On Mon, Nov 6, 2017 at 10:38 AM, Matias Fonzo <s...@dragora.org> wrote: > On Mon, 6 Nov 2017 10:30:14 -0800 > Max Filippov <jcmvb...@gmail.com> wrote: > >> Hello, >> >> I'm trying to build a canadian cross compiler with build == >> x86_64-linux, host == xtensa-linux and target == xtensa-linux. I need >> to specify an xtensa-specific flag in CFLAGS that will be applied to >> the host binary. >> >> I put this flag into CFLAGS and CXXFLAGS. The first question: is that >> the right place for it? >> >> The build process tries to build libcpp for the build system and it >> runs x86_64 gcc with that xtensa-specific option. That's where the >> build breaks for me, because the option is not recognized by the >> build gcc. Is it supposed to work? >> >> If CFLAGS/CXXFLAGS is the right place for the option, how can the >> build tell whether it's intended for the build or for the host? > > GCC has $CFLAGS_FOR_BUILD and $CFLAGS_FOR_TARGET.
Right, but as far as I can see CFLAGS_FOR_TARGET are not applied when a binary for the host is built. And CFLAGS_FOR_BUILD are applied when a binary for the build system is built. I don't see what I'd call CFLAGS_FOR_HOST. -- Thanks. -- Max
