Created attachment 360800 [details, diff] glibc-2.18-make40.patch See upstream bug (URL). Attached patch fixes the problem.
There's now an official fix (see URL).
added to glibc 2.16 & 2.17 http://sources.gentoo.org/gentoo/src/patchsets/glibc/2.16.0/0059_all_glibc-2.19-make-4.0.patch?rev=1.1 http://sources.gentoo.org/gentoo/src/patchsets/glibc/2.17/0059_all_glibc-2.19-make-4.0.patch?rev=1.1 still need to do 2.18
added to glibc-2.18 now http://sources.gentoo.org/gentoo/src/patchsets/glibc/2.18/00_all_0015-Accept-make-versions-4.0-and-greater.patch?rev=1.1
and 2.15 versions?
(In reply to Oleg from comment #4) 2.16 is stable, so we don't care too much about older versions