Re: [gentoo-amd64] Re: Unexpected side effect of GCC 4

[Peter Humphrey <prh@gotadsl.co.uk>]

On Sunday 05 November 2006 11:50, Peter Humphrey wrote:
> On Sunday 05 November 2006 10:12, Duncan wrote:
> > What about linux-headers and glibc?  The new glibc (2.5) has had some
> > very strange interactions here.
>
> Good point. On the firewall I have:
> $ qpkg -v -I glibc
> sys-libs/glibc-2.4-r3
> $ qpkg -v -I linux-headers
> sys-kernel/linux-headers-2.6.17-r1
> $ uname -r
> 2.6.17-gentoo-r8
> $ gcc-config -l
>  [1] i686-pc-linux-gnu-3.4.6 *
>  [2] i686-pc-linux-gnu-3.4.6-hardened
>  [3] i686-pc-linux-gnu-3.4.6-hardenednopie
>  [4] i686-pc-linux-gnu-3.4.6-hardenednopiessp
>  [5] i686-pc-linux-gnu-3.4.6-hardenednossp
>  [6] i686-pc-linux-gnu-4.1.1
>
> and on the workstation I have:
> $ qpkg -v -I glibc
> /glibc-2.5
> $ qpkg -v -I linux-headers
> /linux-headers-2.6.17-r1
> $ uname -r
> 2.6.18-gentoo-r1
> $ gcc-config -l
>  [1] x86_64-pc-linux-gnu-4.1.1 *
> (I don't know what's causing qpkg to drop the first part of the package
> name on the workstation. Is this another pointer to glibc?)

[...]

> The firewall box has been untouched and continues to run with
> glibc-2.4-r3 and linux-headers-2.16.7-r1; that's the box with the rsync
> server. The workstation is the one with all the changes, being in fact a
> new installation from scratch. If I boot the old system, which I think
> has the same versions of glibc and linux-headers as the firewall box
> (I'll try that in a minute and let you know if it's otherwise),

In fact the old workstation system is like this (I'm running it now):
$ qpkg -v -I glibc
/glibc-2.5
$ qpkg -v -I linux-headers
/linux-headers-2.6.17-r1
prh@wstn ~ $ uname -r
2.6.18-gentoo-r1
prh@wstn ~ $ gcc-config -l
 [1] x86_64-pc-linux-gnu-3.4.6 *
 [2] x86_64-pc-linux-gnu-3.4.6-hardened
 [3] x86_64-pc-linux-gnu-3.4.6-hardenednopie
 [4] x86_64-pc-linux-gnu-3.4.6-hardenednopiessp
 [5] x86_64-pc-linux-gnu-3.4.6-hardenednossp
 [6] x86_64-pc-linux-gnu-4.1.1
$ emerge --info | grep FLAGS
CFLAGS="-march=k8 -Os -pipe -frename-registers -fweb -freorder-blocks -freorder-blocks-and-partition -funit-at-a-time -fgcse-sm -fgcse-las -fgcse-after-reload -fmerge-all-constants"
CXXFLAGS="-march=k8 -Os -pipe -frename-registers -fweb -freorder-blocks -funit-at-a-time -fgcse-sm -fgcse-las -fgcse-after-reload -fmerge-all-constants"
Unset:  CTARGET, INSTALL_MASK, LDFLAGS, PORTAGE_RSYNC_EXTRA_OPTS
(Note the partial package name reported by qpkg.)

So I have a pointer away from glibc and linux-headers. CFLAGS on the new 
system are as on the old but with -combine added.The old and new systems 
have the same versions of kernel, linux-headers and glibc, but different 
versions of gcc. Rsync is crippled on the old system but fine on the new 
one.

-- 
Rgds
Peter
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