Created attachment 427624 [details, diff] Patch to use cmath I used the solution found at http://permalink.gmane.org/gmane.linux.lfs.beyond.devel/30650
Thanks for reporting. This is fixed in git now. Please sync. https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=30cab995774241d564efbb4df148c3a636172b9a