glibc change in header file sysdeps/unix/sysv/linux/bits/socket.h

Bambi535 · 08-17-2008, 06:15 AM

Hi,
I tried to compile cups-1.2.4-11.18.el5_2.1.src.rpm on my Fedora 9 desktop (virtual) machine.
It failed where the code referenced

Code:

struct ucred

. This worked fine when I tried it on my (RIP) Fedora Core 6 machine.
After some research I found that there was a change in

Code:

bits/socket.h

whereby the

Code:

struct ucred

was enveloped in

Code:

#ifdef __USE_GNU

.

Anyone knows what was the reasoning for this change?

Thanks,
Opher.

estabroo · 08-17-2008, 09:57 AM

Most likely because it's a gnu extended structure rather than a posix one. You should be able to add a define of _GNU_SOURCE to make the compile work. If you look at /usr/include/features.h you can see that define will turn on lots good things including __USE_GNU

knudfl · 08-18-2008, 10:10 AM

Reason for change ? May be /usr/share/doc/glibc-2.8/CONFORMANCE
is giving kind of explanation. The question can also be asked here :
http://fcp.surfsite.org/modules/newb...ime=1207792293

If you want to compile "old versions" of software for
EL5, CentOS-5 would work (or Fedora 7 and 8 probably)
I would not expect anything but the latest stable
versions of software to be fixed to compile with
gcc 4.3 and glibc 2.8 .
( Fedora 9 uses 'cups-1.3.7-1.fc9.i386.rpm' and
'cups-libs-1.3.7-1.fc9.i386.rpm' )

Regards

Bambi535 · 08-19-2008, 02:26 PM

Quote:

Originally Posted by estabroo

Most likely because it's a gnu extended structure rather than a posix one. You should be able to add a define of _GNU_SOURCE to make the compile work. If you look at /usr/include/features.h you can see that define will turn on lots good things including __USE_GNU

Thanks for your reply.
I know that __USE_GNU code is activated with -D_GNU_SOURCE. I was actually interested in the why the change took place in glibc.

Thanks.

Bambi535 · 08-19-2008, 02:45 PM

Quote:

Originally Posted by knudfl

Reason for change ? May be /usr/share/doc/glibc-2.8/CONFORMANCE
is giving kind of explanation.

I skimmed through it... did not find it there

.

Quote:

The question can also be asked here :
http://fcp.surfsite.org/modules/newb...ime=1207792293

That I'll do

.

Thanks for the reply.