I've just blogged the following at
http://jaegerandi.blogspot.de/2012/08/glibc-216-for-opensuse-factory.html and
like to share it here as well.
No action needed from you for now besides reviewing my patches. Fixes
are welcome as well.
The GNU C Library (glibc 2.16) has been released a couple of weeks ago
and is the first release after the changed glibc development model. It
looks like the release with the most bug fixes and most contributors.
The most significant developer visible changes are IMO:
Support for ISO C11
Many bug fixes for the math library thanks to a thorough audit of
all open math library bugs. The results are mor accurate exceptions and
function results.
Support for the x32 ABI on x86-64 which also brings unified
headers for x86 and x86-64 - so there are really the same headers for
all three ABIs on x86-64.
I've packaged glibc 2.16 in the openSUSE Build Service and could reduce
the number of patches we had from 61 to 39 - since many of our patches
were upstreamed during 2.16 development and a few backported from it. I
also classified the patches to mark which ones are upstreamed and which
ones are not appropriate for upstream (yet).
While the focus of openSUSE is on getting 12.2 out of the door, I worked
on getting glibc 2.16 ready for the next release in a side project. The
library itself builds fine and Coolo has setup a staging project called
openSUSE:Factory:Staging:Glibc where the whole distribution is build
with the new glibc (in this case we use 12.2 as a base since that one is
moving slower).
Fixing Packages
I've had to fix a small number of packages to get them building with
glibc 2.16 and pushed everything directly to factory.
The issues I encountered and fixed where:
Missing
The include files have been updated and some programs did not have an
include on and instead include some other file that
included it.
The build failure looks like:
[ 89s] util_exec.cpp: In function 'void dmtcp::Util::adjustRlimitStack()':
[ 89s] util_exec.cpp:374:19: error: aggregate
'dmtcp::Util::adjustRlimitStack()::rlimit rlim' has incomplete type and
cannot be defined
[ 89s] util_exec.cpp:375:15: error: 'RLIMIT_STACK' was not declared in
this scope
[ 89s] util_exec.cpp:375:34: error: 'getrlimit' was not declared in
this scope
[ 89s] util_exec.cpp:376:26: error: 'RLIM_INFINITY' was not declared
in this scope
[ 89s] util_exec.cpp:384:36: error: 'setrlimit' was not declared in
this scope
No declaration anymore for gets
gets is not declared anymore as part of ISO C11 and therefore code using
gets needs to be compiled using older standards - or better do not build
with gets.
The packages that failed where packages using gnulib that issued a
warning when gets was used - and this warning code works only if gets is
declared. Once these packages update their gnulib code, everything is
fine, for now the warning could just be disabled or only enabled when
there is a declaration.
No more 'struct siginfo'
glibc 2.16 removes the undocumented definition of 'struct siginfo'
from . This struct was always a typedef for 'siginfo_t'
which is required by POSIX, so 'siginfo_t' should be used instead.
TIME_UTC from ISO C11 in boost
ISO C11 introduced the constant TIME_UTC - and boost also declares this
value. This breaks building with boost and thus upstream boost now
renamed its value to 'TIME_UTC_' which is an API change.
So, boost and all packages using boost's boost::TIME_UTC needed fixing.
_FORTIFY_SOURCE requires compilation with optimization
Building with -D_FORTIFY_SOURCE is done by default for openSUSE but the
extra features are defined in a way that they only work with
optimization. Now glibc complains if a file is compiled without
optimization but with this feature macro.
There were two packages that contained -O0 for a few files that were
easily fixed.
Next step: Factory
Once all packages are building fine (so far I had to fix 50+ packages,
the other 5000+ are fine), I'll discuss with Coolo when and how to
submit this to Factory.
--
Andreas Jaeger aj@{suse.com,opensuse.org} Twitter/Identica: jaegerandi
SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg, Germany
GF: Jeff Hawn,Jennifer Guild,Felix Imendörffer,HRB16746 (AG Nürnberg)
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