Vulkan L_NV_cooperative_matrix2 shader compile error

[Marcel2508]

Hey, when trying to build it (on a PI5 and AMD GPU) with vulkan I get the following warnings / error's:

cmake -B build -DGGML_VULKAN=1
-- CMAKE_SYSTEM_PROCESSOR: aarch64
-- Including CPU backend
-- ARM detected
-- ARM feature DOTPROD enabled
-- ARM feature FMA enabled
-- ARM feature FP16_VECTOR_ARITHMETIC enabled
-- Adding CPU backend variant ggml-cpu: -mcpu=cortex-a76+crypto+dotprod+noi8mm+nosve 
-- Vulkan found
-- GL_NV_cooperative_matrix2 not supported by glslc
-- Including Vulkan backend
-- Configuring done
-- Generating done

Probably because GL_NV_cooperative_matrix2 not supported by glslc I than get the following errors during build:

cmake --build build -j 6
[  4%] Built target vulkan-shaders-gen
[ 17%] Built target main
[ 17%] Built target bench
[ 17%] Built target stream
[ 32%] Built target ggml-base
[ 36%] Built target command
[ 39%] Generate vulkan shaders
ggml_vulkan: Generating and compiling shaders to SPIR-V
[ 58%] Built target ggml-cpu
cannot compile matmul_f32_f16_aligned_coopmat

/bin/glslc -fshader-stage=compute --target-env=vulkan1.2  /home/pi/whisper.cpp/ggml/src/ggml-vulkan/vulkan-shaders/mul_mm.comp -o /home/pi/whisper.cpp/build/ggml/src/ggml-vulkan/vulkan-shaders.spv/matmul_f32_f16_aligned_coopmat.spv -DACC_TYPE=float -DALIGNED=1 -DB_TYPE=f16mat2x4 -DCOOPMAT=1 -DDATA_A_F32=1 -DD_TYPE=float -DFLOAT16=1 -DFLOAT_TYPE=float16_t -DLOAD_VEC_A=8 -DLOAD_VEC_B=8 

/home/pi/whisper.cpp/ggml/src/ggml-vulkan/vulkan-shaders/mul_mm.comp:11: warning: '#extension' : extension not supported: GL_KHR_cooperative_matrix
/home/pi/whisper.cpp/ggml/src/ggml-vulkan/vulkan-shaders/mul_mm.comp:195: error: 'coopmat' : undeclared identifier
/home/pi/whisper.cpp/ggml/src/ggml-vulkan/vulkan-shaders/mul_mm.comp:195: error: '' :  syntax error, unexpected COMMA, expecting LEFT_PAREN
1 warning and 2 errors generated.

cannot compile matmul_f32_f16_coopmat

/bin/glslc -fshader-stage=compute --target-env=vulkan1.2  /home/pi/whisper.cpp/ggml/src/ggml-vulkan/vulkan-shaders/mul_mm.comp -o /home/pi/whisper.cpp/build/ggml/src/ggml-vulkan/vulkan-shaders.spv/matmul_f32_f16_coopmat.spv -DACC_TYPE=float -DB_TYPE=float16_t -DCOOPMAT=1 -DDATA_A_F32=1 -DD_TYPE=float -DFLOAT16=1 -DFLOAT_TYPE=float16_t 

/home/pi/whisper.cpp/ggml/src/ggml-vulkan/vulkan-shaders/mul_mm.comp:11: warning: '#extension' : extension not supported: GL_KHR_cooperative_matrix
/home/pi/whisper.cpp/ggml/src/ggml-vulkan/vulkan-shaders/mul_mm.comp:195: error: 'coopmat' : undeclared identifier
/home/pi/whisper.cpp/ggml/src/ggml-vulkan/vulkan-shaders/mul_mm.comp:195: error: '' :  syntax error, unexpected COMMA, expecting LEFT_PAREN
1 warning and 2 errors generated.

cannot compile matmul_f16_f32_aligned_coopmat
[....]

I guess this happens because it tries to use the unsupported vulkan feature? How could I disable it?
Is this PR maybe related to this problem? ggml-org/llama.cpp#11117

Has anyone already found a solution around this? llama.cpp builds fine for me with vulkan support

[Marcel2508]

It looks like a problem with debian 12 / the outdated vulkan version that comes with it.
I've built it from source and its now working.

However this probably shouldn't be the solution as properly implementing feature checks would be the better thing