUPPORTED | |
| 122 | + if test $_pkg_short_errors_supported = yes; then | |
| 123 | + $1[]_PKG_ERRORS=`$PKG_CONFIG --short-errors --print-errors "$2" 2>&1` | |
| 124 | + else | |
| 125 | + $1[]_PKG_ERRORS=`$PKG_CONFIG --print-errors "$2" 2>&1` | |
| 126 | + fi | |
| 127 | + # Put the nasty error message in config.log where it belongs | |
| 128 | + echo "$$1[]_PKG_ERRORS" >&AS_MESSAGE_LOG_FD | |
| 129 | + | |
| 130 | + m4_default([$4], [AC_MSG_ERROR( | |
| 131 | +[Package requirements ($2) were not met: | |
| 132 | + | |
| 133 | +$$1_PKG_ERRORS | |
| 134 | + | |
| 135 | +Consider adjusting the PKG_CONFIG_PATH environment variable if you | |
| 136 | +installed software in a non-standard prefix. | |
| 137 | + | |
| 138 | +_PKG_TEXT])[]dnl | |
| 139 | + ]) | |
| 140 | +elif test $pkg_failed = untried; then | |
| 141 | + AC_MSG_RESULT([no]) | |
| 142 | + m4_default([$4], [AC_MSG_FAILURE( | |
| 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/>.])dnl | |
| 150 | + ]) | |
| 151 | +else | |
| 152 | + $1[]_CFLAGS=$pkg_cv_[]$1[]_CFLAGS | |
| 153 | + $1[]_LIBS=$pkg_cv_[]$1[]_LIBS | |
| 154 | + AC_MSG_RESULT([yes]) | |
| 155 | + $3 | |
| 156 | +fi[]dnl | |
| 157 | +])# PKG_CHECK_MODULES | ... | ... |