Re: [Buildroot] [PATCH 3/9] package/libabseil-cpp: allow building with musl

[Thomas Petazzoni via buildroot <buildroot@buildroot.org>]

On Fri, Oct 30, 2026 at 04:24:28PM +0100, Angelo Compagnucci wrote:
> libabseil-cpp depends on BR2_TOOLCHAIN_HAS_UCONTEXT, which is not set
> for musl, as it doesn't provide the {get,make,set}context functions.
> 
> However, absl/debugging/internal/examine_stack.cc only uses the ucontext
> data structures, to get the program counter from the signal context,
> and never calls those functions. musl provides those data structures,
> so allow building with musl.
> 
> On 32-bit powerpc, examine_stack.cc assumes the glibc layout of
> mcontext_t (uc_mcontext.uc_regs), which is different with musl, so keep
> it disabled there.
> 
> examine_stack.cc was build-tested with the Bootlin musl toolchains for
> aarch64, armv7, i686, x86-64, m68k, mips32el, powerpc64, powerpc64le,
> riscv32, riscv64, s390x and sh4, and libabseil-cpp, re2, protobuf, grpc
> and webrtc-audio-processing with the aarch64 and armv7 musl toolchains.
> 
> Signed-off-by: Angelo Compagnucci <angelo.compagnucci@gmail.com>

Applied to master, thanks!

Best regards,

Thomas Petazzoni
-- 
Thomas Petazzoni, co-owner and CEO, Bootlin
Embedded Linux and Kernel engineering and training
https://bootlin.com
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