-dnl aclocal.m4 generated automatically by aclocal 1.4
+dnl aclocal.m4 generated automatically by aclocal 1.4-p6
-dnl Copyright (C) 1994, 1995-8, 1999 Free Software Foundation, Inc.
+dnl Copyright (C) 1994, 1995-8, 1999, 2001 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
AC_DEFUN([WX_PATH_FIND_INCLUDES],
[
ac_find_includes=
-for ac_dir in $1;
+for ac_dir in $1 /usr/include;
do
if test -f "$ac_dir/$2"; then
ac_find_includes=$ac_dir
AC_DEFUN([WX_PATH_FIND_LIBRARIES],
[
ac_find_libraries=
-for ac_dir in $1;
+for ac_dir in $1 /usr/lib;
do
for ac_extension in a so sl dylib; do
if test -f "$ac_dir/lib$2.$ac_extension"; then
dnl ---------------------------------------------------------------------------
AC_DEFUN([WX_INCLUDE_PATH_EXIST],
[
- ac_path_to_include=$1
- echo "$2" | grep "\-I$1" > /dev/null
- result=$?
- if test $result = 0; then
+ dnl never add -I/usr/include to the CPPFLAGS
+ if test "x$1" = "x/usr/include"; then
ac_path_to_include=""
else
- ac_path_to_include=" -I$1"
+ echo "$2" | grep "\-I$1" > /dev/null
+ result=$?
+ if test $result = 0; then
+ ac_path_to_include=""
+ else
+ ac_path_to_include=" -I$1"
+ fi
fi
])
fi
])
+dnl ---------------------------------------------------------------------------
+dnl WX_CPP_EXPLICIT checks whether the C++ compiler support the explicit
+dnl keyword and defines HAVE_EXPLICIT if this is the case
+dnl ---------------------------------------------------------------------------
+
+AC_DEFUN([WX_CPP_EXPLICIT],
+[
+ AC_CACHE_CHECK([if C++ compiler supports the explicit keyword],
+ wx_cv_explicit,
+ [
+ AC_LANG_SAVE
+ AC_LANG_CPLUSPLUS
+
+ dnl do the test in 2 steps: first check that the compiler knows about the
+ dnl explicit keyword at all and then verify that it really honours it
+ AC_TRY_COMPILE(
+ [
+ class Foo { public: explicit Foo(int) {} };
+ ],
+ [
+ return 0;
+ ],
+ [
+ AC_TRY_COMPILE(
+ [
+ class Foo { public: explicit Foo(int) {} };
+ static void TakeFoo(const Foo& foo) { }
+ ],
+ [
+ TakeFoo(17);
+ return 0;
+ ],
+ wx_cv_explicit=no,
+ wx_cv_explicit=yes
+ )
+ ],
+ wx_cv_explicit=no
+ )
+
+ AC_LANG_RESTORE
+ ])
+
+ if test "$wx_cv_explicit" = "yes"; then
+ AC_DEFINE(HAVE_EXPLICIT)
+ fi
+])
+
dnl ---------------------------------------------------------------------------
dnl a slightly better AC_C_BIGENDIAN macro which allows cross-compiling
dnl ---------------------------------------------------------------------------
])
dnl like WX_ARG_WITH but uses AC_ARG_ENABLE instead of AC_ARG_WITH
-dnl usage: WX_ARG_ENABLE(option, helpmessage, variable-name)
+dnl usage: WX_ARG_ENABLE(option, helpmessage, variable-name, enablestring)
+dnl
+dnl enablestring is a hack and allows to show "checking for --disable-foo"
+dnl message when running configure instead of the default "checking for
+dnl --enable-foo" one whih is useful for the options enabled by default
AC_DEFUN([WX_ARG_ENABLE],
[
- AC_MSG_CHECKING([for --enable-$1])
+ enablestring=$4
+ AC_MSG_CHECKING([for --${enablestring:-enable}-$1])
no_cache=0
AC_ARG_ENABLE($1, [$2],
[
])
+dnl ===========================================================================
+dnl Linker features test
+dnl ===========================================================================
+
+dnl ---------------------------------------------------------------------------
+dnl WX_VERSIONED_SYMBOLS checks whether the linker can create versioned
+dnl symbols. If it can, sets LDFLAGS_VERSIONING to $CXX flags needed to use
+dnl version script file named versionfile
+dnl
+dnl call WX_VERSIONED_SYMBOLS(versionfile)
+dnl ---------------------------------------------------------------------------
+AC_DEFUN([WX_VERSIONED_SYMBOLS],
+[
+ found_versioning=no
+
+ dnl FIXME - doesn't work, Solaris linker doesn't accept wildcards
+ dnl in the script.
+ dnl dnl Check for known non-gcc cases:
+ dnl case "${host}" in
+ dnl *-*-solaris2* )
+ dnl if test "x$GCC" != "xyes" ; then
+ dnl LDFLAGS_VERSIONING="-M $1"
+ dnl found_versioning=yes
+ dnl fi
+ dnl ;;
+ dnl esac
+
+ dnl Generic check for GCC or GCC-like behaviour (Intel C++, GCC):
+ if test $found_versioning = no ; then
+ AC_CACHE_CHECK([if the linker accepts --version-script], wx_cv_version_script,
+ [
+ echo "VER_1 { *; };" >conftest.sym
+ echo "int main() { return 0; }" >conftest.cpp
+
+ if AC_TRY_COMMAND([
+ $CXX -o conftest.output $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.cpp
+ -Wl,--version-script,conftest.sym >/dev/null 2>conftest.stderr]) ; then
+ if test -s conftest.stderr ; then
+ wx_cv_version_script=no
+ else
+ wx_cv_version_script=yes
+ fi
+ else
+ wx_cv_version_script=no
+ fi
+ rm -f conftest.output conftest.stderr conftest.sym conftest.cpp
+ ])
+ if test $wx_cv_version_script = yes ; then
+ LDFLAGS_VERSIONING="-Wl,--version-script,$1"
+ fi
+ fi
+])
+
dnl ===========================================================================
dnl "3rd party" macros included here because they are not widely available
dnl ===========================================================================
-
dnl ---------------------------------------------------------------------------
dnl test for availability of iconv()
dnl ---------------------------------------------------------------------------
)
iconv_const=
- if test "x$wx_cv_func_iconv_const" != "xyes"; then
+ if test "x$wx_cv_func_iconv_const" = "xyes"; then
iconv_const="const"
fi
AC_SUBST(LIBICONV)
])
-
dnl ---------------------------------------------------------------------------
-dnl test for GTK+ 2.0
+dnl AC_SYS_LARGEFILE (partly based on the code from autoconf 2.5x)
dnl ---------------------------------------------------------------------------
+dnl WX_SYS_LARGEFILE_TEST
+dnl
+dnl NB: original autoconf test was checking if compiler supported 6 bit off_t
+dnl arithmetic properly but this failed miserably with gcc under Linux
+dnl whereas the system still supports 64 bit files, so now simply check
+dnl that off_t is big enough
+define(WX_SYS_LARGEFILE_TEST,
+[typedef struct {
+ unsigned int field: sizeof(off_t) == 8;
+} wxlf;
+])
+
+
+dnl WX_SYS_LARGEFILE_MACRO_VALUE(C-MACRO, VALUE, CACHE-VAR)
+define(WX_SYS_LARGEFILE_MACRO_VALUE,
+[
+ AC_CACHE_CHECK([for $1 value needed for large files], [$3],
+ [
+ AC_TRY_COMPILE([#define $1 $2
+ #include <sys/types.h>],
+ WX_SYS_LARGEFILE_TEST,
+ [$3=$2],
+ [$3=no])
+ ]
+ )
+
+ if test "$$3" != no; then
+ wx_largefile=yes
+ AC_DEFINE_UNQUOTED([$1], [$$3])
+ fi
+])
+
+
+dnl AC_SYS_LARGEFILE
+dnl ----------------
+dnl By default, many hosts won't let programs access large files;
+dnl one must use special compiler options to get large-file access to work.
+dnl For more details about this brain damage please see:
+dnl http://www.sas.com/standards/large.file/x_open.20Mar96.html
+AC_DEFUN([AC_SYS_LARGEFILE],
+[AC_ARG_ENABLE(largefile,
+ [ --disable-largefile omit support for large files])
+if test "$enable_largefile" != no; then
+ dnl _FILE_OFFSET_BITS==64 is needed for Linux, Solaris, ...
