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, AC_HELP_STRING(--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.