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  • Help with boost1.74

    From Giovanni Mascellani@21:1/5 to All on Tue Nov 9 21:00:01 2021
    Dear Debian ARM people,

    last boost1.74 version (1.74.0-12) fails to build on armhf[1], and I
    suspect the failure is caused by the switch to GCC 11, because it didn't
    happen in the version before (compiled with GCC 10).

    [1] https://buildd.debian.org/status/fetch.php?pkg=boost1.74&arch=armhf&ver=1.74.0-12&stamp=1635842472&raw=0

    The problem seems to be this:
    ---
    jump_arm_aapcs_elf_gas.S: Assembler messages:
    jump_arm_aapcs_elf_gas.S:57: Error: selected processor does not support
    `vstmia sp,{d8-d15}' in ARM mode
    jump_arm_aapcs_elf_gas.S:68: Error: selected processor does not support
    `vldmia sp,{d8-d15}' in ARM mode
    ---

    I have little knowledge of the ARM architecture: why those instructions
    are not valid any more? Or simply they were ignored with GCC 10? They
    are gated by these defines:
    ---
    #if (defined(__VFP_FP__) && !defined(__SOFTFP__))
    @ save S16-S31
    vstmia sp, {d8-d15}
    #endif
    ---

    For reference, the failing file is [2].

    [2] https://sources.debian.org/src/boost1.74/1.74.0-12/libs/context/src/asm/jump_arm_aapcs_elf_gas.S/

    Thanks for your help, Giovanni.

    (please Cc: in replies)
    --
    Giovanni Mascellani <g.mascellani@gmail.com>

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  • From peter green@21:1/5 to Giovanni Mascellani on Tue Nov 9 21:10:01 2021
    On 09/11/2021 19:51, Giovanni Mascellani wrote:
    Dear Debian ARM people,

    last boost1.74 version (1.74.0-12) fails to build on armhf[1], and I suspect the failure is caused by the switch to GCC 11, because it didn't happen in the version before (compiled with GCC 10).

    IIRC the Debian gcc-11 package takes a different approach to specifying default cpu/fpu,
    specifying -march=armv7-a+fp rather than seperate march and mfpu options, I wonder if
    this is having an influence somehow.

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  • From Christian Marillat@21:1/5 to Giovanni Mascellani on Tue Nov 9 21:10:01 2021
    On 09 nov. 2021 20:51, Giovanni Mascellani <gio@debian.org> wrote:

    Dear Debian ARM people,

    last boost1.74 version (1.74.0-12) fails to build on armhf[1], and I
    suspect the failure is caused by the switch to GCC 11, because it
    didn't happen in the version before (compiled with GCC 10).

    [1]
    https://buildd.debian.org/status/fetch.php?pkg=boost1.74&arch=armhf&ver=1.74.0-12&stamp=1635842472&raw=0

    The problem seems to be this:
    ---
    jump_arm_aapcs_elf_gas.S: Assembler messages:
    jump_arm_aapcs_elf_gas.S:57: Error: selected processor does not
    support `vstmia sp,{d8-d15}' in ARM mode
    jump_arm_aapcs_elf_gas.S:68: Error: selected processor does not
    support `vldmia sp,{d8-d15}' in ARM mode
    ---

    Maybe related to bug #996419 ?

    Christian

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