Public bug reported: Attempting to cross-build eglibc for arm64 gives this:
(exec 3>&1; exit `( ( ( cd build-tree/arm64-libc && CC="aarch64-linux-gnu-gcc-4.7" CXX="aarch64-linux-gnu-g++-4.7" AUTOCONF=false MAKEINFO=: /home/wookey/linaro/armv8/toolchain/raringnew/eglibc-2.17/configure --host=aarch64-linux-gnu --build=$configure_build --prefix=/usr --without-cvs --enable-add-ons=libidn,"ports nptl " --enable-profile --without-selinux --enable-stackguard-randomization --enable-obsolete-rpc --with-pkgversion="Ubuntu EGLIBC 2.17-0ubuntu2" --with-bugurl="https://bugs.launchpad.net/ubuntu/+source/eglibc/+bugs" --with-headers=/home/wookey/linaro/armv8/toolchain/raringnew/eglibc-2.17/debian/include --enable-kernel=2.6.32 --with-selinux --enable-multi-arch --disable-profile ) 2>&1 3>&-; echo $? >&4) | tee -a build-tree/log-build-aarch64-linux-gnu-libc >&3) 4>&1`) Build started: Wed, 06 Feb 2013 14:38:06 +0000 --------------- configure: loading site script /etc/dpkg-cross/cross-config.arm64 Reading Cross Config Cache (/etc/dpkg-cross/cross-config.arm64) Reading /etc/dpkg-cross/cross-config.cache checking build system type... x86_64-pc-linux-gnu checking host system type... aarch64-unknown-linux-gnu checking for aarch64-linux-gnu-gcc... aarch64-linux-gnu-gcc-4.7 checking for suffix of object files... o checking whether we are using the GNU C compiler... yes checking whether aarch64-linux-gnu-gcc-4.7 accepts -g... yes checking for aarch64-linux-gnu-gcc-4.7 option to accept ISO C89... none needed checking for gcc... gcc checking how to run the C preprocessor... aarch64-linux-gnu-gcc-4.7 -E checking whether we are using the GNU C++ compiler... yes checking whether aarch64-linux-gnu-g++-4.7 accepts -g... yes checking for aarch64-linux-gnu-readelf... aarch64-linux-gnu-readelf checking for sysdeps preconfigure fragments... x86_64 configure: running configure fragment for add-on libidn checking add-on ports for preconfigure fragments... aarch64 alpha am33 arm hppa ia64 m68k mips powerpc tile configure: running configure fragment for add-on nptl checking for assembler and linker STT_GNU_IFUNC support... no checking whether .text pseudo-op must be used... yes configure: error: --enable-multi-arch support requires assembler and linker support make: *** [/home/wookey/linaro/armv8/toolchain/raringnew/eglibc-2.17/stamp-dir/configure_libc] Error 1 dpkg-buildpackage: error: debian/rules build-arch gave error exit status 2 config.log says: configure:4220: checking for assembler and linker STT_GNU_IFUNC support There are no relocations in this file. configure:4251: result: no configure:4254: checking whether .text pseudo-op must be used configure:4264: aarch64-linux-gnu-gcc-4.7 -c conftest.s 1>&5 configure:4267: $? = 0 configure:4278: result: yes configure:4284: error: --enable-multi-arch support requires assembler and linker support So this is checking for GNU IFUNC support, (result in $libc_cv_ld_gnu_indirect_function) We don't have ifunc support in arm64 so this test is correctly failing. The question is why should multiarch support be dependent on IFUNC (A mechanism for choosing at elf load time which of two different functions to run, depending on machine capabilities. This has nothing obviously to do with multiarch paths. It seems to come from this change: http://sourceware-org.1504.n7.nabble.com/PATCH-roland-configure-multiarch-Fix-multiarch-handling-in-sysdeps-generation-td218888.html This makes no sense to me. Multiarch worked just fine in eglibc 2.16 for arm64 so it must be possible to make it work in 2.17 without needing ifunc. But I really don't understand what's going on here. Is this some other 'multi-arch' from the Debian one? crossbuild-essential-arm64 is uninstallable in raring until this is fixed because the build-arch libc has already moved on. ** Affects: eglibc (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1117602 Title: eglibc does not crossbuild for arm64 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/eglibc/+bug/1117602/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs