libm: Control errno support with _IEEE_LIBM configuration parameter
This removes the run-time configuration of errno support present in portions of the math library and unifies all of the compile-time errno configuration under a single parameter so that the whole library is consistent. The run-time support provided by _LIB_VERSION is no longer present in the public API, although it is still used internally to disable errno setting in some functions. Now that it is a constant, the compiler should remove that code when errno is not supported. This removes s_lib_ver.c as _LIB_VERSION is no longer variable. Signed-off-by: Keith Packard <keithp@keithp.com>
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committed by
Corinna Vinschen
parent
e108d04432
commit
c3ce8405c1
@ -612,22 +612,6 @@ extern int *__signgam (void);
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#define M_LOG2_E _M_LN2
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#define M_INVLN2 1.4426950408889633870E0 /* 1 / log(2) */
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/* Global control over fdlibm error handling. */
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enum __fdlibm_version
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{
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__fdlibm_ieee = -1,
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__fdlibm_posix
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};
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#define _LIB_VERSION_TYPE enum __fdlibm_version
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#define _LIB_VERSION __fdlib_version
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extern __IMPORT _LIB_VERSION_TYPE _LIB_VERSION;
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#define _IEEE_ __fdlibm_ieee
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#define _POSIX_ __fdlibm_posix
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#endif /* __BSD_VISIBLE */
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_END_STD_C
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