[Buildroot] [PATCH v2 0/2] package/{libabseil-cpp, python-grpcio}: disable for the MIPS n32 ABI

From: Yegor Yefremov via buildroot <buildroot@buildroot.org>
To: buildroot@buildroot.org
Cc: James Hilliard <james.hilliard1@gmail.com>
Subject: [Buildroot] [PATCH v2 0/2] package/{libabseil-cpp, python-grpcio}: disable for the MIPS n32 ABI
Date: Thu, 17 Sep 2026 13:37:18 +0200	[thread overview]
Message-ID: <20260917113720.1297345-1-yegorslists@gmail.com> (raw)

From: Yegor Yefremov <yegorslists@googlemail.com>

This is a v2 of "package/python-grpcio: disable for the MIPS n32 ABI":

  https://patchwork.buildroot.org/project/buildroot/patch/20260908093538.2715153-1-yegorslists@gmail.com/

Changes v1 -> v2 (after Thomas' review):

 - Added PATCH 1/2 fixing libabseil-cpp itself, which has exactly the
   same problem. This automatically propagates to grpc, protobuf, re2,
   webrtc-audio-processing, sysdig, falcosecurity-libs, collectd and
   gst1-plugins-bad, which all already depend on
   BR2_PACKAGE_LIBABSEIL_CPP_ARCH_SUPPORTS.

 - Added the Fixes: tags (commit + autobuild result) to both patches.

 - Documented since when the problem exists, with autobuild links on the
   maintained branches, so that the LTS maintainers can decide about
   backports. Short version: both are broken since mips64 was first
   allowed, and both still need a backport to 2025.02.x; libabseil-cpp
   also to 2026.02.x.

 - Answered in the python-grpcio commit log why the Buildroot-provided
   abseil cannot be used instead of the bundled one: grpcio's
   GRPC_PYTHON_BUILD_SYSTEM_ABSL hardcodes /usr/include and globs
   /usr/lib*/libabsl_*.so, so it is unusable when cross-compiling, and
   it would not help here anyway since Buildroot's abseil has the same
   limitation.

Note that n32 is the default ABI for BR2_mips64/BR2_mips64el, so this
covers the default mips64 autobuilder configurations. All in-tree mips64
defconfigs use n64 and are unaffected.

Tested with olddefconfig on mips64el n32 (both packages and their reverse
dependencies disappear), mips64el n64 and x86_64 (both still selectable).

Yegor Yefremov (2):
  package/libabseil-cpp: disable for the MIPS n32 ABI
  package/python-grpcio: disable for the MIPS n32 ABI

 package/libabseil-cpp/Config.in | 4 ++++
 package/python-grpcio/Config.in | 5 +++++
 2 files changed, 9 insertions(+)

-- 
2.34.1

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