Jörg Thalheim 76486f7643 fix c++17 check ...

https://github.com/NixOS/patchelf/issues/393

Appearantly there are compilers that support -std=c++17 but do not
really support c++17.

(cherry picked from commit 9921136529)

2025-08-12 18:38:06 -04:00

..

ax_cxx_compile_stdcxx.m4

Backport infra improvements from master to 0.15

2025-08-12 14:54:44 -04:00