add glib-2.0.m4 from glib 2.4.7 to the m4 directory; this is needed to

detect glib 2.x on systems that may not have it installed


git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@2001 35c25a1d-7b9e-4130-9fde-d3aeb78583b8

ChangeLog

@@ -273,6 +273,10 @@ CVS code -
 - README.CVS:
 	- Mention the requirement for glib 2.x on systems lacking
 	  v?snprintf(), and add minor formatting changes.
+- m4/glib-2.0.m4:
+	- New file imported from glib 2.4.7.  This is needed to detect
+	  glib 2.x on systems that may not have it installed. (DLR,
+	  suggested by Jordi)
 
 GNU nano 1.3.4 - 2004.08.17
 - General:

m4/glib-2.0.m4

+# Configure paths for GLIB
+# Owen Taylor     1997-2001
+
+dnl AM_PATH_GLIB_2_0([MINIMUM-VERSION, [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND [, MODULES]]]])
+dnl Test for GLIB, and define GLIB_CFLAGS and GLIB_LIBS, if gmodule, gobject or 
+dnl gthread is specified in MODULES, pass to pkg-config
+dnl
+AC_DEFUN([AM_PATH_GLIB_2_0],
+[dnl 
+dnl Get the cflags and libraries from pkg-config
+dnl
+AC_ARG_ENABLE(glibtest, [  --disable-glibtest      do not try to compile and run a test GLIB program],
+		    , enable_glibtest=yes)
+
+  pkg_config_args=glib-2.0
+  for module in . $4
+  do
+      case "$module" in
+         gmodule) 
+             pkg_config_args="$pkg_config_args gmodule-2.0"
+         ;;
+         gobject) 
+             pkg_config_args="$pkg_config_args gobject-2.0"
+         ;;
+         gthread) 
+             pkg_config_args="$pkg_config_args gthread-2.0"
+         ;;
+      esac
+  done
+
+  AC_PATH_PROG(PKG_CONFIG, pkg-config, no)
+
+  no_glib=""
+
+  if test x$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_glib=yes
+      PKG_CONFIG=no
+    fi
+  else
+    no_glib=yes
+  fi
+
+  min_glib_version=ifelse([$1], ,2.0.0,$1)
+  AC_MSG_CHECKING(for GLIB - version >= $min_glib_version)
+
+  if test x$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 GLib found in PKG_CONFIG_PATH"
+	  enable_glibtest=no
+    fi
+
+    if $PKG_CONFIG --atleast-version $min_glib_version $pkg_config_args; then
+	  :
+    else
+	  no_glib=yes
+    fi
+  fi
+
+  if test x"$no_glib" = x ; then
+    GLIB_GENMARSHAL=`$PKG_CONFIG --variable=glib_genmarshal glib-2.0`
+    GOBJECT_QUERY=`$PKG_CONFIG --variable=gobject_query glib-2.0`
+    GLIB_MKENUMS=`$PKG_CONFIG --variable=glib_mkenums glib-2.0`
+
+    GLIB_CFLAGS=`$PKG_CONFIG --cflags $pkg_config_args`
+    GLIB_LIBS=`$PKG_CONFIG --libs $pkg_config_args`
+    glib_config_major_version=`$PKG_CONFIG --modversion glib-2.0 | \
+           sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'`
+    glib_config_minor_version=`$PKG_CONFIG --modversion glib-2.0 | \
+           sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\2/'`
+    glib_config_micro_version=`$PKG_CONFIG --modversion glib-2.0 | \
+           sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\3/'`
+    if test "x$enable_glibtest" = "xyes" ; then
+      ac_save_CFLAGS="$CFLAGS"
+      ac_save_LIBS="$LIBS"
+      CFLAGS="$CFLAGS $GLIB_CFLAGS"
+      LIBS="$GLIB_LIBS $LIBS"
+dnl
+dnl Now check if the installed GLIB is sufficiently new. (Also sanity
+dnl checks the results of pkg-config to some extent)
+dnl
+      rm -f conf.glibtest
+      AC_TRY_RUN([
+#include <glib.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+int 
+main ()
+{
+  int major, minor, micro;
+  char *tmp_version;
+
+  system ("touch conf.glibtest");
+
+  /* HP/UX 9 (%@#!) writes to sscanf strings */
+  tmp_version = g_strdup("$min_glib_version");
+  if (sscanf(tmp_version, "%d.%d.%d", &major, &minor, &micro) != 3) {
+     printf("%s, bad version string\n", "$min_glib_version");
+     exit(1);
+   }
+
+  if ((glib_major_version != $glib_config_major_version) ||
+      (glib_minor_version != $glib_config_minor_version) ||
+      (glib_micro_version != $glib_config_micro_version))
+    {
+      printf("\n*** 'pkg-config --modversion glib-2.0' returned %d.%d.%d, but GLIB (%d.%d.%d)\n", 
+             $glib_config_major_version, $glib_config_minor_version, $glib_config_micro_version,
