Bug: CMAKE doesn't support RISC-V Vector Extention

[angelosathanasiadis]

What happened?

I hava managed to use RVV by building the llama.cpp with make (RISCV_VECT = 1). As you can see in the next figure:

When I try to use RVV by building the llama.cpp with cmake, the RVV is not used (RISCV_VECT = 0), as you can see in the figure below:

If I understand correctly from the Makefile (lines 516-517), I need to add somewhere, in the CMakefiles.txt these flags:

-march=rv64gcv -mabi=lp64d

Do you know maybe where I should add them?

Name and Version

version: 3861 (f1b8c42)
built with cc (Ubuntu 13.1.0-8ubuntu1~22.04) 13.1.0 for riscv64-linux-gnu

What operating system are you seeing the problem on?

Linux

Relevant log output

No response

[lhpqaq]

You can try adding this in ggml/src/ggml-cpu/CMakeLists.txt: line 247

elseif (${CMAKE_SYSTEM_PROCESSOR} MATCHES "riscv64")
    message(STATUS "RISC-V detected")
    if (GGML_RVV)
        list(APPEND ARCH_FLAGS -march=rv64gcv -mabi=lp64d)
    endif()

and ggml/CMakeLists.txt:112

option(GGML_RVV         "ggml: enable rvv"              ON)

It's just my guess

[angelosathanasiadis]

thanks a lot for your fast responce! It works great now!