http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52593
--- Comment #8 from joseph at codesourcery dot com <joseph at codesourcery dot com> 2012-04-29 00:16:38 UTC --- If you have a bug in glibc's libm, please make sure there is an open bug report for it in glibc Bugzilla, component "math"; I don't see anything there about sqrt.