glibc-2.3.3-libeh-kludge.patch

linux下编译交叉工具链的工具源码

wget "http://sources.redhat.com/cgi-bin/get-raw-msg?listname=libc-alpha&date=2003-09&msgid=20030911190500.GE12344%40sunsite.ms.mff.cuni.cz"
aka http://sources.redhat.com/ml/libc-alpha/2003-09/msg00104.html

This seems to fix the error
   gcc-3.4.1-glibc-2.3.3/lib/gcc/powerpc-7400-linux-gnu/3.4.1/../../../../powerpc-7400-linux-gnu/bin/ld: cannot find -lgcc_eh
   make[1]: *** [build/powerpc-7400-linux-gnu/gcc-3.4.1-glibc-2.3.3/build-glibc/libc.so] Error 1
but I assume it might cause trouble with nptl
FIXME: once we figure out why this patch is wrong, fix it right :-)

Date: Thu, 11 Sep 2003 21:05:00 +0200
From: Jakub Jelinek <jakub at redhat dot com>
To: libc-alpha at sources dot redhat dot com
Subject: Re: Another ugly bootstrapping patch for libgcc_eh
Message-ID: <[e-mail]>
Reply-To: Jakub Jelinek <jakub at redhat dot com>
References: <[e-mail]> <[e-mail]> <[e-mail]>
In-Reply-To: <20030911203621 dot GA31503 at nevyn dot them dot org>

On Thu, Sep 11, 2003 at 04:36:21PM -0400, Daniel Jacobowitz wrote:
> > Why exactly do you need that?
> > What exact library needs the functions from libgcc_eh.a?
> > There shouldn't be any these days (__register_*/__frame_state_for etc.
> > functions should come from sysdeps/generic on arches which need them,
> > _Unwind_* come from unwind*.c).
> > IMHO both:
> > 
> > # Force the backward compatibility EH functions to be linked.
> > LDFLAGS-c.so += -u __register_frame
> > 
> > in Makerules and -lgcc_eh in Makeconfig should go.
> 
> If you say so.  That -lgcc_eh's been in and out quite a number of
> times.  I was just assuming that it was necessary.

I have been testing following patch on hammer.
linuxthreads built just fine and NPTL libraries too,
and in both cases libraries had the same exported symbols as without
the patch (though its .text slightly shrunk because it no longer contained
unneeded libgcc_eh routines (and also libc.so has fewer .plt slots).
Unfortunately, sln in NPTL build doesn't link, as libgcc_eh.a is needed
in this case.
So, IMHO we need my Makerules change and Daniel's patch.

2003-09-11  Jakub Jelinek  <[e-mail]>

	#* Makerules (LDFLAGS-c.so): Remove -u __register_frame.
	* Makeconfig (gnulib): Remove -lgcc_eh.

# Ulrich already applied this.
#--- libc/Makerules.jj	2003-07-23 03:56:16.000000000 -0400
#+++ libc/Makerules	2003-09-11 16:22:44.000000000 -0400
#@@ -572,8 +572,6 @@ LDFLAGS-c.so = -nostdlib -nostartfiles
# LDLIBS-c.so += $(gnulib)
# # Give libc.so an entry point and make it directly runnable itself.
# LDFLAGS-c.so += -e __libc_main
#-# Force the backward compatibility EH functions to be linked.
#-LDFLAGS-c.so += -u __register_frame
# # Pre-link the objects of libc_pic.a so that we can locally resolve
# # COMMON symbols before we link against ld.so.  This is because ld.so
# # contains some of libc_pic.a already, which will prevent the COMMONs
--- libc/Makeconfig.jj	2003-07-22 08:25:32.000000000 -0400
+++ libc/Makeconfig	2003-09-11 16:23:08.000000000 -0400
@@ -505,7 +505,7 @@ link-libc-bounded = $(common-objpfx)libc
 link-extra-libs-bounded = $(foreach lib,$(LDLIBS-$(@F:%-bp=%)),$(common-objpfx)$(lib)_b.a)
 
 ifndef gnulib
-gnulib := -lgcc -lgcc_eh
+gnulib := -lgcc
 endif
 ifeq ($(elf),yes)
 +preinit = $(addprefix $(csu-objpfx),crti.o)


	Jakub