https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62077
--- Comment #15 from Sven C. Dack <sven.c.dack at virginmedia dot com> --- (In reply to Venkataramanan from comment #14) > ... > I tried addding to stage2/3 the flags "-flto=1 -flto-partition=none" instead > of jobserver in bootstrap-lto.mk and spawned bootstrap LTO build in one > amd64 machine. But still getting compare errors with GCC 4.9 branch. The > HEAD is at revision 213070. I have noticed a typo in one of my build scripts later this morning and am now trying to verify the result. It is still not done yet. If it is indeed wrong then I am going to take out the second patch. I am also trying to use a "1to1" partition together with -flto=jobserver and want to see if this makes a difference. This, too, is not done yet. On a different note, I have managed to build a working compiler yesterday using my compare-disassembly script with: --with-build-config=bootstrap-lto --with-boot-ldflags=-fuse-linker-plugin I am still in the process of verifying it and running tests to see if I run into any problems with it, but so far am I excited to have gotten this far. gmp, mpfr and mpc have all been compiled with LTO enabled and have run their testsuits without an error. I have tried pushing it further with "-fipa-pta -fuse-liner-plugin", but ran out of memory (>16GB).