dnl Checks for tools needed to generate manual pages

AC_DEFUN([CHECK_XML_TOOLS],

[

  AC_PATH_PROG([XSLTPROC], [xsltproc])

  if test ! -x "$XSLTPROC"; then

    AC_MSG_ERROR([Could not find xsltproc])

  fi

  AC_PATH_PROG([XMLLINT], [xmllint])

  if test ! -x "$XMLLINT"; then

    AC_MSG_ERROR([Could not find xmllint])

  fi

  AC_PATH_PROG([XMLCATALOG], [xmlcatalog])

  if test ! -x "$XMLCATALOG"; then

    AC_MSG_ERROR([Could not find xmlcatalog])

  fi

])

dnl Usage:

dnl   CHECK_STYLESHEET_URI(FILE, URI, [FRIENDLY-NAME])

dnl Checks if the XML catalog given by FILE exists and

dnl if a particular URI appears in the XML catalog

AC_DEFUN([CHECK_STYLESHEET],

[

  AC_CHECK_FILE($1, [], [AC_MSG_ERROR([could not find XML catalog])])

  AC_MSG_CHECKING([for ifelse([$3],,[$2],[$3]) in XML catalog])

  if AC_RUN_LOG([$XMLCATALOG --noout "$1" "$2" >&2]); then

    AC_MSG_RESULT([yes])

  else

    AC_MSG_ERROR([could not find ifelse([$3],,[$2],[$3]) in XML catalog])

  fi

])