[cfe-dev] #ident preprocessor directive is ignored ?

[Jordan Rose]

On Oct 24, 2012, at 7:52 , Douglas Gregor <dgregor at apple.com> wrote:

> 
> On Oct 24, 2012, at 6:47 AM, Xavier Roche <roche+kml2 at exalead.com> wrote:
> 
>> Hi folks!
>> 
>> The #ident preprocessor directive seems to be missing (actually it seems to be /ignored/) - is it a known behavior ?
>> 
>> Ie. the following program:
>> 
>> #ident "$$Description: ident-test $$"
>> int main(void) { return 0; }
>> 
>> Produces a binary without the given RCS string:
>> 
>> $ ident ident-test-clang
>> ident-test-clang:
>> 
>> [ Yes, I admit that the venerable RCS strings are a bit outdated, but there is no other standard way AFAIK to include useful meta-data in libraries, such as version/build information. ]
> 
> Clang parses #ident and then throws the results away. It's never been important enough to anyone to actually pass this information through.

...patches welcome. :-)