[Bug target/25477] builtin functions should use $LDBL128 suffix on darwin when appropriate

["fxcoudert at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #29 from fxcoudert at gcc dot gnu dot org  2008-02-22 11:00 -------
>> but the Fortran front-end apparently doesn't benefit from it:
> 
>  From what I understand, you have to rebuild libgfortran.  Did you do so?

It doesn't need to, the calls are emitted directly by the front-end (otherwise,
we'd be OK, as the library is in C and we do include <math.h>).

(As a sidenote, there is one minor thing for which recompiling libgfortran is
needed, and that's specific functions; I'm not using them here. Specific
functions are Fortran wrappers to math builtins that are compiled into
libgfortran and used when a Fortran intrinsic math function is passed as an
argument to another function.)

> No, only variadic functions like fprintf should be affected by 
> -mmacosx-version-min.

Of course, you're right, I got confused. It works:

$ ./bin/gcc -c s.c -mmacosx-version-min=10.3.9 
$ nm s.o | grep printf
         U _printf$LDBL128
$ ./bin/gcc -c s.c -mmacosx-version-min=10.3.8 
$ nm s.o | grep printf
         U _printf


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25477