dnl Check if --with-expat[=PREFIX] is specified and

dnl Expat >= 1.95.0 is installed in the system.

dnl If yes, substitute EXPAT_CFLAGS, EXPAT_LIBS with regard to

dnl the specified PREFIX and set with_expat to PREFIX, or 'yes' if PREFIX

dnl has not been specified. Also HAVE_LIBEXPAT, HAVE_EXPAT_H are defined.

dnl If --with-expat has not been specified, set with_expat to 'no'.

dnl In addition, an Automake conditional EXPAT_INSTALLED is set accordingly.

dnl This is necessary to adapt a whole lot of packages that have expat

dnl bundled as a static library.

AC_DEFUN(AM_WITH_EXPAT,

[ AC_ARG_WITH(expat,

	      [  --with-expat=PREFIX     Use system Expat library],

	      , with_expat=no)

  AM_CONDITIONAL(EXPAT_INSTALLED, test $with_expat != no)

  EXPAT_CFLAGS=

  EXPAT_LIBS=

  if test $with_expat != no; then

	if test $with_expat != yes; then

		EXPAT_CFLAGS="-I$with_expat/include"

		EXPAT_LIBS="-L$with_expat/lib"

	fi

	AC_CHECK_LIB(expat, XML_ParserCreate,

		     [ EXPAT_LIBS="$EXPAT_LIBS -lexpat"

		       expat_found=yes ],

		     [ expat_found=no ],

		     "$EXPAT_LIBS")

	if test $expat_found = no; then

		AC_MSG_ERROR([Could not find the Expat library])

	fi

	expat_save_CFLAGS="$CFLAGS"

	CFLAGS="$CFLAGS $EXPAT_CFLAGS"

	AC_CHECK_HEADERS(expat.h, , expat_found=no)

	if test $expat_found = no; then

		AC_MSG_ERROR([Could not find expat.h])

	fi

	CFLAGS="$expat_save_CFLAGS"

  fi

  AC_SUBST(EXPAT_CFLAGS)

  AC_SUBST(EXPAT_LIBS)

])