| 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 | # ---------------------------------- |
| 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 |