t-vxworks (LIBGCC2_INCLUDES): Pass -nostdinc.

gcc/
	* config/t-vxworks (LIBGCC2_INCLUDES): Pass -nostdinc.
	Use $MULTIDIR to choose between the kernel and RTP headers,
	and use $WIND_BASE and $WIND_USR to locate them.

From-SVN: r122474

gcc/ChangeLog

+2007-03-02  Richard Sandiford  <richard@codesourcery.com>
+
+	* config/t-vxworks (LIBGCC2_INCLUDES): Pass -nostdinc.
+	Use $MULTIDIR to choose between the kernel and RTP headers,
+	and use $WIND_BASE and $WIND_USR to locate them.
+
 2007-03-02  Uros Bizjak  <ubizjak@gmail.com>
 	    Michael Meissner  <michael.meissner@amd.com>
 

gcc/config/t-vxworks

@@ -21,8 +21,11 @@ EXTRA_HEADERS += $(srcdir)/gthr-vxworks.h gthr-default.h
 # This ensures that the correct target headers are used; some
 # VxWorks system headers have names that collide with GCC's
 # internal (host) headers, e.g. regs.h.
-# FIXME: May not be necessary anymore.
-LIBGCC2_INCLUDES="-I$(SYSTEM_HEADER_DIR)"
+LIBGCC2_INCLUDES = -nostdinc -I \
+  `case "/$$(MULTIDIR)" in \
+     */mrtp*) echo $(WIND_USR)/h ;; \
+     *) echo $(WIND_BASE)/target/h ;; \
+   esac`
 
 EXTRA_MULTILIB_PARTS =