On Tue, 12 Nov 2019, 05:57 Stefano Stabellini, <sstabell...@kernel.org>
wrote:
> On Wed, 6 Nov 2019, Andrii Anisov wrote:
> > From: Andrii Anisov <andrii_ani...@epam.com>
> >
> > ARM Compiler 6 has a proven bug: it compiles data only C files with
> > SoftVFP attributes. This leads to a failed linkage afterwards with
> > an error:
> >
> > Error: L6242E: Cannot link object built_in.o as its attributes are
> incompatible with the image attributes.
> > ... A64 clashes with SoftVFP.
> >
> > The known workaround is introducing some code into the affected file,
> > e.g. an empty (non-static) function is enough.
>
> Oh man, this is truly horrible.
>
> If we really have to do this please:
>
> - use the same dummy function name in all files
> - the function should be static
> - hiding the function within a #ifdef ARMCC block
> - potentially hide the whole horrible hack behind a #define so that it
> would become at the call site:
>
> +ARMCC_DUMMY_FUNC_HACK()
The risk here is we may introduce new file in the future possibly in common
code with similar issues. So I would prefer if we can find an automatic way
to do this. Some ideas:
- Add the function at compile time (via makefile). This would be done
for all the files but that's should not be a major issues.
- Force disable softfvp either via command line, new line in the code
or rewriting the attribute of the object.
But before spending time trying to workaround a buggy compiler. What's the
plan with it? Is it going to be used in production or just a demo?
Cheers,
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