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ggml-cpu: detect correct cpu flags for arm64 (#16229) (#16239)

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When using GCC 9 and GCC 12 on the arm64 platform of ubuntu 2004,
the command "gcc -mcpu=native -E -v -" fails to detect the correct CPU flags,
which results in compilation failures for certain extended instructions,
but the correct CPU flags can be obtained by using gcc -march.

Signed-off-by: lizhenneng <lizhenneng@kylinos.cn>
Co-authored-by: lizhenneng <lizhenneng@kylinos.cn>
This commit is contained in:
iron
2025-11-08 00:18:14 +08:00
committed by GitHub
parent 8c0d6bb455
commit 7c23f3f0d4
1 changed files with 4 additions and 4 deletions
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8
ggml/src/ggml-cpu/CMakeLists.txt
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@@ -118,18 +118,18 @@ function(ggml_add_cpu_backend_variant_impl tag_name)
# so we check for them manually and enable them if available
execute_process(
COMMAND ${CMAKE_C_COMPILER} -mcpu=native -E -v -
COMMAND ${CMAKE_C_COMPILER} -march=native -E -v -
INPUT_FILE "/dev/null"
OUTPUT_QUIET
ERROR_VARIABLE ARM_MCPU
RESULT_VARIABLE ARM_MCPU_RESULT
)
if (NOT ARM_MCPU_RESULT)
string(REGEX MATCH "-mcpu=[^ ']+" ARM_MCPU_FLAG "${ARM_MCPU}")
string(REGEX MATCH "-march=[^ ']+" ARM_MCPU_FLAG "${ARM_MCPU}")
endif()
if ("${ARM_MCPU_FLAG}" STREQUAL "")
set(ARM_MCPU_FLAG -mcpu=native)
message(STATUS "ARM -mcpu not found, -mcpu=native will be used")
set(ARM_MCPU_FLAG -march=native)
message(STATUS "ARM -mcpu not found, -march=native will be used")
endif()
include(CheckCXXSourceRuns)