+ dnl _LARGE_FILES -- for AIX
+ wx_largefile=no
+ WX_SYS_LARGEFILE_MACRO_VALUE(_FILE_OFFSET_BITS, 64, ac_cv_sys_file_offset_bits)
+ if test "x$wx_largefile" != "xyes"; then
+ WX_SYS_LARGEFILE_MACRO_VALUE(_LARGE_FILES, 1, ac_cv_sys_large_files)
+ fi
+
+ AC_MSG_CHECKING(if large file support is available)
+ if test "x$wx_largefile" = "xyes"; then
+ AC_DEFINE(HAVE_LARGEFILE_SUPPORT)
+ fi
+ AC_MSG_RESULT($wx_largefile)
+fi
+])
+
+
+dnl Available from the GNU Autoconf Macro Archive at:
+dnl http://www.gnu.org/software/ac-archive/htmldoc/ac_cxx_const_cast.html
+dnl
+AC_DEFUN([AC_CXX_CONST_CAST],
+[AC_CACHE_CHECK(whether the compiler supports const_cast<>,
+ac_cv_cxx_const_cast,
+[AC_LANG_SAVE
+ AC_LANG_CPLUSPLUS
+ AC_TRY_COMPILE(,[int x = 0;const int& y = x;int& z = const_cast<int&>(y);return z;],
+ ac_cv_cxx_const_cast=yes, ac_cv_cxx_const_cast=no)
+ AC_LANG_RESTORE
+])
+if test "$ac_cv_cxx_const_cast" = yes; then
+ AC_DEFINE(HAVE_CONST_CAST,,[define if the compiler supports const_cast<>])
+fi
+])
+
+# Configure paths for GTK+
+# Owen Taylor 1997-2001
+
dnl AM_PATH_GTK_2_0([MINIMUM-VERSION, [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND [, MODULES]]]])
-dnl Test for GTK, and define GTK_CFLAGS and GTK_LIBS
+dnl Test for GTK+, and define GTK_CFLAGS and GTK_LIBS, if gthread is specified in MODULES,
+dnl pass to pkg-config
dnl
AC_DEFUN(AM_PATH_GTK_2_0,
-[dnl
-dnl Get the cflags and libraries from the gtk-config-2.0 script
+[dnl
+dnl Get the cflags and libraries from pkg-config
dnl
-AC_ARG_WITH(gtk-prefix,[ --with-gtk-prefix=PFX Prefix where GTK is installed (optional)],
- gtk_config_prefix="$withval", gtk_config_prefix="")
-AC_ARG_WITH(gtk-exec-prefix,[ --with-gtk-exec-prefix=PFX Exec prefix where GTK is installed (optional)],
- gtk_config_exec_prefix="$withval", gtk_config_exec_prefix="")
-AC_ARG_ENABLE(gtktest, [ --disable-gtktest Do not try to compile and run a test GTK program],
- , enable_gtktest=yes)
+AC_ARG_ENABLE(gtktest, [ --disable-gtktest do not try to compile and run a test GTK+ program],
+ , enable_gtktest=yes)
+ pkg_config_args=gtk+-2.0
for module in . $4
do
case "$module" in
- gthread)
- gtk_config_args="$gtk_config_args gthread"
+ gthread)
+ pkg_config_args="$pkg_config_args gthread-2.0"
;;
esac
done
- if test x$gtk_config_exec_prefix != x ; then
- gtk_config_args="$gtk_config_args --exec-prefix=$gtk_config_exec_prefix"
- if test x${GTK_CONFIG_2_0+set} != xset ; then
- GTK_CONFIG_2_0=$gtk_config_exec_prefix/bin/gtk-config-2.0
- fi
+ no_gtk=""
+
+ AC_PATH_PROG(PKG_CONFIG, pkg-config, no)
+
+ if test x$PKG_CONFIG != xno ; then
+ if pkg-config --atleast-pkgconfig-version 0.7 ; then
+ :
+ else
+ echo *** pkg-config too old; version 0.7 or better required.
