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I'm building ggml on debian and got warning and note:
~/ggml/build$ cmake --build . --config Release -j 8
[ 1%] Building C object src/CMakeFiles/ggml-base.dir/ggml-alloc.c.o
[ 2%] Building CXX object examples/CMakeFiles/common.dir/common.cpp.o
[ 3%] Building CXX object src/CMakeFiles/ggml-base.dir/ggml-backend.cpp.o
[ 5%] Building C object src/CMakeFiles/ggml-base.dir/ggml.c.o
[ 6%] Building CXX object src/CMakeFiles/ggml-base.dir/ggml-opt.cpp.o
[ 6%] Building CXX object src/CMakeFiles/ggml-base.dir/ggml-threading.cpp.o
[ 7%] Building C object src/CMakeFiles/ggml-base.dir/ggml-quants.c.o
[ 8%] Building CXX object src/CMakeFiles/ggml-base.dir/gguf.cpp.o
[ 9%] Linking CXX shared library libggml-base.so
[ 9%] Built target ggml-base
[ 10%] Building CXX object src/CMakeFiles/ggml-cpu.dir/ggml-cpu/ggml-cpu.cpp.o
[ 11%] Building C object src/CMakeFiles/ggml-cpu.dir/ggml-cpu/ggml-cpu.c.o
[ 13%] Building CXX object src/CMakeFiles/ggml-cpu.dir/ggml-cpu/ggml-cpu-aarch64.cpp.o
[ 15%] Building CXX object src/CMakeFiles/ggml-cpu.dir/ggml-cpu/ggml-cpu-hbm.cpp.o
[ 15%] Building C object src/CMakeFiles/ggml-cpu.dir/ggml-cpu/ggml-cpu-quants.c.o
[ 15%] Building CXX object src/CMakeFiles/ggml-cpu.dir/ggml-cpu/ggml-cpu-traits.cpp.o
[ 16%] Building CXX object src/CMakeFiles/ggml-cpu.dir/ggml-cpu/amx/amx.cpp.o
[ 17%] Building CXX object src/CMakeFiles/ggml-cpu.dir/ggml-cpu/amx/mmq.cpp.o
In function ‘block_q4_0x4 make_block_q4_0x4(block_q4_0*, unsigned int)’,
inlined from ‘int repack_q4_0_to_q4_0_4_bl(ggml_tensor*, int, const void*, size_t)’ at /home/admin/ggml/src/ggml-cpu/ggml-cpu-aarch64.cpp:3685:39:
/home/admin/ggml/src/ggml-cpu/ggml-cpu-aarch64.cpp:3614:19: warning: writing 32 bytes into a region of size 0 [-Wstringop-overflow=]
3614 | memcpy(&out.qs[dst_offset], &elems, sizeof(uint64_t));
| ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/admin/ggml/src/ggml-cpu/ggml-cpu-aarch64.cpp: In function ‘int repack_q4_0_to_q4_0_4_bl(ggml_tensor*, int, const void*, size_t)’:
/home/admin/ggml/src/ggml-cpu/ggml-cpu-aarch64.cpp:3685:20: note: at offset 72 into destination object ‘<anonymous>’ of size 72
3685 | *dst++ = make_block_q4_0x4(dst_tmp, interleave_block);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In function ‘block_q4_0x4 make_block_q4_0x4(block_q4_0*, unsigned int)’,
inlined from ‘int repack_q4_0_to_q4_0_4_bl(ggml_tensor*, int, const void*, size_t)’ at /home/admin/ggml/src/ggml-cpu/ggml-cpu-aarch64.cpp:3685:39:
/home/admin/ggml/src/ggml-cpu/ggml-cpu-aarch64.cpp:3614:19: warning: writing 32 bytes into a region of size 0 [-Wstringop-overflow=]
3614 | memcpy(&out.qs[dst_offset], &elems, sizeof(uint64_t));
| ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/admin/ggml/src/ggml-cpu/ggml-cpu-aarch64.cpp: In function ‘int repack_q4_0_to_q4_0_4_bl(ggml_tensor*, int, const void*, size_t)’:
/home/admin/ggml/src/ggml-cpu/ggml-cpu-aarch64.cpp:3685:20: note: at offset 104 into destination object ‘<anonymous>’ of size 72
3685 | *dst++ = make_block_q4_0x4(dst_tmp, interleave_block);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
[ 18%] Linking CXX static library libcommon.a
[ 18%] Built target common
[ 19%] Linking CXX shared library libggml-cpu.so
[ 19%] Built target ggml-cpu
[ 20%] Building CXX object src/CMakeFiles/ggml.dir/ggml-backend-reg.cpp.o
[ 21%] Linking CXX shared library libggml.so
[ 21%] Built target ggml
...it referencing this method:
https://github.com/ggerganov/ggml/blob/475e01227333a3a29ed0859b477beabcc2de7b5e/src/ggml-cpu/ggml-cpu-aarch64.cpp#L3594-L3634
this might be issue in building app that requires ggml in debian such as ollama
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