Patch rtems-rc-4.5.0-7-cvs.diff from Ralf Corsepius <corsepiu@faw.uni-ulm.de>.

The patch contains:

  * Many small cleanups wrt. make VARIANT=[DEBUG|PROFILE] support
  * several modifications to make/custom/*.cfg
  * Merger with the mvme2307.cfg you had posted two weeks ago (Please
    check it, I did not check it against to version you posted today).
  * Added a check to the toplevel configure.in to refuse building inside
    of the source tree.

configure.in

@@ -1,4 +1,3 @@
-
 dnl Process this file with autoconf to produce a configure script.
 dnl
 dnl  $Id$
@@ -7,6 +6,14 @@ AC_PREREQ(2.13)
 AC_INIT(c)
 RTEMS_TOP(.)
 
+# Abort if trying to build inside of the source tree.
+if test -f VERSION; then
+  rm -f config.cache config.log confdefs.h
+  AC_MSG_ERROR([***]
+    [Attempt to build inside of the source tree]
+    [Please use a separate build directory, instead] )
+fi
+
 RTEMS_CANONICAL_TARGET_CPU
 AM_INIT_AUTOMAKE(rtems,$RTEMS_VERSION,no)
 AM_MAINTAINER_MODE