dnl
dnl JAPHAR_GREP_CFLAGS(flag, cmd_if_missing, cmd_if_present)
dnl
dnl From Japhar.  Report changes to japhar@hungry.com
dnl
AC_DEFUN([JAPHAR_GREP_CFLAGS],
[case "$CFLAGS" in
"$1" | "$1 "* | *" $1" | *" $1 "* )
  ifelse($#, 3, [$3], [:])
  ;;
*)
  $2
  ;;
esac
])

dnl
dnl Test for __attribute__ ((unused))
dnl Based on code from the tcpdump version 3.7.2 source.
dnl

AC_DEFUN([AC_C___ATTRIBUTE__], [
AC_MSG_CHECKING(for __attribute__)
AC_CACHE_VAL(ac_cv___attribute__, [
AC_TRY_COMPILE([
#include <stdlib.h>
static void foo (void) __attribute__ ((unused));

static void
foo (void)
{
  exit(1);
}
],
[
  exit (0);
],
ac_cv___attribute__=yes,
ac_cv___attribute__=no)])
if test "$ac_cv___attribute__" = "yes"; then
  AC_DEFINE(UNUSED, __attribute__ ((unused)), [define if your compiler has __att
ribute__ ((unused))])
else
  AC_DEFINE(UNUSED,,)
fi
AC_MSG_RESULT($ac_cv___attribute__)
])

dnl Autoconf macros for libprelude
dnl $id$

# Modified for LIBPRELUDE -- Yoann Vandoorselaere
# Modified for LIBGNUTLS -- nmav
# Configure paths for LIBGCRYPT
# Shamelessly stolen from the one of XDELTA by Owen Taylor
# Werner Koch   99-12-09

dnl AM_PATH_LIBPRELUDE([MINIMUM-VERSION, [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND ]]])
dnl Test for libprelude, and define LIBPRELUDE_PREFIX, LIBPRELUDE_CFLAGS, LIBPRELUDE_PTHREAD_CFLAGS, 
dnl LIBPRELUDE_LDFLAGS, and LIBPRELUDE_LIBS
dnl
AC_DEFUN([AM_PATH_LIBPRELUDE],
[dnl
dnl Get the cflags and libraries from the libprelude-config script
dnl
AC_ARG_WITH(libprelude-prefix,
          [  --with-libprelude-prefix=PFX   Prefix where libprelude is installed (optional)],
          libprelude_config_prefix="$withval", libprelude_config_prefix="")

  if test x$libprelude_config_prefix != x ; then
     if test x${LIBPRELUDE_CONFIG+set} != xset ; then
        LIBPRELUDE_CONFIG=$libprelude_config_prefix/bin/libprelude-config
     fi
  fi

  AC_PATH_PROG(LIBPRELUDE_CONFIG, libprelude-config, no)
  min_libprelude_version=ifelse([$1], ,0.1.0,$1)
  AC_MSG_CHECKING(for libprelude - version >= $min_libprelude_version)
  no_libprelude=""
  if test "$LIBPRELUDE_CONFIG" = "no" ; then
    no_libprelude=yes
  else
    LIBPRELUDE_CFLAGS=`$LIBPRELUDE_CONFIG $libprelude_config_args --cflags`
    LIBPRELUDE_PTHREAD_CFLAGS=`$LIBPRELUDE_CONFIG $libprelude_config_args --pthread-cflags`
    LIBPRELUDE_LDFLAGS=`$LIBPRELUDE_CONFIG $libprelude_config_args --ldflags`
    LIBPRELUDE_LIBS=`$LIBPRELUDE_CONFIG $libprelude_config_args --libs`
    LIBPRELUDE_PREFIX=`$LIBPRELUDE_CONFIG $libprelude_config_args --prefix`
    LIBPRELUDE_CONFIG_PREFIX=`$LIBPRELUDE_CONFIG $libprelude_config_args --config-prefix`
    libprelude_config_version=`$LIBPRELUDE_CONFIG $libprelude_config_args --version`


      ac_save_CFLAGS="$CFLAGS"
      ac_save_LDFLAGS="$LDFLAGS"
      ac_save_LIBS="$LIBS"
      CFLAGS="$CFLAGS $LIBPRELUDE_CFLAGS"
      LDFLAGS="$LDFLAGS $LIBPRELUDE_LDFLAGS"
      LIBS="$LIBS $LIBPRELUDE_LIBS"
dnl
dnl Now check if the installed libprelude is sufficiently new. Also sanity
dnl checks the results of libprelude-config to some extent
dnl
      rm -f conf.libpreludetest
      AC_TRY_RUN([
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <libprelude/prelude.h>

