Re: driver/9822: The "%c" spec option produces: gcc: spec failure: unrecognized spec option 'c'

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

bradley-gnu at bradley dot lcs dot mit dot edu wrote:-

> I tried to write a spec file that used the %c option, but it is no longer accepted by the driver.  The error is printed by line 5234 of gcc.c.

It's been removed as it is not necessary.

> The gcc.info documentation says that %c is accepted, however:
> > `%c'
> >     Process the `signed_char' spec.  This is intended to be used to
> >     tell cpp whether a char is signed.  It typically has the
> >     definition:
> >          %{funsigned-char:-D__CHAR_UNSIGNED__}
> 
> This is probably a documentation bug, rather than a code bug.

I think so.

> The documentation on the spec files seems quite out-of-date.
> For example, I cannot figure out, from the documentation, what does this entry mean in the spec file.
>  %{fsigned-char&unsigned-char}

That's documented in gcc.c.  I'm not sure why SPECS have been
documented, they're really an internal thing in a constant state of
flux.

-fsigned-char or -funsigned-char should be all you need.

Neil.