[Bug target/16109] error: architecture mismatch on "fzero".

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

------- Additional Comments From ebotcazou at gcc dot gnu dot org  2004-07-08 19:28 -------
> If the compiler is configured with --with-cpu=v7, then it defaults to -m32.

This one I've always found strange, but now I see how it works.  It's different
on Solaris, because sol2-64.h unconditionally sets MASK_64BIT in TARGET_DEFAULT.

> #define OPTION_DEFAULT_SPECS \
>   {"cpu", "%{!m64:%{!mcpu=*:-mcpu=%(VALUE)}}" }, \
> ...
> means that -mcpu=v7 will be passed if no -mcpu is given AND -m64 is not
> present on the command line.  If -m64 is present and -mcpu is not given,
> CC1_SPEC will add -mcpu=ultrasparc.
> Similarly for a compiler defaulting to -m64.

Aaaaah!  I should have grasped that when you posted the OPTION_DEFAULT_SPECS
patch for Linux.  We have the "-m64 doesn't shut down -mcpu=v7" problem on
Solaris in 3.4.x (PR target/16416) so I'm going to shamelessly steal your patch.

Thanks for the explanation.


[About the original problem:]
It seems to me that the flags are missing on the line:

  sparc64-pld-linux-gcc ../sysdeps/sparc/sparc64/memset.S [...]


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16109