Re: __STDC_VERSION__ is undefined in gcc-3.x?

[Neil Booth <neil at daikokuya dot demon dot co dot uk>]

Gordon Sadler wrote:-

> 2.95.x no matter which -std=xxx I pass it always returns 199409. Under 3.x,
> unless I specify one of the -std=c9x options or gnu9x __STDC_VERSION__ is 
> undefined. So it appears -ansi (aka -std=c89) should not define
> __STDC_VERSION__? In that case, 2.95.x is wrong?

I believe all of this to be true.  But 2.95 does not use cpplib by
default, and therefore cppinit.c, I believe.  You might need to look
at cccp.c, which could do a different thing (I don't have a copy of it
handy).

> and perhaps the default for
> at least the 3.x-branch should be changed to 'iso9899:199409'?

I think the current behaviour is what we want.  Since C89 compilers do
not define the macro, it is supposed to be a way for programs to check
whether they are being compiled by a C89 compiler or not.

Neil.