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  expat_source=auto
else
  if test -d "$expat_source_dir/xmlparse"; then
    # old expat
    CPPFLAGS="-I$expat_source_dir/xmlparse $CPPFLAGS"
  else
    # new expat
    CPPFLAGS="-I$expat_source_dir/lib $CPPFLAGS"
  fi
fi

AC_CHECK_HEADERS(expat.h xmlparse.h)


oLIBS="$LIBS"
AC_CHECK_LIB(xmltok, main, xmlt=1, xmlt=0)

# Raptor needs XML_ParserCreate expat function (not namespace one)
AC_CHECK_LIB(xmlparse, XML_ParserCreate, xmlp=1, xmlp=0, -lxmltok)

LIBS="$oLIBS"
AC_CHECK_LIB(expat, XML_ParserCreate, libexpat=1, libexpat=0)

LIBS="$oLIBS"
AC_MSG_CHECKING(for working expat in libxmlparse and libxmltok)
if test $xmlp = 1 -a $xmlt = 1 -a  $ac_cv_header_xmlparse_h = yes; then
  LIBS="$LIBS -lxmlparse -lxmltok"
  AC_TRY_RUN([#include <stdio.h>
	     main() {XML_ParserCreate(NULL); return(0);}],
             worked=yes, worked=no, worked=no)
  if test $worked = yes; then
    # Old expat
    have_expat_lib=1
    have_expat=1
    expat_libs="-lxmlparse -lxmltok"

    AC_MSG_RESULT(yes)
  else
    AC_MSG_RESULT(no)
  fi
else
  AC_MSG_RESULT(no)
fi

LIBS="$oLIBS"

AC_MSG_CHECKING(for working expat in libexpat)
if test $libexpat = 1 -a $ac_cv_header_expat_h = yes ; then
  LIBS="$LIBS -lexpat"
  AC_TRY_RUN([#include <stdio.h>
             main() {XML_ParserCreate(NULL); return(0);}],
             worked=yes, worked=no, worked=no)
  if test $worked = yes; then
    # New expat - expat-1.95.0 or later
    have_expat_lib=1
    have_expat=1
    expat_libs="-lexpat"

    AC_MSG_RESULT(yes)

    AC_MSG_CHECKING(for expat support of UTF-8 BOM)
    AC_TRY_RUN([
#include <stdio.h>
#include <string.h>
#include <stdarg.h>

#ifdef HAVE_EXPAT_H
#include <expat.h>
#else
#ifdef HAVE_XMLPARSE_H
#include <xmlparse.h>
#endif
#endif

int main(int argc, char **argv) {
  const char *xml_buffer=
     /* UTF-8 BOM */
     "\xef\xbb\xbf<?xml version='1.0' encoding='UTF-8'?><tag/>";
  XML_Parser xp=XML_ParserCreate(NULL);
  int  len=strlen(xml_buffer);
  
  /* This might cause an error on expat 1.95.1 */
  int rc=XML_Parse(xp, xml_buffer, len, 1);

  /* if expat gives an error ... */
  if(!rc) {
    /* then the next line will crash in normal_updatePosition  */
    int line=XML_GetCurrentLineNumber(xp);
  }
  XML_ParserFree(xp);

  return 0;
}
],
            AC_MSG_RESULT(yes),
            AC_DEFINE(EXPAT_UTF8_BOM_CRASH, 1, [does expat crash when it sees an initial UTF8 BOM?])
            AC_MSG_RESULT(no)
            AC_MSG_WARN(The available expat crashes on XML UTF-8 BOM in documents)
            AC_MSG_WARN(Fix either by using libxml or expat 1.95.2+))

  else
    AC_MSG_RESULT(no)
  fi
else
  AC_MSG_RESULT(no)
fi

LIBS="$oLIBS"

AC_ARG_WITH(xml2-config, [  --with-xml2-config=PATH   Location of libxml xml2-config []], xml2_config="$withval", xml2_config="")

if test "X$xml2_config" != "X" ; then
  AC_MSG_CHECKING(for $xml2_config)

  if test -f $xml2_config ; then
    XML_CONFIG=$xml2_config
    AC_MSG_RESULT(yes)
  else
    AC_MSG_RESULT(no - searching PATH)
  fi
fi
if test "X$XML_CONFIG" = "X"; then
  AC_CHECK_PROGS(XML_CONFIG, xml2-config)
fi

AC_ARG_WITH(xslt-config, [  --with-xslt-config=PATH   Location of libxslt xslt-config []], xslt_config="$withval", xslt_config="")

if test "X$xslt_config" != "X" ; then
  AC_MSG_CHECKING(for $xslt_config)

  if test -f $xslt_config ; then
    XSLT_CONFIG=$xslt_config
    AC_MSG_RESULT(yes)
  else
    AC_MSG_RESULT(no - searching PATH)
  fi
fi
if test "X$XSLT_CONFIG" = "X"; then
  AC_CHECK_PROGS(XSLT_CONFIG, xslt-config)
fi

AC_ARG_WITH(curl-config, [  --with-curl-config=PATH   Location of libcurl curl-config []], curl_config="$withval", curl_config="")

if test "X$curl_config" != "X" ; then
  AC_MSG_CHECKING(for $curl_config)

  if test -f $curl_config ; then
    CURL_CONFIG=$curl_config
    AC_MSG_RESULT(yes)
  else
    AC_MSG_RESULT(no - searching PATH)
  fi
fi
if test "X$CURL_CONFIG" = "X"; then
  AC_CHECK_PROGS(CURL_CONFIG, curl-config)
fi