Patches rtems-rc-20000204-0.diff from Ralf Corsepius <corsepiu@faw.uni-ulm.de>

that contains:

* Removes remaining (now illegal) references to $(SRC) from a couple of
  Makefile.ams
* Removes duplicate AC_CONFIG_SUBDIRS macro from c/configure.in
* Moves ENABLE_LIBCDIR into RTEMS_PROG_C[C|XX]_FOR_TARGET (hides LIBCDIR
  from most configure scripts, i.e. LIBCDIR becomes less visible)
* Adds RTEMS_PROG_C[C|XX]_FOR_TARGET and RTEMS_CANONICALIZE_TOOLS to
  libbsp/*/configure.ins (A minor bug in previous implementations, which
  only has an impact when switching to GNU/Cygnus canonicalization)
* Cleans up several bogus comments.
* Removes MKLIB
* Switches the version number to 4.5.0 (for testing version number
  handling)

aclocal/gcc-pipe.m4

@@ -11,17 +11,11 @@ AC_CACHE_CHECK(whether $CC_FOR_TARGET accepts --pipe,rtems_cv_gcc_pipe,
 [
 rtems_cv_gcc_pipe=no
 if test "$rtems_cv_prog_gcc" = "yes"; then
-dnl case "$host_os" in
-dnl   cygwin*)
-dnl    ;;
-dnl  *)
     echo 'void f(){}' >conftest.c
     if test -z "`${CC_FOR_TARGET} --pipe -c conftest.c 2>&1`";then
       rtems_cv_gcc_pipe=yes
     fi
     rm -f conftest*
-dnl    ;;
-dnl esac
 fi
 ])
 ])