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newlib: don't use __visibility__ attrribute on Cygwin 

gcc doesn't support visibility attribute on PE/COFF platforms

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
This commit is contained in:
Corinna Vinschen 2018-08-08 10:44:38 +02:00
parent 6f485ba026
commit 054ff18f5f
1 changed files with 7 additions and 2 deletions
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9
newlib/libm/common/math_config.h
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@ -235,17 +235,22 @@ eval_as_double (double x)
}
#ifdef __GNUC__
# define HIDDEN __attribute__ ((__visibility__ ("hidden")))
# define NOINLINE __attribute__ ((noinline))
# define likely(x) __builtin_expect (!!(x), 1)
# define unlikely(x) __builtin_expect (x, 0)
#else
# define HIDDEN
# define NOINLINE
# define likely(x) (x)
# define unlikely(x) (x)
#endif
/* gcc emitting PE/COFF doesn't support visibility */
#if defined (__GNUC__) && !defined (__CYGWIN__)
# define HIDDEN __attribute__ ((__visibility__ ("hidden")))
#else
# define HIDDEN
#endif
/* Error handling tail calls for special cases, with a sign argument.
The sign of the return value is set if the argument is non-zero. */