Ben Boeckel cc223e1eed 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
2016-08-02 11:42:45 -04:00
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