Date: Sun, 17 Nov 2013 15:54:54 -0600 From: Bobby Bingham <koorogi@...rogi.info> To: musl@...ts.openwall.com Subject: math_errhandling definition I think the definition of math_errhandling is wrong on a couple architectures. C99 (7.12) says: If the expression math_errhandling & MATH_ERREXCEPT can be nonzero, the implementation shall define the macros FE_DIVBYZERO, FE_INVALID, and FE_OVERFLOW in <fenv.h>. math.h always defines math_errhandling as 2 (MATH_ERREXCEPT), but whether those FE_* macros are defined or not is architecture-dependent. In particular, ARM only defines them if __ARM_PCS_VFP is defined, and microblaze does not define them. It looks like if the architecture doesn't support floating point exceptions, math_errhandling must be MATH_ERRNO. This in turn requires that the various math functions set errno appropriately, which it doesn't look like musl's do. -- Bobby Bingham Download attachment "signature.asc" of type "application/pgp-signature" (837 bytes)
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