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ggml : revert to -lm linking instead of find_library (#22355)

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* ggml : revert to -lm linking instead of find_library

`find_library(MATH_LIBRARY m)` was introduced recently, but it breaks
CUDA compilation with GGML_STATIC. I could not find any valid use case
where we would prefer `find_library` over the standard `-lm` approach.

This commit is also meant to start a discussion if there is a valid
reason to keep `find_library(MATH_LIBRARY m)`, we should clarify what
problem it was solving and find an alternative fix that does not break
CUDA with GGML_STATIC.

Signed-off-by: Adrien Gallouët <angt@huggingface.co>

* ggml : use MATH_LIBRARY only if defined

Signed-off-by: Adrien Gallouët <angt@huggingface.co>

* ggml : fix initial broken condition

Signed-off-by: Adrien Gallouët <angt@huggingface.co>

* ggml : always respect MATH_LIBRARY when defined

Signed-off-by: Adrien Gallouët <angt@huggingface.co>

---------

Signed-off-by: Adrien Gallouët <angt@huggingface.co>
This commit is contained in:
Adrien Gallouët
2026-04-28 08:56:02 +02:00
committed by GitHub
parent c3e08f4700
commit d530d6e7a2
1 changed files with 4 additions and 5 deletions
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ggml/src/CMakeLists.txt
+4 -5
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@@ -470,11 +470,10 @@ endforeach()
target_link_libraries(ggml-base PRIVATE Threads::Threads)
find_library(MATH_LIBRARY m)
if (MATH_LIBRARY)
if (NOT WIN32 OR NOT DEFINED ENV{ONEAPI_ROOT})
target_link_libraries(ggml-base PRIVATE ${MATH_LIBRARY})
endif()
if (DEFINED MATH_LIBRARY)
target_link_libraries(ggml-base PRIVATE ${MATH_LIBRARY})
elseif (NOT WIN32 AND NOT DEFINED ENV{ONEAPI_ROOT})
target_link_libraries(ggml-base PRIVATE m)
endif()
if (CMAKE_SYSTEM_NAME MATCHES "Android")