I need to figure out whether a given gcc (or other compiler)
version supports C99 complex types ("_Complex float" and such).
The standard says that a compiler providing C99 defines
__STDC_VERSION__ and - if it has no complex type support - defines
__STDC_NO_COMPLEX__ too. So I came up with the following test:
#if !defined __STDC_NO_COMPLEX__ && defined __STDC_VERSION__ && (__STDC_VERSION__ >= 199901L)
/* complex types available
#endif
However, this does not work with a plain gcc call, i.e. gcc does
not define __STDC_VERSION__ (or __STDC__) if not told explicitly
which standard to use, e.g. with --std=c99. What's the proper way
to detect complex type support (preferrably with not just gcc but
any standard conforming compiler)?
Ciao
Dominik ^_^ ^_^
--
Dominik Vogt
IBM Germany
