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Re:[PATCH] Fix bootstrap on -m32 ppc64 -> ppc64

From: Geoff Keating <geoffk at geoffk dot org>
To: Richard Guenther <rguenther at suse dot de>
Cc: gcc-patches at gcc dot gnu dot org
Date: Thu, 29 Jun 2006 15:00:12 -0400
Subject: Re:[PATCH] Fix bootstrap on -m32 ppc64 -> ppc64

Hi Richard,

Index: Makefile.in
===================================================================
--- Makefile.in	(revision 109534)
+++ Makefile.in	(working copy)
@@ -813,7 +813,11 @@ ALL_CPPFLAGS = $(INCLUDES) $(CPPFLAGS) $

 # Build and host support libraries.
 LIBIBERTY = ../libiberty/libiberty.a
+ifeq ($(CC), $(CC_FOR_BUILD))
+BUILD_LIBIBERTY = $(LIBIBERTY)
+else
 BUILD_LIBIBERTY = $(build_objdir)/libiberty/libiberty.a
+endif

# Dependencies on the intl and portability libraries. LIBDEPS= $(CPPLIB) $(LIBIBERTY) $(LIBINTL_DEP) $(LIBICONV_DEP) $ (LIBDECNUMBER)

I don't see how this patch does what you want to do. If you're on a powerpc32 host and the compiler defaults to -m32, then to target powerpc64 you want to write something like

CC='gcc -m64' .../configure --host=powerpc64-whatever

and so CC will not be equal to CC_FOR_BUILD, since CC_FOR_BUILD will be plain 'cc'.

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