Add minimal infrastructure for GTK+ extension.

configure.ac

@@ -591,6 +591,7 @@ AC_CONFIG_FILES([
   examples/Makefile
   include/Makefile
   lib/Makefile
+  lib/gtk/Makefile
   lib/misc/Makefile
   lib/unix/Makefile
   lib/xlib/Makefile

lib/Makefile.am

@@ -1 +1 @@
-SUBDIRS = misc unix xlib xwidgets
+SUBDIRS = gtk misc unix xlib xwidgets

lib/gtk/Makefile.am

@@ -0,0 +1,20 @@
+NULL = 
+
+lib_LTLIBRARIES = $(libelk_gtk_la)
+pkglib_LTLIBRARIES = $(gtk_la)
+
+if HAVE_GTK
+libelk_gtk_la = libelk-gtk.la
+gtk_la = gtk.la
+endif
+
+libelk_gtk_la_SOURCES = \
+	$(NULL)
+libelk_gtk_la_CFLAGS = @GTK_CFLAGS@
+libelk_gtk_la_LDFLAGS = -no-undefined
+libelk_gtk_la_LIBADD = $(top_builddir)/src/libelk.la @GTK_LIBS@
+
+gtk_la_SOURCES = init.c
+gtk_la_CFLAGS = @GTK_CFLAGS@
+gtk_la_LDFLAGS = -module -avoid-version -no-undefined
+gtk_la_LIBADD = $(top_builddir)/src/libelk.la libelk-gtk.la @GTK_LIBS@

lib/gtk/gtk.h

@@ -0,0 +1,33 @@
+/* gtk.h
+ *
+ * $Id$
+ *
+ * Copyright 1990, 1991, 1992, 1993, 1994, 1995, Oliver Laumann, Berlin
+ * Copyright 2002, 2003 Sam Hocevar <sam@hocevar.net>, Paris
+ *
+ * This software was derived from Elk 1.2, which was Copyright 1987, 1988,
+ * 1989, Nixdorf Computer AG and TELES GmbH, Berlin (Elk 1.2 has been written
+ * by Oliver Laumann for TELES Telematic Services, Berlin, in a joint project
+ * between TELES and Nixdorf Microprocessor Engineering, Berlin).
+ *
+ * Oliver Laumann, TELES GmbH, Nixdorf Computer AG and Sam Hocevar, as co-
+ * owners or individual owners of copyright in this software, grant to any
+ * person or company a worldwide, royalty free, license to
+ *
+ *    i) copy this software,
+ *   ii) prepare derivative works based on this software,
+ *  iii) distribute copies of this software or derivative works,
+ *   iv) perform this software, or
+ *    v) display this software,
+ *
+ * provided that this notice is not removed and that neither Oliver Laumann
+ * nor Teles nor Nixdorf are deemed to have made any representations as to
+ * the suitability of this software for any purpose nor are held responsible
+ * for any defects of this software.
+ *
+ * THERE IS ABSOLUTELY NO WARRANTY FOR THIS SOFTWARE.
+ */
+
+#include <scheme.h>
+#include <gtk/gtk.h>
+#include "config.h"

lib/gtk/init.c

@@ -0,0 +1,35 @@
+/* init.c
+ *
+ * $Id$
+ *
+ * Copyright 1990, 1991, 1992, 1993, 1994, 1995, Oliver Laumann, Berlin
+ * Copyright 2002, 2003 Sam Hocevar <sam@hocevar.net>, Paris
+ *
+ * This software was derived from Elk 1.2, which was Copyright 1987, 1988,
+ * 1989, Nixdorf Computer AG and TELES GmbH, Berlin (Elk 1.2 has been written
+ * by Oliver Laumann for TELES Telematic Services, Berlin, in a joint project
+ * between TELES and Nixdorf Microprocessor Engineering, Berlin).
+ *
+ * Oliver Laumann, TELES GmbH, Nixdorf Computer AG and Sam Hocevar, as co-
+ * owners or individual owners of copyright in this software, grant to any
+ * person or company a worldwide, royalty free, license to
+ *
+ *    i) copy this software,
+ *   ii) prepare derivative works based on this software,
+ *  iii) distribute copies of this software or derivative works,
+ *   iv) perform this software, or
+ *    v) display this software,
+ *
+ * provided that this notice is not removed and that neither Oliver Laumann
+ * nor Teles nor Nixdorf are deemed to have made any representations as to
+ * the suitability of this software for any purpose nor are held responsible
+ * for any defects of this software.
+ *
+ * THERE IS ABSOLUTELY NO WARRANTY FOR THIS SOFTWARE.
+ */
+
+#include "gtk.h"
+
+void elk_init_gtk_init () {
+    P_Provide (Intern ("gtk.la"));
+}