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libm/common: Set WANT_ERRNO based on _IEEE_LIBM value 

_IEEE_LIBM is the configuration value which controls whether the
original libm functions modify errno. Use that in the new math code as
well so that the resulting library is internally consistent.

Signed-off-by: Keith Packard <keithp@keithp.com>
This commit is contained in:
Keith Packard via Newlib 2020-08-03 10:55:03 -07:00 committed by Corinna Vinschen
parent 4f5b52ffe7
commit bb166cfc3e
1 changed files with 3 additions and 1 deletions
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4
newlib/libm/common/math_config.h
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@ -36,7 +36,9 @@
/* Correct special case results in non-nearest rounding modes. */
# define WANT_ROUNDING 1
#endif
#ifndef WANT_ERRNO
#ifdef _IEEE_LIBM
# define WANT_ERRNO 0
#else
/* Set errno according to ISO C with (math_errhandling & MATH_ERRNO) != 0. */
# define WANT_ERRNO 1
#endif