[Cfp-interest 2085] Freestanding with FP binding

[Rajan Bhakta]

Looking at the specification, I think the only thing that really works is
to do something like the following:
1) Say for freestanding that error conditions do not necessarily have to be
handled (including setting errno). This would have the new side effect of
not requiring using exceptions as well.
or
2) Change the strtod family of functions to allow exceptions to be used for
error reporting instead of just errno. This would be a change to the
general C standard, but likely more palatable.

With regards to the whitespace and decimal point scanning, as long as we
allow a freestanding implementation to have just the C locale (as it is
now) and a single fixed code page, I think it would work for freestanding.
The issues described in WG14 19444 still apply however meaning the code is
not necessarily portable, but this may be something we either accept, or
mandate that the C locale must be used.

Regards,

Rajan Bhakta
z/OS XL C/C++ Compiler Technical Architect
ISO C Standards Representative (Canada, USA), PL22.11 Chair
C/C++ Compiler Development
rbhakta at us.ibm.com

IBM
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