spu-elf.h (STANDARD_STARTFILE_PREFIX_2): Disable default.

	* config/spu/spu-elf.h (STANDARD_STARTFILE_PREFIX_2): Disable default.
	(STANDARD_INCLUDE_DIR): Redefine to "/include".
	(LOCAL_INCLUDE_DIR): Undefine.
	* config/spu/t-spu-elf (NATIVE_SYSTEM_HEADER_DIR): Define.

From-SVN: r141870

gcc/ChangeLog

+2008-11-14  Ulrich Weigand  <Ulrich.Weigand@de.ibm.com>
+
+	* config/spu/spu-elf.h (STANDARD_STARTFILE_PREFIX_2): Disable default.
+	(STANDARD_INCLUDE_DIR): Redefine to "/include".
+	(LOCAL_INCLUDE_DIR): Undefine.
+	* config/spu/t-spu-elf (NATIVE_SYSTEM_HEADER_DIR): Define.
+
 2008-11-14  Vladimir Makarov  <vmakarov@redhat.com>
 
 	PR rtl-optimization/37397

gcc/config/spu/spu-elf.h

@@ -24,6 +24,23 @@
             asm_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN)
 
 
+/* The following macros define "native" directory locations; on the SPU,
+   these are used only when building the compiler with --with-sysroot.
+   This can be used to build a pair of PPU and SPU cross-compilers with
+   a common sysroot; the SPU compiler will search for its files in
+   ${sysroot}/include and ${sysroot}/lib.  */
+
+/* STANDARD_STARTFILE_PREFIX_1 is "/lib", which we keep.
+   STANDARD_STARTFILE_PREFIX_2 is "/usr/lib" -- we remove this.  */
+#undef STANDARD_STARTFILE_PREFIX_2
+#define STANDARD_STARTFILE_PREFIX_2 ""
+
+/* Use "/include" instead of "/usr/include".  */
+#undef STANDARD_INCLUDE_DIR
+#define STANDARD_INCLUDE_DIR "/include"
+
+/* We do not provide any "/usr/local/include" directory on SPU.  */
+#undef LOCAL_INCLUDE_DIR
 
 /* Provide a STARTFILE_SPEC appropriate for GNU/Linux.  Here we add
    the GNU/Linux magical crtbegin.o file (see crtstuff.c) which

gcc/config/spu/t-spu-elf

@@ -14,6 +14,9 @@
 #  along with GCC; see the file COPYING3.  If not see
 #  <http://www.gnu.org/licenses/>.
 
+# Define system directory to match STANDARD_INCLUDE_DIR in spu-elf.h,
+# allowing combined SPU/PPU sysroot builds.
+NATIVE_SYSTEM_HEADER_DIR = /include
 
 # Suppress building libgcc1.a
 LIBGCC1 =