Several Linux distros now build with link time optimizations (-flto=auto) by default. It looks like 15 and newer versions can be built with -flto. I haven't yet checked test results for LTO/non-LTO builds. I also only tried building with GCC 10.
11 still fails with /usr/bin/ld: /tmp/libjvm.so.xGmnnW.ltrans45.ltrans.o: in function `G1CMOopClosure::do_oop(oopDesc**)': /<<BUILDDIR>>/openjdk-lts-11.0.9.1+1/make/hotspot/./src/hotspot/share/gc/g1/g1OopClosures.hpp:176: undefined reference to `void G1CMOopClosure::do_oop_work<oopDesc*>(oopDesc**)' [...] However this might be just the first build failure. Matthias
