[Bug c/50992] abs() and cabs()

[bratsinot at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50992

Alexander <bratsinot at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|Wconversion does not handle |abs() and cabs()
                   |complex type conversions    |

--- Comment #4 from Alexander <bratsinot at gmail dot com> 2011-11-04 15:12:13 UTC ---
(In reply to comment #3)
> #include <complex.h>
> 
> extern int abs(int);
> int foo(void) {
>   complex double Z = 0.1 + 0.2I;
>   return abs(Z);
> }
> 
> GCC says nothing with -Wall -Wextra -Wconversion, because
> c-common.c:conversion_warnings() does not handle complex variables.
> 
> Clang:
> 
> test.c:6:14: warning: implicit conversion discards imaginary component:
> '_Complex double' to 'int' [-Wconversion]
>   return abs(Z);
>          ~~~ ^
> 1 warning generated.

I noticed. So what? Why was this done?