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# Configure paths for LIBMONA
# Marc Tittgemeyer 04-09-03
#       adapted from
# Configure paths for GLIB
# Owen Taylor       97-11-3

dnl AM_PATH_LIBMONA([MINIMUM-VERSION, [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND ]]])
dnl Test for LIBMONA, and define LIBMONA_CXXFLAGS and LIBMONA_LIBS
dnl
AC_DEFUN(AM_PATH_LIBMONA,
[dnl 
dnl Get the cflags and libraries from the libmona-config script
dnl
AC_ARG_WITH([libmona-prefix],
	    AC_HELP_STRING([--with-libmona-prefix=PFX],
		           [Prefix where libmona is installed (optional)]),
            		   [libmona_config_prefix="$withval"], [libmona_config_prefix=""])
AC_ARG_WITH([libmona-exec-prefix],
	    AC_HELP_STRING([--with-libmona-exec-prefix=PFX],
	                   [Exec prefix where liblibmona is installed (optional)]),
            		   [libmona_config_exec_prefix="$withval"], [libmona_config_exec_prefix=""])
AC_ARG_ENABLE([libmonatest], 
	    AC_HELP_STRING([--disable-libmonatest],       
		           [Do not try to compile and run a test LIBMONA program]),
		    	   , enable_libmonatest=yes)

  if test x$libmona_config_exec_prefix != x ; then
     libmona_config_args="$libmona_config_args --exec-prefix=$libmona_config_exec_prefix"
     if test x${LIBMONA_CONFIG+set} != xset ; then
        LIBMONA_CONFIG=$libmona_config_exec_prefix/bin/libmona-config
     fi
  fi
  if test x$libmona_config_prefix != x ; then
     libmona_config_args="$libmona_config_args --prefix=$libmona_config_prefix"
     if test x${LIBMONA_CONFIG+set} != xset ; then
        LIBMONA_CONFIG=$libmona_config_prefix/bin/libmona-config
     fi
  fi

  for module in . $4
  do
      case "$module" in
         gmodule) 
             libmona_config_args="$libmona_config_args gmodule"
         ;;
         gthread) 
             libmona_config_args="$libmona_config_args gthread"
         ;;
      esac
  done

  AC_PATH_PROG(LIBMONA_CONFIG, libmona-config, no)
  min_libmona_version=ifelse([$1], ,1.0.0,$1)
  AC_MSG_CHECKING(for LIBMONA - version >= $min_libmona_version)
  no_libmona=""
  if test "$LIBMONA_CONFIG" = "no" ; then
    no_libmona=yes
  else
    LIBMONA_CXXFLAGS=`$LIBMONA_CONFIG $libmona_config_args --cflags`
    LIBMONA_LIBS=`$LIBMONA_CONFIG $libmona_config_args --libs`
    libmona_config_major_version=`$LIBMONA_CONFIG $libmona_config_args --version | \
           sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'`
    libmona_config_minor_version=`$LIBMONA_CONFIG $libmona_config_args --version | \
           sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\2/'`
    libmona_config_micro_version=`$LIBMONA_CONFIG $libmona_config_args --version | \
           sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\3/'`
    if test "x$enable_libmonatest" = "xyes" ; then
      ac_save_CXXFLAGS="$CXXFLAGS"
      ac_save_LIBS="$LIBS"
      CXXFLAGS="-Wall $LIBMONA_CXXFLAGS"
      LIBS="$LIBMONA_LIBS $LIBS"
dnl
dnl Now check if the installed LIBMONA is sufficiently new. (Also sanity
dnl checks the results of libmona-config to some extent
dnl
      rm -f conf.libmonatest
      AC_LANG_PUSH(C++)
      AC_TRY_RUN([
#include <mona.hh>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int 
main ()
{
  unsigned int major, minor, micro;
  char *tmp_version;

  system ("touch conf.libmonatest");

