diff --git a/c/ChangeLog b/c/ChangeLog
index fb96e08034..c0b891832b 100644
--- a/c/ChangeLog
+++ b/c/ChangeLog
@@ -1,3 +1,8 @@
+2003-10-01	Ralf Corsepius <corsepiu@faw.uni-ulm.de>
+
+	* acinclude.m4: New.
+	Add RTEMS_CHECK_CPU.
+
 2003-09-26	Joel Sherrill <joel@OARcorp.com>
 
 	* ACKNOWLEDGEMENTS: Obsoleting HP PA-RISC port and removing all
diff --git a/c/acinclude.m4 b/c/acinclude.m4
new file mode 100644
index 0000000000..4b7ff6bd16
--- /dev/null
+++ b/c/acinclude.m4
@@ -0,0 +1,18 @@
+dnl $Id$
+
+dnl check if RTEMS support a cpu
+AC_DEFUN(RTEMS_CHECK_CPU,
+[dnl
+AC_REQUIRE([RTEMS_TOP])
+AC_REQUIRE([RTEMS_CANONICAL_TARGET_CPU])
+
+# Is this a supported CPU?
+AC_MSG_CHECKING([if cpu $RTEMS_CPU is supported])
+# FIXME: Temporary hack
+if test -d "$srcdir/${RTEMS_TOPdir}/c/src/lib/libbsp/$RTEMS_CPU"; then
+  AC_MSG_RESULT(yes)
+else
+  AC_MSG_ERROR(no)
+fi
+])dnl
+