If we need pkg-config, then we also want this one: "Macros to locate and utilise pkg-config"
ACK. -- Samuli Seppänen Community Manager OpenVPN Technologies, Inc irc freenode net: mattock > RHEL and others do not install this globally, so we provide our own copy. > > Signed-off-by: Alon Bar-Lev <alon.bar...@gmail.com> > --- > m4/pkg.m4 | 159 > +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ > 1 files changed, 159 insertions(+), 0 deletions(-) > create mode 100644 m4/pkg.m4 > > diff --git a/m4/pkg.m4 b/m4/pkg.m4 > new file mode 100644 > index 0000000..9a71878 > --- /dev/null > +++ b/m4/pkg.m4 > @@ -0,0 +1,159 @@ > +# pkg.m4 - Macros to locate and utilise pkg-config. -*- Autoconf > -*- > +# serial 1 (pkg-config-0.24) > +# > +# Copyright © 2004 Scott James Remnant <sc...@netsplit.com>. > +# > +# This program is free software; you can redistribute it and/or modify > +# it under the terms of the GNU General Public License as published by > +# the Free Software Foundation; either version 2 of the License, or > +# (at your option) any later version. > +# > +# This program is distributed in the hope that it will be useful, but > +# WITHOUT ANY WARRANTY; without even the implied warranty of > +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU > +# General Public License for more details. > +# > +# You should have received a copy of the GNU General Public License > +# along with this program; if not, write to the Free Software > +# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. > +# > +# As a special exception to the GNU General Public License, if you > +# distribute this file as part of a program that contains a > +# configuration script generated by Autoconf, you may include it under > +# the same distribution terms that you use for the rest of that program. > + > +# PKG_PROG_PKG_CONFIG([MIN-VERSION]) > +# ---------------------------------- > +AC_DEFUN([PKG_PROG_PKG_CONFIG], > +[m4_pattern_forbid([^_?PKG_[A-Z_]+$]) > +m4_pattern_allow([^PKG_CONFIG(_(PATH|LIBDIR|SYSROOT_DIR|ALLOW_SYSTEM_(CFLAGS|LIBS)))?$]) > +m4_pattern_allow([^PKG_CONFIG_(DISABLE_UNINSTALLED|TOP_BUILD_DIR|DEBUG_SPEW)$]) > +AC_ARG_VAR([PKG_CONFIG], [path to pkg-config utility]) > +AC_ARG_VAR([PKG_CONFIG_PATH], [directories to add to pkg-config's search > path]) > +AC_ARG_VAR([PKG_CONFIG_LIBDIR], [path overriding pkg-config's built-in > search path]) > + > +if test "x$ac_cv_env_PKG_CONFIG_set" != "xset"; then > + AC_PATH_TOOL([PKG_CONFIG], [pkg-config]) > +fi > +if test -n "$PKG_CONFIG"; then > + _pkg_min_version=m4_default([$1], [0.9.0]) > + AC_MSG_CHECKING([pkg-config is at least version $_pkg_min_version]) > + if $PKG_CONFIG --atleast-pkgconfig-version $_pkg_min_version; then > + AC_MSG_RESULT([yes]) > + else > + AC_MSG_RESULT([no]) > + PKG_CONFIG="" > + fi > +fi[]dnl > +])# PKG_PROG_PKG_CONFIG > + > +# PKG_CHECK_EXISTS(MODULES, [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND]) > +# > +# Check to see whether a particular set of modules exists. Similar > +# to PKG_CHECK_MODULES(), but does not set variables or print errors. > +# > +# Please remember that m4 expands AC_REQUIRE([PKG_PROG_PKG_CONFIG]) > +# only at the first occurence in configure.ac, so if the first place > +# it's called might be skipped (such as if it is within an "if", you > +# have to call PKG_CHECK_EXISTS