msvcrt: Don't depend on the system's implementation of acos () & asin().
dank at kegel.com
Fri Aug 29 08:57:41 CDT 2008
> glibc implements acos() as the FPU equivalent of atan2(sqrt(1 - x ^ 2), x).
I just looked, and there are several implementations of acos
in glibc, and they all seem to very carefully choose
how to do it based on how close x is to 1.
> This should be fixed on the glibc side as well
Indeed. Have you filed a bug report against glibc yet?
I didn't see one at http://sourceware.org/bugzilla/
Please be sure to attach a simple C program that
reproduces the problem, or better yet, a patch
to add a test case to their test suite.
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