* gnu/packages/commencement.scm (gcc-core-mesboot1): New variable. (gmp-boot, mpfr-boot, mpc-boot): Scheme-only bootstrap. * gnu/packages/patches/gcc-boot-4.6.4.patch: New file. * gnu/packages/patches/gcc-boot-4.7.4.patch: Remove. * gnu/local.mk (dist_patch_DATA): Update.
		
			
				
	
	
		
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			55 lines
		
	
	
	
		
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This patch enables building gcc-4.6.4 using gcc-2.95.3 and glibc-2.2.5
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  * Tweak Makefile to allow overriding NATIVE_SYSTEM_HEADER_DIR using #:makeflags
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  * Add missing limits.h include.
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  * Add SSIZE_MAX define.  The SSIZE_MAX define has been added to Mes
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    upstream and can be removed with the next Mes release.
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  * Remove -fbuilding-libgcc flag, it assumes features being present from a
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    newer gcc or glibc.
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  * [MES_BOOTSTRAP_GCC]: Disable threads harder.
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Upstream status: not presented upstream.
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diff --git a/gcc/Makefile.in b/gcc/Makefile.in
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index f3cc49fdb18..bc5718fc9a6 100644
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--- a/gcc/Makefile.in
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+++ b/gcc/Makefile.in
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@@ -440,7 +440,7 @@ LINKER_PLUGIN_API_H = $(srcdir)/../include/plugin-api.h
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 LTO_SYMTAB_H = $(srcdir)/../include/lto-symtab.h
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 # Default native SYSTEM_HEADER_DIR, to be overridden by targets.
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-NATIVE_SYSTEM_HEADER_DIR = /usr/include
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+# NATIVE_SYSTEM_HEADER_DIR = /usr/include
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 # Default cross SYSTEM_HEADER_DIR, to be overridden by targets.
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 CROSS_SYSTEM_HEADER_DIR = @CROSS_SYSTEM_HEADER_DIR@
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diff --git a/gcc/config/host-linux.c b/gcc/config/host-linux.c
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index 94b7a0b89a7..ab2baab55ca 100644
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--- a/gcc/config/host-linux.c
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+++ b/gcc/config/host-linux.c
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@@ -23,6 +23,12 @@
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 #include "hosthooks.h"
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 #include "hosthooks-def.h"
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+// ../.././gcc/config/host-linux.c:213: `SSIZE_MAX' undeclared (first
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+// use in this function)
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+#include <limits.h>
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+#ifndef	SSIZE_MAX
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+# define SSIZE_MAX	LONG_MAX
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+#endif
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 /* Linux has a feature called exec-shield-randomize that perturbs the
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    address of non-fixed mapped segments by a (relatively) small amount.
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diff --git a/libgcc/generic-morestack-thread.c b/libgcc/generic-morestack-thread.c
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index bbe6dd12b5a..1d1d48223d7 100644
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--- a/libgcc/generic-morestack-thread.c
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+++ b/libgcc/generic-morestack-thread.c
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@@ -34,7 +34,7 @@ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
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    will want to define inhibit_libc while building a compiler which
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    can build glibc.  */
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-#ifndef inhibit_libc
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+#if 0 //!defined (inhibit_libc) && !MES_BOOTSTRAP_GCC
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 #include <errno.h>
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 #include <pthread.h>
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