+             glib_major_version, glib_minor_version, glib_micro_version);
+      printf ("*** was found! If pkg-config was correct, then it is best\n");
+      printf ("*** to remove the old version of GLib. 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 pkg-config was wrong, set the environment variable PKG_CONFIG_PATH\n");
+      printf("*** to point to the correct configuration files\n");
+    } 
+  else if ((glib_major_version != GLIB_MAJOR_VERSION) ||
+	   (glib_minor_version != GLIB_MINOR_VERSION) ||
+           (glib_micro_version != GLIB_MICRO_VERSION))
+    {
+      printf("*** GLIB header files (version %d.%d.%d) do not match\n",
+	     GLIB_MAJOR_VERSION, GLIB_MINOR_VERSION, GLIB_MICRO_VERSION);
+      printf("*** library (version %d.%d.%d)\n",
+	     glib_major_version, glib_minor_version, glib_micro_version);
+    }
+  else
+    {
+      if ((glib_major_version > major) ||
+        ((glib_major_version == major) && (glib_minor_version > minor)) ||
+        ((glib_major_version == major) && (glib_minor_version == minor) && (glib_micro_version >= micro)))
+      {
+        return 0;
+       }
+     else
+      {
+        printf("\n*** An old version of GLIB (%d.%d.%d) was found.\n",
+               glib_major_version, glib_minor_version, glib_micro_version);
+        printf("*** You need a version of GLIB newer than %d.%d.%d. The latest version of\n",
+	       major, minor, micro);
+        printf("*** GLIB 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 pkg-config shell script is\n");
+        printf("*** being found. The easiest way to fix this is to remove the old version\n");
+        printf("*** of GLIB, 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");
+      }
+    }
+  return 1;
+}
+],, no_glib=yes,[echo $ac_n "cross compiling; assumed OK... $ac_c"])
+       CFLAGS="$ac_save_CFLAGS"
+       LIBS="$ac_save_LIBS"
+     fi
+  fi
+  if test "x$no_glib" = x ; then
+     AC_MSG_RESULT(yes (version $glib_config_major_version.$glib_config_minor_version.$glib_config_micro_version))
+     ifelse([$2], , :, [$2])     
+  else
+     AC_MSG_RESULT(no)
+     if test "$PKG_CONFIG" = "no" ; then
+       echo "*** A new enough version of pkg-config was not found."
+       echo "*** See http://www.freedesktop.org/software/pkgconfig/"
+     else
+       if test -f conf.glibtest ; then
+        :
+       else
+          echo "*** Could not run GLIB test program, checking why..."
+          ac_save_CFLAGS="$CFLAGS"
+          ac_save_LIBS="$LIBS"
+          CFLAGS="$CFLAGS $GLIB_CFLAGS"
+          LIBS="$LIBS $GLIB_LIBS"
+          AC_TRY_LINK([
+#include <glib.h>
+#include <stdio.h>
+],      [ return ((glib_major_version) || (glib_minor_version) || (glib_micro_version)); ],
+        [ echo "*** The test program compiled, but did not run. This usually means"
+          echo "*** that the run-time linker is not finding GLIB or finding the wrong"
+          echo "*** version of GLIB. If it is not finding GLIB, you'll need to set your"
+          echo "*** LD_LIBRARY_PATH environment variable, or edit /etc/ld.so.conf to point"
+          echo "*** to the installed location  Also, make sure you have run ldconfig if that"
+          echo "*** is required on your system"
+	  echo "***"
+          echo "*** If you have an old version installed, it is best to remove it, although"
+          echo "*** you may also be able to get things to work by modifying LD_LIBRARY_PATH" ],
+        [ echo "*** The test program failed to compile or link. See the file config.log for the"
+          echo "*** exact error that occured. This usually means GLIB is incorrectly installed."])
+          CFLAGS="$ac_save_CFLAGS"
+          LIBS="$ac_save_LIBS"
+       fi
+     fi
+     GLIB_CFLAGS=""
+     GLIB_LIBS=""
+     GLIB_GENMARSHAL=""
+     GOBJECT_QUERY=""
+     GLIB_MKENUMS=""
+     ifelse([$3], , :, [$3])
+  fi
+  AC_SUBST(GLIB_CFLAGS)
+  AC_SUBST(GLIB_LIBS)
+  AC_SUBST(GLIB_GENMARSHAL)
+  AC_SUBST(GOBJECT_QUERY)
+  AC_SUBST(GLIB_MKENUMS)
+  rm -f conf.glibtest
+])