+ no_gtk=yes
+ PKG_CONFIG=no
+ fi
+ else
+ no_gtk=yes
fi
- if test x$gtk_config_prefix != x ; then
- gtk_config_args="$gtk_config_args --prefix=$gtk_config_prefix"
- if test x${GTK_CONFIG_2_0+set} != xset ; then
- GTK_CONFIG_2_0=$gtk_config_prefix/bin/gtk-config-2.0
- fi
+
+ min_gtk_version=ifelse([$1], ,2.0.0,$1)
+ AC_MSG_CHECKING(for GTK+ - version >= $min_gtk_version)
+
+ if test x$PKG_CONFIG != xno ; then
+ ## don't try to run the test against uninstalled libtool libs
+ if $PKG_CONFIG --uninstalled $pkg_config_args; then
+ echo "Will use uninstalled version of GTK+ found in PKG_CONFIG_PATH"
+ enable_gtktest=no
+ fi
+
+ if $PKG_CONFIG --atleast-version $min_gtk_version $pkg_config_args; then
+ :
+ else
+ no_gtk=yes
+ fi
fi
- AC_PATH_PROG(GTK_CONFIG_2_0, gtk-config-2.0, no)
- min_gtk_version=ifelse([$1], ,1.3.1,$1)
- AC_MSG_CHECKING(for GTK - version >= $min_gtk_version)
- no_gtk=""
- if test "$GTK_CONFIG_2_0" = "no" ; then
- no_gtk=yes
- else
- GTK_CFLAGS=`$GTK_CONFIG_2_0 $gtk_config_args --cflags`
- GTK_LIBS=`$GTK_CONFIG_2_0 $gtk_config_args --libs`
- gtk_config_major_version=`$GTK_CONFIG_2_0 $gtk_config_args --version | \
+ if test x"$no_gtk" = x ; then
+ GTK_CFLAGS=`$PKG_CONFIG $pkg_config_args --cflags`
+ GTK_LIBS=`$PKG_CONFIG $pkg_config_args --libs`
+ gtk_config_major_version=`$PKG_CONFIG --modversion gtk+-2.0 | \
sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'`
- gtk_config_minor_version=`$GTK_CONFIG_2_0 $gtk_config_args --version | \
+ gtk_config_minor_version=`$PKG_CONFIG --modversion gtk+-2.0 | \
sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\2/'`
- gtk_config_micro_version=`$GTK_CONFIG_2_0 $gtk_config_args --version | \
+ gtk_config_micro_version=`$PKG_CONFIG --modversion gtk+-2.0 | \
sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\3/'`
if test "x$enable_gtktest" = "xyes" ; then
ac_save_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS $GTK_CFLAGS"
LIBS="$GTK_LIBS $LIBS"
dnl
-dnl Now check if the installed GTK is sufficiently new. (Also sanity
-dnl checks the results of gtk-config-2.0 to some extent
+dnl Now check if the installed GTK+ is sufficiently new. (Also sanity
+dnl checks the results of pkg-config to some extent)
dnl
rm -f conf.gtktest
AC_TRY_RUN([
#include <stdio.h>
#include <stdlib.h>
-int
+int
main ()
{
int major, minor, micro;
(gtk_minor_version != $gtk_config_minor_version) ||
(gtk_micro_version != $gtk_config_micro_version))
{
- printf("\n*** 'gtk-config-2.0 --version' returned %d.%d.%d, but GTK+ (%d.%d.%d)\n",
+ printf("\n*** 'pkg-config --modversion gtk+-2.0' returned %d.%d.%d, but GTK+ (%d.%d.%d)\n",
$gtk_config_major_version, $gtk_config_minor_version, $gtk_config_micro_version,
gtk_major_version, gtk_minor_version, gtk_micro_version);
- printf ("*** was found! If gtk-config-2.0 was correct, then it is best\n");
+ printf ("*** was found! If pkg-config was correct, then it is best\n");
printf ("*** to remove the old version of GTK+. You may also be able to fix the error\n");
printf("*** by modifying your LD_LIBRARY_PATH enviroment variable, or by editing\n");
printf("*** /etc/ld.so.conf. Make sure you have run ldconfig if that is\n");
printf("*** required on your system.\n");
