I installed binutils with --enable-gold=default then I configured gcc 4.6-20110520 with the same prefix as the newly installed binutils. config.log shows: configure:13814: checking where to find the target ld configure:13842: result: pre-installed in /home/wakelj/tools/Linux-x86_64/lto/x86_64-unknown-linux-gnu/bin and gcc/config.log shows: configure:21077: checking whether we are using gold configure:21086: result: yes configure:21097: checking what linker to use configure:21122: result: /home/wakelj/tools/Linux-x86_64/lto/x86_64-unknown-linux-gnu/bin/ld So it has found the desired binutils and $ld_is_gold=yes, but: configure:23116: checking linker plugin support configure:23136: result: no This is because I don't have an in-tree ld and "ld --version 2>&1 | fgrep plugin-opt" fails, so $gcc_cv_lto_plugin=no So will this gcc use a linker plugin? It looks like I could get it to by adding --with-plugin-ld=blahblah/ld.bfd but then it uses ld.bfd not gold. The test in gcc/configure on trunk is completely different and seems to do what I expected (setting $gcc_cv_lto_plugin=yes based on the version of ld/gold being used, not on whether grepping for plugin-opt works) If I want to use 4.6+LTO+plugin do I need an in-tree gold, or don't use gold? And if I don't have an in-tree binutils but want gold+LTO+plugin I need to use 4.7? Thanks.
