Intel-C: declare support for gnu11
Without extensions, functions like strdup
are not available since they
are actually controlled by feature flags such as _SVID_SOURCE and
_BSD_SOURCE. When using -std=c11
on Intel, none of these flags are
set, so the functions are not declared properly leading to compile
errors.
Reported-by: Adam J. Stewart ajstewart426@gmail.com Closes: #16226 (closed)