Re: [PATCH] gitlab-ci/custom-runners: Disable -static-pie for ubuntu-20.04-aarch64

[Alex Bennée]

Richard Henderson <richard.henderson@linaro.org> writes:

> The project has reached the magic size at which we see
>
> /usr/aarch64-linux-gnu/lib/libc.a(init-first.o): in function 
> `__libc_init_first':
> (.text+0x10): relocation truncated to fit: R_AARCH64_LD64_GOTPAGE_LO15 
> against \
> symbol `__environ' defined in .bss section in 
> /usr/aarch64-linux-gnu/lib/libc.a(environ.o)
> /usr/bin/ld: (.text+0x10): warning: too many GOT entries for -fpic, please 
> recompile with -fPIC
>
> The bug has been reported upstream, but in the meantime there is
> nothing we can do except build a non-pie executable.
>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
>
> Irritatingly, once this is fixed, we're still in a broken state because
> we're now picking up an x86_64 cross-compiler, without all of the
> required static libraries:
>
>   https://gitlab.com/qemu-project/qemu/-/jobs/2923714301#L3028
>
>     Cross compilers
>     aarch64                      : cc
>     arm                          : arm-linux-gnueabihf-gcc
>     i386                         : i686-linux-gnu-gcc
>     mips64el                     : mips64el-linux-gnuabi64-gcc
>     mipsel                       : mipsel-linux-gnu-gcc
>     riscv64                      : riscv64-linux-gnu-gcc
>     s390x                        : s390x-linux-gnu-gcc
>     x86_64                       : x86_64-linux-gnu-gcc
>
> where we hadn't done so just 4 days ago:
>
>   https://gitlab.com/qemu-project/qemu/-/jobs/2908305198
>
>     Cross compilers
>     aarch64                      : cc
>     arm                          : arm-linux-gnueabihf-gcc
>     i386                         : i686-linux-gnu-gcc
>     riscv64                      : riscv64-linux-gnu-gcc
>     s390x                        : s390x-linux-gnu-gcc
>
> Alex? I think you're the only one who would know how this host
> is supposed to be configured for gitlab...

Ahh because aarch64.ci.qemu.org is also a developer box I had enabled a
bunch of additional cross compilers for the tests (because we can't take
full advantage of the docker images on non-x86). However it shouldn't
affect the main build, these compilers are only used for the TCG tests.

It looks like the compiler is borked because:

/usr/lib/gcc-cross/x86_64-linux-gnu/11/../../../../x86_64-linux-gnu/bin/ld: 
cannot find /usr/lib/x86_64-linux-gnu/libm-2.35.a: No such file or directory    
                 
/usr/lib/gcc-cross/x86_64-linux-gnu/11/../../../../x86_64-linux-gnu/bin/ld: 
cannot find /usr/lib/x86_64-linux-gnu/libmvec.a: No such file or directory      
 

but the libc6-dev-amd64-cross package puts this in:

  /usr/x86_64-linux-gnu/lib/libmvec.a

Anyway as x86_64 is the one compiler that is available in the docker
multiarch I've dropped that for now. It won't get used by the CI system
as it can't use docker but developers using the box should get:

  Cross compilers
    aarch64                      : cc
    arm                          : arm-linux-gnueabihf-gcc
    i386                         : i686-linux-gnu-gcc
    mips64el                     : mips64el-linux-gnuabi64-gcc
    mipsel                       : mipsel-linux-gnu-gcc
    riscv64                      : riscv64-linux-gnu-gcc
    s390x                        : s390x-linux-gnu-gcc
    x86_64                       : $(DOCKER_SCRIPT) cc --cc 
x86_64-linux-gnu-gcc -i qemu/debian-amd64-cross -s /home/alex/lsrc/qemu.git --

> I guess I'm not going to let this affect the release, but we
> do have quite a number of annoyingly consistent failures now.
> We should either fix them or disable them.

The rest of the tests build and run fine now.

>
>
> r~
>
> ---
>  .gitlab-ci.d/custom-runners/ubuntu-20.04-aarch64.yml | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/.gitlab-ci.d/custom-runners/ubuntu-20.04-aarch64.yml 
> b/.gitlab-ci.d/custom-runners/ubuntu-20.04-aarch64.yml
> index 3d878914e7..85a234801a 100644
> --- a/.gitlab-ci.d/custom-runners/ubuntu-20.04-aarch64.yml
> +++ b/.gitlab-ci.d/custom-runners/ubuntu-20.04-aarch64.yml
> @@ -16,7 +16,9 @@ ubuntu-20.04-aarch64-all-linux-static:
>   # --disable-glusterfs is needed because there's no static version of those 
> libs in distro supplied packages
>   - mkdir build
>   - cd build
> - - ../configure --enable-debug --static --disable-system --disable-glusterfs 
> --disable-libssh
> + # Disable -static-pie due to build error with system libc:
> + # https://bugs.launchpad.net/ubuntu/+source/glibc/+bug/1987438
> + - ../configure --enable-debug --static --disable-system --disable-glusterfs 
> --disable-libssh --disable-pie --extra-cflags='-fno-pie -no-pie'
>     || { cat config.log meson-logs/meson-log.txt; exit 1; }
>   - make --output-sync -j`nproc --ignore=40`
>   - make --output-sync -j`nproc --ignore=40` check V=1

I'll update this once the tree is open as you may have noticed the host
is now a 22.04 one (which hopefully means we can enable glusterfs and
libssh now)

-- 
Alex Bennée