Created attachment 552490 [details] Failed build with clang/llvm 7 and lto Firefox fails to build with USE="clang lto"
Created attachment 552492 [details] emerge_info.log emerge --info www-client/firefox
Obviously the --disable-elf-hack in mozconfig is still needed for firefox-63.0. Please put it back in.
*** This bug has been marked as a duplicate of bug 669382 ***