Re: cross-toolchain for x86 fails to compile

[Adhemerval Zanella <adhemerval.zanella@linaro.org>]

On 07/02/2022 12:16, Waldemar Brodkorb wrote:
> Hi,
> Adhemerval Zanella wrote,
> 
>>
>>
>> On 04/02/2022 21:35, Waldemar Brodkorb wrote:
>>> Hi,
>>>
>>> I am doing my regular update in OpenADK and updated to glibc 2.35.
>>> All toolchains are build fine except x86.
>>>
>>> I am getting following error with binutils 2.37 and gcc 11.2:
>>> /home/wbx/embedded-test/openadk/toolchain_qemu-x86_glibc/usr/bin/i686-openadk-linux-gnu-gcc
>>> -o
>>> /home/wbx/embedded-test/openadk/toolchain_build_qemu-x86_glibc/w-glibc-2.35-1/glibc-2.35-final/support/test-run-command
>>> -nostdlib -nostartfiles -static -static-pie
>>> /home/wbx/embedded-test/openadk/toolchain_build_qemu-x86_glibc/w-glibc-2.35-1/glibc-2.35-final/csu/rcrt1.o
>>> /home/wbx/embedded-test/openadk/toolchain_build_qemu-x86_glibc/w-glibc-2.35-1/glibc-2.35-final/csu/crti.o
>>> `/home/wbx/embedded-test/openadk/toolchain_qemu-x86_glibc/usr/bin/i686-openadk-linux-gnu-gcc
>>> --print-file-name=crtbeginS.o`
>>> /home/wbx/embedded-test/openadk/toolchain_build_qemu-x86_glibc/w-glibc-2.35-1/glibc-2.35-final/support/test-run-command.o
>>> /home/wbx/embedded-test/openadk/toolchain_build_qemu-x86_glibc/w-glibc-2.35-1/glibc-2.35-final/elf/static-stubs.o
>>> /home/wbx/embedded-test/openadk/toolchain_build_qemu-x86_glibc/w-glibc-2.35-1/glibc-2.35-final/support/libsupport_nonshared.a
>>> -Wl,--start-group
>>> /home/wbx/embedded-test/openadk/toolchain_build_qemu-x86_glibc/w-glibc-2.35-1/glibc-2.35-final/libc.a
>>> -lgcc  -Wl,--end-group
>>> `/home/wbx/embedded-test/openadk/toolchain_qemu-x86_glibc/usr/bin/i686-openadk-linux-gnu-gcc
>>> --print-file-name=crtendS.o`
>>> /home/wbx/embedded-test/openadk/toolchain_build_qemu-x86_glibc/w-glibc-2.35-1/glibc-2.35-final/csu/crtn.o
>>> /home/wbx/embedded-test/openadk/toolchain_qemu-x86_glibc/usr/lib/gcc/i686-openadk-linux-gnu/11.2.0/../../../../i686-openadk-linux-gnu/bin/ld:
>>> /home/wbx/embedded-test/openadk/toolchain_build_qemu-x86_glibc/w-glibc-2.35-1/glibc-2.35-final/libc.a(setlocale.o):
>>> relocation R_386_GOT32 against absolute symbol
>>> `_nl_current_LC_CTYPE_used' in section `__libc_freeres_fn' is
>>> disallowed
>>> collect2: error: ld returned 1 exit status
>>> gmake[8]: *** [../Rules:293:
>>> /home/wbx/embedded-test/openadk/toolchain_build_qemu-x86_glibc/w-glibc-2.35-1/glibc-2.35-final/support/test-run-command]
>>> Error 1
>>> gmake[7]: *** [Makefile:483: support/others] Error 2
>>> gmake[6]: *** [Makefile:9: all] Error 2
>>> gmake[5]: *** [Makefile:62:
>>> /home/wbx/embedded-test/openadk/toolchain_build_qemu-x86_glibc/w-glibc-2.35-1/glibc-2.35/.compiled]
>>> Error 2
>>> gmake[4]: *** [Makefile:106: glibc-compile] Error 2
>>> gmake[3]: *** [mk/build.mk:228: toolchain/final] Error 2
>>> gmake[2]: *** [/home/wbx/embedded-test/openadk/mk/build.mk:177:
>>> world] Error 2
>>> gmake[1]: *** [Makefile.adk:25: all] Error 2
>>> make: *** [Makefile:22: all] Error 2
>>> build failed
>>>
>>> Is it a known bug in binutils or glibc?
>>
>> None we are aware of and we do build check on i686 constantly.  I just did a build
>> with gcc 11.2 and binutins 2.37 and I haven't see any issue.  How did you build
>> gcc and binutils?
> 
> Thanks for your response. It seems TARGET CFLAGS are not allowed to
> be -Os or any machine specific optimizations for x86. Forcing -O2
> did work.

I should work in fact, we have tracked multiple issues when building with -Os
over the releases [1][2][3][4][5][6][7][8].

The problem seems to the that now static-pie is enabled as default and it 
seems to be triggering this issue (with --disable-static-pie it does seem 
to work).

The localedef.o is built with -fpie, as expected, so I am not sure if the
issue is compiler that is emitting wrong relocations for -Os or binutils
that is not expecting it.  With -O2 gcc emits R_386_GOT32X which seems to
be fine.

H.J or Siddhesh, could you check on this?

[1] https://sourceware.org/bugzilla/show_bug.cgi?id=15105
[2] https://sourceware.org/bugzilla/show_bug.cgi?id=19463
[3] https://sourceware.org/bugzilla/show_bug.cgi?id=25240
[4] https://sourceware.org/bugzilla/show_bug.cgi?id=22581
[5] https://sourceware.org/bugzilla/show_bug.cgi?id=20729
[6] https://sourceware.org/bugzilla/show_bug.cgi?id=19462
[7] https://sourceware.org/bugzilla/show_bug.cgi?id=19465
[8] https://sourceware.org/bugzilla/show_bug.cgi?id=19466