[Build] onnxruntime-1.25.0 does not build on Raspberry Pi (Bookworm) 32-bit

[dave-richards]

Describe the issue

The issue is the lack of a -latomic being passed to the linker. I was able to force this in the main onnxruntime cmakelist.txt file, but the unit tests have the same issue. My uname -a is:
Linux rpi4 6.12.75+rpt-rpi-v7l #1 SMP Raspbian 1:6.12.75-1+rpt1~bookworm (2026-03-11) armv7l GNU/Linux

Urgency

No response

Target platform

Raspberry Pi OS Bookworm (32-bit)

Build script

build.sh

Error / output

/usr/lib/ld gets an error claiming it cannot add symbols to libatoic.so.

Visual Studio Version

No response

GCC / Compiler Version

12

[dave-richards]

The following script does build correctly:
#!/usr/bin/bash
set -e
rm -rf ${HOME}/onnxruntime-1.25.0 ${HOME}/onnxruntime
tar xf ${HOME}/Archive/onnxruntime-1.25.0.tar.gz
cd ${HOME}/onnxruntime-1.25.0
./build.sh
--config Release
--build_shared_lib
--parallel
--compile_no_warning_as_error
--skip_submodule_sync
--cmake_extra_defines CMAKE_INSTALL_PREFIX=${HOME}/onnxruntime
--skip_tests
--skip_pip_install
--skip_onnx_tests
--cmake_extra_defines onnxruntime_BUILD_UNIT_TESTS=OFF
cd ${HOME}/onnxruntime-1.25.0/build/Linux/Release
make
make install