New: libabseil-cpp: not building for raspberry pi

https://bugs.busybox.net/show_bug.cgi?id=13356

Bug ID: 13356
Summary: libabseil-cpp: not building for raspberry pi
Product: buildroot
Version: 2020.11
Hardware: All
OS: Linux
Status: NEW
Severity: normal
Priority: P5
Component: Other
Assignee: unassigned at buildroot.uclibc.org
Reporter: buildroot at heine.tech
CC: buildroot at uclibc.org
Target Milestone: ---

I just stumbled across this but currently don't have the time to investigate further.

libabseil-cpp fails to compile for raspberry pi targets with the following error:

In file included from /build/build/build/libabseil-cpp-20200923.2/absl/random/internal/randen_hwaes.cc:229:
/build/build/host/opt/ext-toolchain/lib/gcc/arm-none-linux-gnueabihf/9.2.1/include/arm_neon.h:
In function 'Vector128 {anonymous}::AesRound(const Vector128&, const
Vector128&)':
/build/build/host/opt/ext-toolchain/lib/gcc/arm-none-linux-gnueabihf/9.2.1/include/arm_neon.h:16925:1:
error: inlining failed in call to always_inline 'uint8x16_t
vaesmcq_u8(uint8x16_t)': target specific option mismatch
16925 | vaesmcq_u8 (uint8x16_t __data)

      | ^~~~~~~~~~
/build/build/build/libabseil-cpp-20200923.2/absl/random/internal/randen_hwaes.cc:255:20:
note: called from here
  255 |   return vaesmcq_u8(vaeseq_u8(state, uint8x16_t{})) ^ round_key;
      |          ~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

In file included from /build/build/build/libabseil-cpp-20200923.2/absl/random/internal/randen_hwaes.cc:229:
/build/build/host/opt/ext-toolchain/lib/gcc/arm-none-linux-gnueabihf/9.2.1/include/arm_neon.h:16911:1:
error: inlining failed in call to always_inline 'uint8x16_t
vaeseq_u8(uint8x16_t, uint8x16_t)': target specific option mismatch
16911 | vaeseq_u8 (uint8x16_t __data, uint8x16_t __key)

      | ^~~~~~~~~
/build/build/build/libabseil-cpp-20200923.2/absl/random/internal/randen_hwaes.cc:255:20:
note: called from here
  255 |   return vaesmcq_u8(vaeseq_u8(state, uint8x16_t{})) ^ round_key;
      |          ~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

make[4]: *** [absl/random/CMakeFiles/random_internal_randen_hwaes_impl.dir/build.make:63:
absl/random/CMakeFiles/random_internal_randen_hwaes_impl.dir/internal/randen_hwaes.cc.o] Error 1
make[3]: *** [CMakeFiles/Makefile2:2115:
absl/random/CMakeFiles/random_internal_randen_hwaes_impl.dir/all] Error 2 make[3]: *** Waiting for unfinished jobs....

It is already reported upstream at
https://github.com/abseil/abseil-cpp/issues/662 (on comment points out it is also not compiling for arm/rpi3)

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https://bugs.busybox.net/show_bug.cgi?id=13356

--- Comment #1 from Peter Seiderer <[email protected]> --- Created attachment 8696
--> https://bugs.busybox.net/attachment.cgi?id=8696&action=edit
HACK: package/libabseil-cpp: disable hardware accelaration on arm

Add patch/hack to disable hardware acceleration for libabseil-cpp unconditionaly in case compiled for arm target.

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https://bugs.busybox.net/show_bug.cgi?id=13356

--- Comment #2 from Peter Seiderer <[email protected]> ---
Until a proper (upstream?) fix you can use the attached patch/hack to disable hardware acceleration for random handling unconditionally in case compiled for arm target...

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https://bugs.busybox.net/show_bug.cgi?id=13356

Michael Nosthoff <[email protected]> changed:

What |Removed |Added
----------------------------------------------------------------------------

             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #3 from Michael Nosthoff <[email protected]> --- the github issued set this to resolved since 20211102. See
https://github.com/abseil/abseil-cpp/issues/662

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