Created attachment 511172 [details] emerge --info /tmp/.portage/portage/dev-util/valgrind-3.13.0-r1/temp/ccZK1uh7.ltrans0.ltrans.o: In function `vgMemCheck_helperc_LOADV32le': <artificial>:(.text+0x5f): undefined reference to `primary_map' /tmp/.portage/portage/dev-util/valgrind-3.13.0-r1/temp/ccZK1uh7.ltrans0.ltrans.o: In function `vgMemCheck_helperc_LOADV16le': <artificial>:(.text+0x9f): undefined reference to `primary_map' /tmp/.portage/portage/dev-util/valgrind-3.13.0-r1/temp/ccZK1uh7.ltrans0.ltrans.o: In function `vgMemCheck_helperc_LOADV8': <artificial>:(.text+0xf8): undefined reference to `primary_map' /tmp/.portage/portage/dev-util/valgrind-3.13.0-r1/temp/ccZK1uh7.ltrans0.ltrans.o: In function `vgMemCheck_helperc_LOADV64le': <artificial>:(.text+0x41): undefined reference to `mc_LOADVn_slow' /tmp/.portage/portage/dev-util/valgrind-3.13.0-r1/temp/ccZK1uh7.ltrans0.ltrans.o: In function `vgMemCheck_helperc_LOADV32le': <artificial>:(.text+0x89): undefined reference to `mc_LOADVn_slow' /tmp/.portage/portage/dev-util/valgrind-3.13.0-r1/temp/ccZK1uh7.ltrans0.ltrans.o: In function `vgMemCheck_helperc_LOADV16le': <artificial>:(.text+0xe2): undefined reference to `mc_LOADVn_slow' /tmp/.portage/portage/dev-util/valgrind-3.13.0-r1/temp/ccZK1uh7.ltrans0.ltrans.o: In function `vgMemCheck_helperc_LOADV8': <artificial>:(.text+0x13b): undefined reference to `mc_LOADVn_slow' collect2: error: ld returned 1 exit status make[3]: *** [Makefile:1012: memcheck-x86-linux] Error 1 make[3]: *** Waiting for unfinished jobs.... /usr/lib/gcc/x86_64-pc-linux-gnu/6.4.0/../../../../x86_64-pc-linux-gnu/bin/ld: warning: cannot find entry symbol _start; defaulting to 00000000580000f0 /tmp/.portage/portage/dev-util/valgrind-3.13.0-r1/temp/ccyxxLiI.ltrans3.ltrans.o: In function `barf.lto_priv.282': /tmp/.portage/portage/dev-util/valgrind-3.13.0-r1/work/valgrind-3.13.0/memcheck/m_debuginfo/readdwarf3.c:5169: undefined reference to `VG_MINIMAL_LONGJMP'
Created attachment 511174 [details] build.log
Known issue upstream. They recommend not using it for now, but from the bug (https://bugs.kde.org/show_bug.cgi?id=338252), it sounds like they may support it at some point in the future. @blueness, how would you feel about filtering the cflag for now, until it is supported?
Created attachment 554048 [details] lto enabled ebuild @OP, could you try this ebuild please? You'll need USE=lto, of course. Compiles here and works for a couple basic tests, but I'd like someone else to test before I push it.