manually > +# -------------------------------------------------------------- > +AC_DEFUN([PKG_CHECK_EXISTS], > +[AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl > +if test -n "$PKG_CONFIG" && \ > + AC_RUN_LOG([$PKG_CONFIG --exists --print-errors "$1"]); then > + m4_default([$2], [:]) > +m4_ifvaln([$3], [else > + $3])dnl > +fi]) > + > +# _PKG_CONFIG([VARIABLE], [COMMAND], [MODULES]) > +# --------------------------------------------- > +m4_define([_PKG_CONFIG], > +[if test -n "$$1"; then > + pkg_cv_[]$1="$$1" > + elif test -n "$PKG_CONFIG"; then > + PKG_CHECK_EXISTS([$3], > + [pkg_cv_[]$1=`$PKG_CONFIG --[]$2 "$3" 2>/dev/null` > + test "x$?" != "x0" && pkg_failed=yes ], > + [pkg_failed=yes]) > + else > + pkg_failed=untried > +fi[]dnl > +])# _PKG_CONFIG > + > +# _PKG_SHORT_ERRORS_SUPPORTED > +# ----------------------------- > +AC_DEFUN([_PKG_SHORT_ERRORS_SUPPORTED], > +[AC_REQUIRE([PKG_PROG_PKG_CONFIG]) > +if $PKG_CONFIG --atleast-pkgconfig-version 0.20; then > + _pkg_short_errors_supported=yes > +else > + _pkg_short_errors_supported=no > +fi[]dnl > +])# _PKG_SHORT_ERRORS_SUPPORTED > + > + > +# PKG_CHECK_MODULES(VARIABLE-PREFIX, MODULES, [ACTION-IF-FOUND], > +# [ACTION-IF-NOT-FOUND]) > +# > +# > +# Note that if there is a possibility the first call to > +# PKG_CHECK_MODULES might not happen, you should be sure to include an > +# explicit call to PKG_PROG_PKG_CONFIG in your configure.ac > +# > +# > +# -------------------------------------------------------------- > +AC_DEFUN([PKG_CHECK_MODULES], > +[AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl > +AC_ARG_VAR([$1][_CFLAGS], [C compiler flags for $1, overriding > pkg-config])dnl > +AC_ARG_VAR([$1][_LIBS], [linker flags for $1, overriding pkg-config])dnl > + > +pkg_failed=no > +AC_MSG_CHECKING([for $1]) > + > +_PKG_CONFIG([$1][_CFLAGS], [cflags], [$2]) > +_PKG_CONFIG([$1][_LIBS], [libs], [$2]) > + > +m4_define([_PKG_TEXT], [Alternatively, you may set the environment variables > $1[]_CFLAGS > +and $1[]_LIBS to avoid the need to call pkg-config. > +See the pkg-config man page for more details.]) > + > +if test $pkg_failed = yes; then > + AC_MSG_RESULT([no]) > + _PKG_SHORT_ERRORS_SUPPORTED > + if test $_pkg_short_errors_supported = yes; then > + $1[]_PKG_ERRORS=`$PKG_CONFIG --short-errors --print-errors > --cflags --libs "$2" 2>&1` > + else > + $1[]_PKG_ERRORS=`$PKG_CONFIG --print-errors --cflags --libs > "$2" 2>&1` > + fi > + # Put the nasty error message in config.log where it belongs > + echo "$$1[]_PKG_ERRORS" >&AS_MESSAGE_LOG_FD > + > + m4_default([$4], [AC_MSG_ERROR( > +[Package requirements ($2) were not met: > + > +$$1_PKG_ERRORS > + > +Consider adjusting the PKG_CONFIG_PATH environment variable if you > +installed software in a non-standard prefix. > + > +_PKG_TEXT])[]dnl > + ]) > +elif test $pkg_failed = untried; then > + AC_MSG_RESULT([no]) > + m4_default([$4], [AC_MSG_FAILURE( > +[The pkg-config script could not be found or is too old. Make sure it > +is in your PATH or set the PKG_CONFIG environment variable to the full > +path to pkg-config. > + > +_PKG_TEXT > + > +To get pkg-config, see <http://pkg-config.freedesktop.org/>.])[]dnl > + ]) > +else > + $1[]_CFLAGS=$pkg_cv_[]$1[]_CFLAGS > + $1[]_LIBS=$pkg_cv_[]$1[]_LIBS > + AC_MSG_RESULT([yes]) > + $3 > +fi[]dnl > +])# PKG_CHECK_MODULES
