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Re: RFA: Add dummy fenv.h to libc/include

Hi Corinna,

After reading the description of the fenv.h header in SUSv3, I think
that providing the header w/o actually providing the functionality
is also a violation of the standard.  The spec for fenv.h contains
wording like:

  "The <fenv.h> header shall define the following constants if and only
  if the implementation supports the floating-point exception by means
  of the floating-point functions [...]"


The bottom line is, wouldn't it be better to add the dummy header only
to the testsuite which needs this file to run specific tests, rather
than creating a dummy file which affects all newlib targets and might
result in spurious run-time failures?

*sigh* Yes you are right. The header does violate the ISO C99 standard. Oh well. I withdraw this patch and I will have to think about what we can do to actually implement the functionality for real.

Cheers
  Nick

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