# Configure paths for LIBXML2

# Mike Hommey 2004-06-19

# use CPPFLAGS instead of CFLAGS

# Toshio Kuratomi 2001-04-21

# Adapted from:

# Configure paths for GLIB

# Owen Taylor     97-11-3

dnl AM_PATH_XML2([MINIMUM-VERSION, [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]]])

dnl Test for XML, and define XML_CPPFLAGS and XML_LIBS

dnl

AC_DEFUN([AM_PATH_XML2],[ 

AC_ARG_WITH(xml-prefix,

            [  --with-xml-prefix=PFX   Prefix where libxml is installed (optional)],

            xml_config_prefix="$withval", xml_config_prefix="")

AC_ARG_WITH(xml-exec-prefix,

            [  --with-xml-exec-prefix=PFX Exec prefix where libxml is installed (optional)],

            xml_config_exec_prefix="$withval", xml_config_exec_prefix="")

AC_ARG_ENABLE(xmltest,

              [  --disable-xmltest       Do not try to compile and run a test LIBXML program],,

              enable_xmltest=yes)

  if test x$xml_config_exec_prefix != x ; then

     xml_config_args="$xml_config_args"

     if test x${XML2_CONFIG+set} != xset ; then

        XML2_CONFIG=$xml_config_exec_prefix/bin/xml2-config

     fi

  fi

  if test x$xml_config_prefix != x ; then

     xml_config_args="$xml_config_args --prefix=$xml_config_prefix"

     if test x${XML2_CONFIG+set} != xset ; then

        XML2_CONFIG=$xml_config_prefix/bin/xml2-config

     fi

  fi

  AC_PATH_PROG(XML2_CONFIG, xml2-config, no)

  min_xml_version=ifelse([$1], ,2.0.0,[$1])

  AC_MSG_CHECKING(for libxml - version >= $min_xml_version)

  no_xml=""

  if test "$XML2_CONFIG" = "no" ; then

    no_xml=yes

  else

    XML_CPPFLAGS=`$XML2_CONFIG $xml_config_args --cflags`

    XML_LIBS=`$XML2_CONFIG $xml_config_args --libs`

    xml_config_major_version=`$XML2_CONFIG $xml_config_args --version | \

           sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'`

    xml_config_minor_version=`$XML2_CONFIG $xml_config_args --version | \

           sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\2/'`

    xml_config_micro_version=`$XML2_CONFIG $xml_config_args --version | \

           sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\3/'`

    if test "x$enable_xmltest" = "xyes" ; then

      ac_save_CPPFLAGS="$CPPFLAGS"

      ac_save_LIBS="$LIBS"

      CPPFLAGS="$CPPFLAGS $XML_CPPFLAGS"

      LIBS="$XML_LIBS $LIBS"

dnl

dnl Now check if the installed libxml is sufficiently new.

dnl (Also sanity checks the results of xml2-config to some extent)

dnl

      rm -f conf.xmltest

      AC_TRY_RUN([

#include <stdlib.h>

#include <stdio.h>

#include <string.h>

#include <libxml/xmlversion.h>

int 

main()

{

  int xml_major_version, xml_minor_version, xml_micro_version;

  int major, minor, micro;

  char *tmp_version;

  system("touch conf.xmltest");

  /* Capture xml2-config output via autoconf/configure variables */

  /* HP/UX 9 (%@#!) writes to sscanf strings */

  tmp_version = (char *)strdup("$min_xml_version");

  if (sscanf(tmp_version, "%d.%d.%d", &major, &minor, &micro) != 3) {

     printf("%s, bad version string from xml2-config\n", "$min_xml_version");

     exit(1);

   }

   free(tmp_version);

   /* Capture the version information from the header files */

   tmp_version = (char *)strdup(LIBXML_DOTTED_VERSION);

   if (sscanf(tmp_version, "%d.%d.%d", &xml_major_version, &xml_minor_version, &xml_micro_version) != 3) {

     printf("%s, bad version string from libxml includes\n", "LIBXML_DOTTED_VERSION");

     exit(1);