int
main ()
{
    system ("touch conf.libpreludetest");

    if( strcmp( prelude_check_version(NULL), "$libprelude_config_version" ) )
    {
      printf("\n*** 'libprelude-config --version' returned %s, but LIBPRELUDE (%s)\n",
             "$libprelude_config_version", prelude_check_version(NULL) );
      printf("*** was found! If libprelude-config was correct, then it is best\n");
      printf("*** to remove the old version of LIBPRELUDE. 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 libprelude-config was wrong, set the environment variable LIBPRELUDE_CONFIG\n");
      printf("*** to point to the correct copy of libprelude-config, and remove the file config.cache\n");
      printf("*** before re-running configure\n");
    }
    else if ( strcmp(prelude_check_version(NULL), LIBPRELUDE_VERSION ) )
    {
      printf("\n*** LIBPRELUDE header file (version %s) does not match\n", LIBPRELUDE_VERSION);
      printf("*** library (version %s)\n", prelude_check_version(NULL) );
    }
    else
    {
      if ( prelude_check_version( "$min_libprelude_version" ) )
      {
        return 0;
      }
     else
      {
        printf("no\n*** An old version of LIBPRELUDE (%s) was found.\n",
                prelude_check_version(NULL) );
        printf("*** You need a version of LIBPRELUDE newer than %s. The latest version of\n",
               "$min_libprelude_version" );
        printf("*** LIBPRELUDE is always available from http://www.prelude-ids.org/download/releases.\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 libprelude-config shell script is\n");
        printf("*** being found. The easiest way to fix this is to remove the old version\n");
        printf("*** of LIBPRELUDE, but you can also set the LIBPRELUDE_CONFIG environment to point to the\n");
        printf("*** correct copy of libprelude-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_libprelude=yes,[echo $ac_n "cross compiling; assumed OK... $ac_c"])
       CFLAGS="$ac_save_CFLAGS"
       LIBS="$ac_save_LIBS"
       LDFLAGS="$ac_save_LDFLAGS"
  fi

  if test "x$no_libprelude" = x ; then
     AC_MSG_RESULT(yes)
     ifelse([$2], , :, [$2])
  else
     if test -f conf.libpreludetest ; then
        :
     else
        AC_MSG_RESULT(no)
     fi
     if test "$LIBPRELUDE_CONFIG" = "no" ; then
       echo "*** The libprelude-config script installed by LIBPRELUDE could not be found"
       echo "*** If LIBPRELUDE was installed in PREFIX, make sure PREFIX/bin is in"
       echo "*** your path, or set the LIBPRELUDE_CONFIG environment variable to the"
       echo "*** full path to libprelude-config."
     else
       if test -f conf.libpreludetest ; then
        :
       else
          echo "*** Could not run libprelude test program, checking why..."
          CFLAGS="$CFLAGS $LIBPRELUDE_CFLAGS"
	  LDFLAGS="$LDFLAGS $LIBPRELUDE_LDFLAGS"
          LIBS="$LIBS $LIBPRELUDE_LIBS"
          AC_TRY_LINK([
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <libprelude/prelude.h>
],      [ return !!prelude_check_version(NULL); ],
        [ echo "*** The test program compiled, but did not run. This usually means"
          echo "*** that the run-time linker is not finding LIBPRELUDE or finding the wrong"
          echo "*** version of LIBPRELUDE. If it is not finding LIBPRELUDE, 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 LIBPRELUDE was incorrectly installed"
          echo "*** or that you have moved LIBPRELUDE since it was installed. In the latter case, you"
          echo "*** may want to edit the libprelude-config script: $LIBPRELUDE_CONFIG" ])
          CFLAGS="$ac_save_CFLAGS"
	  LDFLAGS="$ac_save_LDFLAGS"
          LIBS="$ac_save_LIBS"
       fi
     fi
     LIBPRELUDE_CFLAGS=""
     LIBPRELUDE_LDFLAGS=""
     LIBPRELUDE_LIBS=""
     ifelse([$3], , :, [$3])
  fi
  rm -f conf.libpreludetest
  AC_SUBST(LIBPRELUDE_CFLAGS)
  AC_SUBST(LIBPRELUDE_PTHREAD_CFLAGS)
  AC_SUBST(LIBPRELUDE_LDFLAGS)
  AC_SUBST(LIBPRELUDE_LIBS)
  AC_SUBST(LIBPRELUDE_PREFIX)
  AC_SUBST(LIBPRELUDE_CONFIG_PREFIX)
])

dnl *-*wedit:notab*-*  Please keep this as the last line.