Paul Eggert wrote:
> as you mentioned we should use the
> --std=gnu23 option anyway. I installed the attached to do that.
Thanks. Both patches work fine. Now the gcc option is found and activated:
checking for /gnu-inst-gcc/15-20241113/bin/gcc -ftrapv option to enable C23
features... -std=gnu23
IMO they are ready to sync back into Autoconf's c.m4.
In the config.log I still see a warning:
conftest.c:74:21: warning: 'null_pointer' defined but not used
[-Wunused-const-variable=]
74 | constexpr nullptr_t null_pointer = nullptr;
| ^~~~~~~~~~~~
Maybe you want to silence that as well, just in case someone is using -Werror?
Bruno