- printf("*** If gtk-config-2.0 was wrong, set the environment variable GTK_CONFIG_2_0\n");
- printf("*** to point to the correct copy of gtk-config-2.0, and remove the file config.cache\n");
- printf("*** before re-running configure\n");
- }
-#if defined (GTK_MAJOR_VERSION) && defined (GTK_MINOR_VERSION) && defined (GTK_MICRO_VERSION)
+ printf("*** If pkg-config was wrong, set the environment variable PKG_CONFIG_PATH\n");
+ printf("*** to point to the correct configuration files\n");
+ }
else if ((gtk_major_version != GTK_MAJOR_VERSION) ||
- (gtk_minor_version != GTK_MINOR_VERSION) ||
+ (gtk_minor_version != GTK_MINOR_VERSION) ||
(gtk_micro_version != GTK_MICRO_VERSION))
{
printf("*** GTK+ header files (version %d.%d.%d) do not match\n",
- GTK_MAJOR_VERSION, GTK_MINOR_VERSION, GTK_MICRO_VERSION);
+ GTK_MAJOR_VERSION, GTK_MINOR_VERSION, GTK_MICRO_VERSION);
printf("*** library (version %d.%d.%d)\n",
- gtk_major_version, gtk_minor_version, gtk_micro_version);
+ gtk_major_version, gtk_minor_version, gtk_micro_version);
}
-#endif /* defined (GTK_MAJOR_VERSION) ... */
else
{
if ((gtk_major_version > major) ||
printf("\n*** An old version of GTK+ (%d.%d.%d) was found.\n",
gtk_major_version, gtk_minor_version, gtk_micro_version);
printf("*** You need a version of GTK+ newer than %d.%d.%d. The latest version of\n",
- major, minor, micro);
+ major, minor, micro);
printf("*** GTK+ is always available from ftp://ftp.gtk.org.\n");
printf("***\n");
printf("*** If you have already installed a sufficiently new version, this error\n");
- printf("*** probably means that the wrong copy of the gtk-config-2.0 shell script is\n");
+ printf("*** probably means that the wrong copy of the pkg-config shell script is\n");
printf("*** being found. The easiest way to fix this is to remove the old version\n");
- printf("*** of GTK+, but you can also set the GTK_CONFIG_2_0 environment to point to the\n");
- printf("*** correct copy of gtk-config-2.0. (In this case, you will have to\n");
+ printf("*** of GTK+, but you can also set the PKG_CONFIG environment to point to the\n");
+ printf("*** correct copy of pkg-config. (In this case, you will have to\n");
printf("*** modify your LD_LIBRARY_PATH enviroment variable, or edit /etc/ld.so.conf\n");
printf("*** so that the correct libraries are found at run-time))\n");
}
fi
if test "x$no_gtk" = x ; then
AC_MSG_RESULT(yes (version $gtk_config_major_version.$gtk_config_minor_version.$gtk_config_micro_version))
- ifelse([$2], , :, [$2])
+ ifelse([$2], , :, [$2])
else
AC_MSG_RESULT(no)
- if test "$GTK_CONFIG_2_0" = "no" ; then
- echo "*** The gtk-config-2.0 script installed by GTK could not be found"
- echo "*** If GTK was installed in PREFIX, make sure PREFIX/bin is in"
- echo "*** your path, or set the GTK_CONFIG_2_0 environment variable to the"
- echo "*** full path to gtk-config-2.0."
+ if test "$PKG_CONFIG" = "no" ; then
+ echo "*** A new enough version of pkg-config was not found."
+ echo "*** See http://pkgconfig.sourceforge.net"
else
if test -f conf.gtktest ; then
:
else
- echo "*** Could not run GTK test program, checking why..."
+ echo "*** Could not run GTK+ test program, checking why..."