  /* HP/UX 9 (%@#!) writes to sscanf strings */
  tmp_version = strdup("$min_libmona_version");
  if (sscanf(tmp_version, "%d.%d.%d", &major, &minor, &micro) != 3) {
     printf("%s, bad version string\n", "$min_libmona_version");
     exit(1);
   }

  if ((libmona_major_version != $libmona_config_major_version) ||
      (libmona_minor_version != $libmona_config_minor_version) ||
      (libmona_micro_version != $libmona_config_micro_version))
    {
      printf("\n*** 'libmona-config --version' returned %d.%d.%d, but LIBMONA (%d.%d.%d)\n", 
             $libmona_config_major_version, $libmona_config_minor_version, $libmona_config_micro_version,
             libmona_major_version, libmona_minor_version, libmona_micro_version);
      printf ("*** was found! If libmona-config was correct, then it is best\n");
      printf ("*** to remove the old version of LIBMONA. 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 libmona-config was wrong, set the environment variable LIBMONA_CONFIG\n");
      printf("*** to point to the correct copy of libmona-config, and remove the file config.cache\n");
      printf("*** before re-running configure\n");
    } 
  else if ((libmona_major_version != LIBMONA_MAJOR_VERSION) ||
	   (libmona_minor_version != LIBMONA_MINOR_VERSION) ||
           (libmona_micro_version != LIBMONA_MICRO_VERSION))
    {
      printf("*** LIBMONA header files (version %d.%d.%d) do not match\n",
	     LIBMONA_MAJOR_VERSION, LIBMONA_MINOR_VERSION, LIBMONA_MICRO_VERSION);
      printf("*** library (version %d.%d.%d)\n",
	     libmona_major_version, libmona_minor_version, libmona_micro_version);
    }
  else
    {
      if ((libmona_major_version > major) ||
        ((libmona_major_version == major) && (libmona_minor_version > minor)) ||
        ((libmona_major_version == major) && (libmona_minor_version == minor) && (libmona_micro_version >= micro)))
      {
        return 0;
       }
     else
      {
        printf("\n*** An old version of LIBMONA (%d.%d.%d) was found.\n",
               libmona_major_version, libmona_minor_version, libmona_micro_version);
        printf("*** You need a version of LIBMONA newer than %d.%d.%d. The latest version of\n",
	       major, minor, micro);
        printf("*** LIBMONA is always available from http://libmona.sourceforge.net.\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 libmona-config shell script is\n");
        printf("*** being found. The easiest way to fix this is to remove the old version\n");
        printf("*** of LIBMONA, but you can also set the LIBMONA_CONFIG environment to point to the\n");
        printf("*** correct copy of libmona-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_libmona=yes,[echo $ac_n "cross compiling; assumed OK... $ac_c"])
       CXXFLAGS="$ac_save_CXXFLAGS"
       LIBS="$ac_save_LIBS"
     fi
  fi
  if test "x$no_libmona" = x ; then
     AC_MSG_RESULT(yes)
     ifelse([$2], , :, [$2])     
  else
     AC_MSG_RESULT(no)
     if test "$LIBMONA_CONFIG" = "no" ; then
       echo "*** The libmona-config script installed by LIBMONA could not be found"
       echo "*** If LIBMONA was installed in PREFIX, make sure PREFIX/bin is in"
       echo "*** your path, or set the LIBMONA_CONFIG environment variable to the"
       echo "*** full path to libmona-config."
     else
       if test -f conf.libmonatest ; then
        :
       else
          echo "*** Could not run LIBMONA test program, checking why..."
          CXXFLAGS="$CXXFLAGS $LIBMONA_CXXFLAGS"
          LIBS="$LIBS $LIBMONA_LIBS"
          AC_TRY_LINK([
#include <mona.hh>
#include <stdio.h>
],      [ return ((libmona_major_version) || (libmona_minor_version) || (libmona_micro_version)); ],
        [ echo "*** The test program compiled, but did not run. This usually means"
          echo "*** that the run-time linker is not finding LIBMONA or finding the wrong"
          echo "*** version of LIBMONA. If it is not finding LIBMONA, 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 "***"],
        [ echo "*** The test program failed to compile or link. See the file config.log for the"
          echo "*** exact error that occured. This usually means LIBMONA was incorrectly installed"
          echo "*** or that you have moved LIBMONA since it was installed. In the latter case, you"
          echo "*** may want to edit the libmona-config script: $LIBMONA_CONFIG" ])
          CXXFLAGS="$ac_save_CXXFLAGS"
          LIBS="$ac_save_LIBS"
       fi
     fi
     LIBMONA_CXXFLAGS=""
     LIBMONA_LIBS=""
     ifelse([$3], , :, [$3])
  fi
  AC_SUBST(LIBMONA_CXXFLAGS)
  AC_SUBST(LIBMONA_LIBS)
  AC_LANG_POP(C++)
  rm -f conf.libmonatest
])