],[
        AC_MSG_NOTICE([Determining mozilla/firefox packages to build against])
        PKG_CHECK_MODULES(MOZPLUG,[mozilla-plugin],[AC_SUBST(MOZPLUG_CFLAGS) MOZPLUG_CFLAGS="${MOZPLUG_CFLAGS} -I`$PKG_CONFIG --variable=includedir mozilla-plugin`"
MOZILLA_HOME=`$PKG_CONFIG --variable=libdir mozilla-plugin`
],[AC_MSG_WARN([mozilla-plugin not found])])

        if test "$MOZPLUG_CFLAGS" = ""; then
                PKG_CHECK_MODULES(MOZPLUG,[firefox-plugin firefox-xpcom],[AC_SUBST(MOZPLUG_CFLAGS) MOZPLUG_CFLAGS="${MOZPLUG_CFLAGS} -I`$PKG_CONFIG --variable=includedir firefox-plugin`"
MOZILLA_HOME=`$PKG_CONFIG --variable=libdir firefox-plugin`
],[AC_MSG_WARN([firefox-plugin not found])])
        fi
        if test "$MOZPLUG_CFLAGS" = ""; then
                PKG_CHECK_MODULES(MOZPLUG,[seamonkey-plugin],[AC_SUBST(MOZPLUG_CFLAGS) MOZPLUG_CFLAGS="${MOZPLUG_CFLAGS} -I`$PKG_CONFIG --variable=includedir seamonkey-plugin`"
MOZILLA_HOME=`$PKG_CONFIG --variable=libdir seamonkey-plugin`
],[AC_MSG_WARN([seamonkey-plugin not found])])
        fi
        if test "$MOZPLUG_CFLAGS" = ""; then
                PKG_CHECK_MODULES(MOZPLUG,[xulrunner-plugin],[AC_SUBST(MOZPLUG_CFLAGS) MOZPLUG_CFLAGS="${MOZPLUG_CFLAGS} -I`$PKG_CONFIG --variable=includedir xulrunner-plugin`"
MOZILLA_HOME=`$PKG_CONFIG --variable=libdir xulrunner-plugin`
],[AC_MSG_WARN([xulrunner-plugin not found])])
        fi
        if test "$MOZPLUG_CFLAGS" = ""; then
                PKG_CHECK_MODULES(MOZPLUG,[iceape-plugin],[AC_SUBST(MOZPLUG_CFLAGS) MOZPLUG_CFLAGS="${MOZPLUG_CFLAGS} -I`$PKG_CONFIG --variable=includedir iceape-plugin`"
MOZILLA_HOME=`$PKG_CONFIG --variable=libdir iceape-plugin`
],[AC_MSG_WARN([iceape-plugin not found])])
        fi

        if test "$MOZPLUG_CFLAGS" = ""; then
                AC_MSG_ERROR([Unable to find mozilla or firefox development files])
        fi
  ]
)