[Bug] Build failure on Ubuntu with GCC 13: Error: unsupported instruction `vpdpbusd`

[hanksgggggg]

Describe the bug

When attempting to compile audio.cpp on Ubuntu using GCC 13, the build fails during the assembly stage. The assembler throws multiple errors stating that the vpdpbusd instruction is unsupported.

This usually happens when the compiler generates VNNI (Vector Neural Network Instructions) execution paths, but the underlying assembler (as from binutils) or the targeted architecture flags do not fully support or recognize it without specific CPU target flags (like -march=native or -mavxvnni).

Environment

• OS: Ubuntu (Linux)
• Compiler: GCC 13.0
• Target: audiocpp_cli & audiocpp_server

How to Reproduce

Run the standard build command:

cmake -S . -B build
cmake --build build --parallel --target audiocpp_cli --target audiocpp_server


Build Logs / Error Output
tmp/ccM3KSyw.s: Assembler messages:
/tmp/ccM3KSyw.s:2810: Error: unsupported instruction `vpdpbusd'
/tmp/ccM3KSyw.s:3277: Error: unsupported instruction `vpdpbusd'
/tmp/ccM3KSyw.s:4863: Error: unsupported instruction `vpdpbusd'
/tmp/ccM3KSyw.s:5467: Error: unsupported instruction `vpdpbusd'
/tmp/ccM3KSyw.s:5785: Error: unsupported instruction `vpdpbusd'

Is there a specific CMake flag we should pass to disable VNNI extensions if the host CPU/assembler doesn't natively support them, or should a specific -march flag be enforced in the CMakeLists.txt for GCC 13? Any guidance on how to bypass this compilation block would be greatly appreciated!

[0xShug0]

@hanksgggggg Please try the latest commit and configure with:
cmake -S . -B build -DENGINE_ENABLE_NATIVE_CPU=OFF
This disables native ggml CPU ISA generation, which should avoid the vpdpbusd assembler issue. Let me know if it works.

Note that audio.cpp is currently not optimized for CPU inference. Disabling native CPU optimization may reduce CPU performance further, but it is the intended portable-build workaround for toolchains that cannot assemble those generated instructions.

[hanksgggggg]

Hello, it's the exact same error, no change.

[hanksgggggg]

I've tried this on multiple different Ubuntu machines now, and I'm still getting the exact same error.

[0xShug0]

@hanksgggggg Could you run cmake -S . -B build -DENGINE_ENABLE_NATIVE_CPU=OFF, build, and paste the logs?

[0xShug0]

@hanksgggggg also please delete old build artifacts/cache and rebuild everything from scratch

[0xShug0]

@hanksgggggg also add another flag ---
rm -rf build
cmake -S . -B build
-DENGINE_ENABLE_NATIVE_CPU=OFF
-DENGINE_ENABLE_LLAMAFILE=OFF
cmake --build build --parallel --target audiocpp_cli --target audiocpp_server