Bug#261082: glibc: Please add the '-fno-unit-at-a-time' patch from upstream for amd64/gcc-3.4 support

[GOTO Masanori <gotom@debian.or.jp>]

Hi,

At Fri, 23 Jul 2004 17:03:38 +0200,
Andreas Jochens wrote:
> To compile glibc on amd64 (and other architectures) with gcc-3.4,
> the '-fno-unit-at-a-time' patch from upstream is necessary.
> 
> Without this patch, the gcc-3.4 compiler reorders some assembly code and
> the resulting pthread libraries will segfault.
> 
> The attached patch adds a new patch file 'debian/patches/fno-unit-at-a-time'
> and enables that patch by adding it to 'debian/patches/00list'.
> 
> This 'fno-unit-at-a-time' patch (which was taken from upstream cvs) adds a 
> test for the '-fno-unit-at-a-time' compiler switch to 'configure.in' 
> and 'configure', 
> puts a corresponding variable definition to 'config.make.in' and 
> inserts the '$(fno-unit-at-a-time)' variable in various Makefiles.

Cool.  That's ok.

> Additionally, the attached patch adds
> 
> nptl_extra_cflags = -g0 -O3 -fomit-frame-pointer -D__USE_STRING_INLINES
> 
> to 'debian/sysdeps/amd64.mk' which uses '-g0' instead of the default '-g1'.
> This is also necessary to compile glibc with gcc-3.4.

Why is this needed?  Could you teach me the reason?

Regards,
-- gotom