   }

   free(tmp_version);

 /* Compare xml2-config output to the libxml headers */

  if ((xml_major_version != $xml_config_major_version) ||

      (xml_minor_version != $xml_config_minor_version) ||

      (xml_micro_version != $xml_config_micro_version))

    {

      printf("*** libxml header files (version %d.%d.%d) do not match\n",

         xml_major_version, xml_minor_version, xml_micro_version);

      printf("*** xml2-config (version %d.%d.%d)\n",

         $xml_config_major_version, $xml_config_minor_version, $xml_config_micro_version);

      return 1;

    } 

/* Compare the headers to the library to make sure we match */

  /* Less than ideal -- doesn't provide us with return value feedback, 

   * only exits if there's a serious mismatch between header and library.

   */

    LIBXML_TEST_VERSION;

    /* Test that the library is greater than our minimum version */

    if ((xml_major_version > major) ||

        ((xml_major_version == major) && (xml_minor_version > minor)) ||

        ((xml_major_version == major) && (xml_minor_version == minor) &&

        (xml_micro_version >= micro)))

      {

        return 0;

       }

     else

      {

        printf("\n*** An old version of libxml (%d.%d.%d) was found.\n",

               xml_major_version, xml_minor_version, xml_micro_version);

        printf("*** You need a version of libxml newer than %d.%d.%d. The latest version of\n",

           major, minor, micro);

        printf("*** libxml is always available from ftp://ftp.xmlsoft.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 xml2-config shell script is\n");

        printf("*** being found. The easiest way to fix this is to remove the old version\n");

        printf("*** of LIBXML, but you can also set the XML2_CONFIG environment to point to the\n");

        printf("*** correct copy of xml2-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_xml=yes,[echo $ac_n "cross compiling; assumed OK... $ac_c"])

       CPPFLAGS="$ac_save_CPPFLAGS"

       LIBS="$ac_save_LIBS"

     fi

  fi

  if test "x$no_xml" = x ; then

     AC_MSG_RESULT(yes (version $xml_config_major_version.$xml_config_minor_version.$xml_config_micro_version))

     ifelse([$2], , :, [$2])     

  else

     AC_MSG_RESULT(no)

     if test "$XML2_CONFIG" = "no" ; then

       echo "*** The xml2-config script installed by LIBXML could not be found"

       echo "*** If libxml was installed in PREFIX, make sure PREFIX/bin is in"

       echo "*** your path, or set the XML2_CONFIG environment variable to the"

       echo "*** full path to xml2-config."

     else

       if test -f conf.xmltest ; then

        :

       else

          echo "*** Could not run libxml test program, checking why..."

          CPPFLAGS="$CPPFLAGS $XML_CPPFLAGS"

          LIBS="$LIBS $XML_LIBS"

          AC_TRY_LINK([

#include <libxml/xmlversion.h>

#include <stdio.h>

],      [ LIBXML_TEST_VERSION; return 0;],

        [ echo "*** The test program compiled, but did not run. This usually means"

          echo "*** that the run-time linker is not finding LIBXML or finding the wrong"

          echo "*** version of LIBXML. If it is not finding LIBXML, 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 occurred. This usually means LIBXML was incorrectly installed"

          echo "*** or that you have moved LIBXML since it was installed. In the latter case, you"

          echo "*** may want to edit the xml2-config script: $XML2_CONFIG" ])

          CPPFLAGS="$ac_save_CPPFLAGS"

          LIBS="$ac_save_LIBS"

       fi

     fi

     XML_CPPFLAGS=""

     XML_LIBS=""

     ifelse([$3], , :, [$3])

  fi

  AC_SUBST(XML_CPPFLAGS)

  AC_SUBST(XML_LIBS)

  rm -f conf.xmltest

])