On 07/16/2018 05:25 PM, Jonathan Wakely wrote:
On 12/07/18 20:49 +0200, mskal...@redhat.com wrote:
Dan Horák píše v St 11. 07. 2018 v 14:12 +0200:
On Wed, 11 Jul 2018 14:00:40 +0200
mskal...@redhat.com wrote:
> Hi,
> during a discussion with upstream (MongoDB) they asked me about
> default Fedora C/C++ build flags. And I don't remember all Fedora
> System Wide changes where it was introduced,... so is there some
> place where it's described?
https://src.fedoraproject.org/rpms/redhat-rpm-config/blob/master/f/bu
ildflags.md
Thanks. Also does someone have any information how our flags affects
performance?
(which is also important for the upstream project)
Currently -D_GLIBCXX_ASSERTIONS has fairly negative effects on
performance of some code using the C++ standard library. GCC is not
able to optimise away as many of the checks as we initially thought.
Do you know if anything else besides <https://gcc.gnu.org/PR85929>?
That one at least a simple source-level fix (probably fixing a real bug
in some cases): Use size_type/size_t for the index variable.
Thanks,
Florian
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