+ ac_save_CFLAGS="$CFLAGS"
+ ac_save_LIBS="$LIBS"
CFLAGS="$CFLAGS $GTK_CFLAGS"
LIBS="$LIBS $GTK_LIBS"
AC_TRY_LINK([
#include <stdio.h>
], [ return ((gtk_major_version) || (gtk_minor_version) || (gtk_micro_version)); ],
[ echo "*** The test program compiled, but did not run. This usually means"
- echo "*** that the run-time linker is not finding GTK or finding the wrong"
- echo "*** version of GTK. If it is not finding GTK, you'll need to set your"
+ echo "*** that the run-time linker is not finding GTK+ or finding the wrong"
+ echo "*** version of GTK+. If it is not finding GTK+, you'll need to set your"
echo "*** LD_LIBRARY_PATH environment variable, or edit /etc/ld.so.conf to point"
echo "*** to the installed location Also, make sure you have run ldconfig if that"
echo "*** is required on your system"
- echo "***"
+ echo "***"
echo "*** If you have an old version installed, it is best to remove it, although"
- echo "*** you may also be able to get things to work by modifying LD_LIBRARY_PATH"
- echo "***"
- echo "*** If you have a RedHat 5.0 system, you should remove the GTK package that"
- echo "*** came with the system with the command"
- echo "***"
- echo "*** rpm --erase --nodeps gtk gtk-devel" ],
+ echo "*** you may also be able to get things to work by modifying LD_LIBRARY_PATH" ],
[ echo "*** The test program failed to compile or link. See the file config.log for the"
- echo "*** exact error that occured. This usually means GTK was incorrectly installed"
- echo "*** or that you have moved GTK since it was installed. In the latter case, you"
- echo "*** may want to edit the gtk-config-2.0 script: $GTK_CONFIG_2_0" ])
+ echo "*** exact error that occured. This usually means GTK+ is incorrectly installed."])
CFLAGS="$ac_save_CFLAGS"
LIBS="$ac_save_LIBS"
fi
rm -f conf.gtktest
])
+
+dnl PKG_CHECK_MODULES(GSTUFF, gtk+-2.0 >= 1.3 glib = 1.3.4, action-if, action-not)
+dnl defines GSTUFF_LIBS, GSTUFF_CFLAGS, see pkg-config man page
+dnl also defines GSTUFF_PKG_ERRORS on error
+AC_DEFUN(PKG_CHECK_MODULES, [
+ succeeded=no
+
+ if test -z "$PKG_CONFIG"; then
+ AC_PATH_PROG(PKG_CONFIG, pkg-config, no)
+ fi
+
+ if test "$PKG_CONFIG" = "no" ; then
+ echo "*** The pkg-config script could not be found. Make sure it is"
+ echo "*** in your path, or set the PKG_CONFIG environment variable"
+ echo "*** to the full path to pkg-config."
+ echo "*** Or see http://www.freedesktop.org/software/pkgconfig to get pkg-config."
+ else
+ PKG_CONFIG_MIN_VERSION=0.9.0
+ if $PKG_CONFIG --atleast-pkgconfig-version $PKG_CONFIG_MIN_VERSION; then
+ AC_MSG_CHECKING(for $2)
+
+ if $PKG_CONFIG --exists "$2" ; then
+ AC_MSG_RESULT(yes)
+ succeeded=yes
+
+ AC_MSG_CHECKING($1_CFLAGS)
+ $1_CFLAGS=`$PKG_CONFIG --cflags "$2"`
+ AC_MSG_RESULT($$1_CFLAGS)
+
+ AC_MSG_CHECKING($1_LIBS)
+ $1_LIBS=`$PKG_CONFIG --libs "$2"`
+ AC_MSG_RESULT($$1_LIBS)
+ else
+ $1_CFLAGS=""
+ $1_LIBS=""
+ ## If we have a custom action on failure, don't print errors, but
+ ## do set a variable so people can do so.
+ $1_PKG_ERRORS=`$PKG_CONFIG --errors-to-stdout --print-errors "$2"`
+ ifelse([$4], ,echo $$1_PKG_ERRORS,)
+ fi
+
+ AC_SUBST($1_CFLAGS)
+ AC_SUBST($1_LIBS)
+ else
+ echo "*** Your version of pkg-config is too old. You need version $PKG_CONFIG_MIN_VERSION or newer."
+ echo "*** See http://www.freedesktop.org/software/pkgconfig"
+ fi
+ fi
+
+ if test $succeeded = yes; then
+ ifelse([$3], , :, [$3])
+ else
+ ifelse([$4], , AC_MSG_ERROR([Library requirements ($2) not met; consider adjusting the PKG_CONFIG_PATH environment variable if your libraries are in a nonstandard prefix so pkg-config can find them.]), [$4])
+ fi
+])
+
+
+