Illumos/gate 685c1a2 — usr/src/head/iso math_c99.h, usr/src/lib/libm/common/C jn.c tanh.c
11175 libm should use signbit() correctly 11188 c99 math macros should return strictly backward compatible values Reviewed by: Andy Fiddaman <andy at omniosce.org> Reviewed by: Igor Kozhukhov <igor at dilos.org> Approved by: Dan McDonald <danmcd at joyent.com>