+want_x11=yes
+AC_ARG_ENABLE(x11,
+[ --enable-x11 enable if you want X11 support [default=yes]],
+ [want_x11="$enableval"])
+
+
+if test "x$want_x11" = "xyes"; then
+ AC_PATH_X
+ AC_PATH_XTRA
+ CFLAGS="$CFLAGS $X_CFLAGS"
+ LIBS="$LIBS $X_LIBS $X11_LIBS"
+ LDFLAGS="$LDFLAGS $LIBS $X_PRE_LIBS"
+ if test "x$X_DISPLAY_MISSING" = xyes; then
+ AC_MSG_ERROR([something went wrong when checking for X11, you're probably missing headers or it's not installed, either re-run configure with --disable-x11, or fix this])
+ fi
+ AC_DEFINE(X11, 1, [Define if you want to use X11])
+ AC_DEFINE(HAVE_X11, 1, [Define if you have X11])
+ AM_CONDITIONAL(BUILD_X11, true)
+ if test $dah != "no"; then
+ AC_DEFINE(DOUBLE_BUFFER, 1, [Define if you want support for the DBE extension])
+ AC_CHECK_LIB(Xext, XdbeQueryExtension, [AC_DEFINE([HAVE_XDBE], 1, [Xdbe]) LIBS="$LIBS -lXext"],
+ [AC_MSG_ERROR([something went wrong when checking for Xdbe (double buffer extension)])])
+ fi
+else
+ AM_CONDITIONAL(BUILD_X11, false)