Using -flto-partition=1to1 or -flto-partition=none generally works around these issues. I typically use 1to1 when using lto for anything since I can rarely even get gcc to bootstrap correctly with lto without it.
On Thu, May 21, 2015 at 8:09 AM, lh_mouse <lh_mo...@126.com> wrote: > FWIW, you can try moving virtual function definitions out of header files, as > defining virtual functions inside headers is generally a bad idea. > > (The story is much longer than that. Since the RTTI data of a polymorphic > class is linked/exported/whatever with one of its virtual functions, specific > mechanisms that rely on RTTI - dynamic_cast, exceptions, etc - might fail if > RTTI of the same class is used across dynami clibrary boundaries.) > > ------------------ > Best regards, > lh_mouse > 2015-05-21 > > ------------------------------------------------------------- > 发件人：Etienne Sandré-Chardonnal <etienne.san...@m4x.org> > 发送日期：2015-05-21 19:40 > 收件人：mingw-w64-public > 抄送： > 主题：Re: [Mingw-w64-public] Multiple definition issue with -flto, > MinGW-w64 4.9.1 > > This was a mistake from my last post. The -flto was passed to the linker, > and I get this error. > > You didn't specify -flto in your linker command line. Add that and try again. >> >> > > > ------------------------------------------------------------------------------ > One dashboard for servers and applications across Physical-Virtual-Cloud > Widest out-of-the-box monitoring support with 50+ applications > Performance metrics, stats and reports that give you Actionable Insights > Deep dive visibility with transaction tracing using APM Insight. > http://ad.doubleclick.net/ddm/clk/290420510;117567292;y > _______________________________________________ > Mingw-w64-public mailing list > Mingw-w64-public@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/mingw-w64-public ------------------------------------------------------------------------------ One dashboard for servers and applications across Physical-Virtual-Cloud Widest out-of-the-box monitoring support with 50+ applications Performance metrics, stats and reports that give you Actionable Insights Deep dive visibility with transaction tracing using APM Insight. http://ad.doubleclick.net/ddm/clk/290420510;117567292;y _______________________________________________ Mingw-w64-public mailing list Mingw-w64-public@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mingw-w64-public
