Priyanshu Shah created a merge request: 
https://gitlab.rtems.org/rtems/tools/rtems-source-builder/-/merge_requests/165

Project:Branches: pvshah/rtems-source-builder:gmp-gcc14-compatibility-fix to 
rtems/tools/rtems-source-builder:main
Author:   Priyanshu Shah




## Summary

config/gmp: Add GCC 14+ compatibility warning

GCC 14 and later default to C23 standard, which causes compilation
failures with GMP due to incompatible implicit function declarations.
This change adds a warning in the build log when GCC 14+ is detected,
informing users about the compatibility issue and suggesting to use
GCC 12 or 13 instead.

The warning appears in the build log rather than terminal output to
maintain clean terminal output while providing helpful diagnostic
information in error reports.

Fixes build failures with GCC 14+ when building RTEMS toolchains.


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https://gitlab.rtems.org/rtems/tools/rtems-source-builder/-/merge_requests/165
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