http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40056
--- Comment #7 from Andrew Savchenko <bircoph at gmail dot com> 2012-03-08 15:11:04 UTC --- Ok, thanks for clarification. The problem is that I'm not a developer of this program, I just maintain its package for Gentoo. To make things worse I can't reproduce the build failure myself on any of my hosts. But users continue to complain one after another, so this issue needs to be cleared out. However, I can tell that -fno-implicit-templates was never used during compilation and I can't find any extern template declarations in that code; though code is rather sophisticated, I may missed something tricky.