I have added multilib support to cross-gcc (from cross-gcc_25), and enabled it as the default.
So the existing cross-gcc-*-* builds in the archive (and the emdebian test repo) are all using this. Feedback on whether things actually work as expected would be welcome. It is enabled.disabled by setting DEB_CROSS_MULTILIB=yes/no (defaulting to yes if not mentioned). I've exposed that setting in the debian/rules in the generated cross-gcc-<ver>-<arch> source package so that it is relatively simple to change in a local build. The set of multilibs currently generated is as follows: Debian arch extra multilib ABIs amd64 i386 x32 i386 amd64 x32 mips mips64 mipsn32 mipsel mips64 mipsn32 powerpc ppc64 arm64 - armel - armhf - ppc64el - That's what I inferred matched what gcc native does by peering at a lot of runes but I could easily be wrong. Is that in fact the set we want? The builds currently in the archive are still wdotap/multiarch-build-deps built, but this support should translate almost trivially to standalone -cross packages. Note that DEB_CROSS_MULTILIB=no (equivalent to DEB_CROSS_NO_BIARCH=yes and NOLANG=biarch in gcc) requires gcc patches carried in cross-gcc, because this is no longer supported in gcc itself. At some point we may decide that single-abi builds are no longer worth maintaining and drop these, or (better) get support back into gcc. These patches make cross-gcc somewhat specific to corresponding upstream gcc-source versions. I know exposing a new variable is arguably confusing, but it's so much more obvious what DEB_CROSS_MULTILIB does that I thought it made sense here from a user POV, and there were 2 corresponding knobs in gcc to twiddle so it makes sense programatically too. Limited testing so far found that installation deps all work OK and multilib cross-builds (e.g. zlib, expat) work OK for the build, but shlibdeps breaks (with expat, after appying #775942): http://wookware.org/files/zlib-1.2.8-multilib-crossbuild possibly due to #772184. Which is awaiting a dpkg 1.18 upload to test. Confirmation from someone who understands multilib-world would be welcome. Or indeed any other tests showing that this stuff does/doesn't actually work. Wookey -- Principal hats: Linaro, Debian, Wookware, ARM http://wookware.org/ -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected] Archive: https://lists.debian.org/[email protected]
