Re: [developer] Recent GCC improvements

[Alan Coopersmith <alan.coopersmith@oracle.com>]

On 5/22/24 04:56, Jonathan Perkin wrote:
> Hi,
> 
> Rich encouraged me to ping the list about a couple of GCC fixes I've recently 
> worked on.  I'm reasonably confident that they would be useful for other 
> distributions to pick up, and perhaps eventually make their way upstream.
> 
> First, this fix for __STDC_VERSION__ being defined in C++ code:
> 
>    https://github.com/jperkin/notes/blob/main/gcc-cpp-stdc/README.md
> 
> This fixes at least one third-party package (scipy), and probably others that 
> depend on cython.  I also have memories of fixing this manually in third party 
> code in the past, so it's likely some other upstream issues are being masked.

The upstream g++ bug explaining why this was necessary is:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=57025

Since gcc has now dropped support for Solaris 11.3 & older [1],
and illumos removed the offending bit of sys/feature_tests.h 6 years ago [2],
perhaps you could suggest that the definition can be dropped now for gcc 15.

[1] https://gcc.gnu.org/pipermail/libstdc++/2024-May/058672.html
[2] 
https://github.com/illumos/illumos-gate/commit/be4355ddcfa407e2d3e4a06973af5cbef6ccdbae

	-alan-