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cmake : fix static linking for OpenMP on Unix-like systems#16031

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slaren merged 1 commit intoggml-org:masterfrom
angt:cmake-fix-static-linking-for-openmp-on-unix-like-systems
Sep 18, 2025
Merged

cmake : fix static linking for OpenMP on Unix-like systems#16031
slaren merged 1 commit intoggml-org:masterfrom
angt:cmake-fix-static-linking-for-openmp-on-unix-like-systems

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@angt angt commented Sep 16, 2025

When compiling with GGML_STATIC=ON, the build process would produce a binary that was still dynamically linked to OpenMP. This defeats the purpose of a static build:

$ cmake -B build \
        -DBUILD_SHARED_LIBS=OFF \
        -DLLAMA_CURL=OFF \
        -DGGML_CCACHE=OFF \
        -DGGML_NATIVE=OFF \
        -DGGML_STATIC=ON

$ ldd llama-server
        linux-vdso.so.1 (0x0000e1a434e3b000)
        libgomp.so.1 => /lib/aarch64-linux-gnu/libgomp.so.1 (0x0000e1a4345a0000)
        libstdc++.so.6 => /lib/aarch64-linux-gnu/libstdc++.so.6 (0x0000e1a434300000)
        libm.so.6 => /lib/aarch64-linux-gnu/libm.so.6 (0x0000e1a434240000)
        libgcc_s.so.1 => /lib/aarch64-linux-gnu/libgcc_s.so.1 (0x0000e1a434200000)
        libc.so.6 => /lib/aarch64-linux-gnu/libc.so.6 (0x0000e1a434030000)
        /lib/ld-linux-aarch64.so.1 (0x0000e1a434df0000)

This commit resolves the issue by modifying CMAKE_FIND_LIBRARY_SUFFIXES to prioritize .a files, forcing CMake to link the static version of the library.

When compiling with GGML_STATIC=ON, the build process would produce a
binary that was still dynamically linked to OpenMP. This defeats the
purpose of a static build:

    $ cmake -B build \
            -DBUILD_SHARED_LIBS=OFF \
            -DLLAMA_CURL=OFF \
            -DGGML_CCACHE=OFF \
            -DGGML_NATIVE=OFF \
            -DGGML_STATIC=ON

    $ ldd llama-server
            linux-vdso.so.1 (0x0000e1a434e3b000)
            libgomp.so.1 => /lib/aarch64-linux-gnu/libgomp.so.1 (0x0000e1a4345a0000)
            libstdc++.so.6 => /lib/aarch64-linux-gnu/libstdc++.so.6 (0x0000e1a434300000)
            libm.so.6 => /lib/aarch64-linux-gnu/libm.so.6 (0x0000e1a434240000)
            libgcc_s.so.1 => /lib/aarch64-linux-gnu/libgcc_s.so.1 (0x0000e1a434200000)
            libc.so.6 => /lib/aarch64-linux-gnu/libc.so.6 (0x0000e1a434030000)
            /lib/ld-linux-aarch64.so.1 (0x0000e1a434df0000)

This commit resolves the issue by modifying `CMAKE_FIND_LIBRARY_SUFFIXES`
to prioritize `.a` files, forcing CMake to link the static version of
the library.

Signed-off-by: Adrien Gallouët <angt@huggingface.co>
@github-actions github-actions Bot added the ggml changes relating to the ggml tensor library for machine learning label Sep 16, 2025
@slaren slaren merged commit 246c0d9 into ggml-org:master Sep 18, 2025
47 of 48 checks passed
EZForever added a commit to EZForever/llama.cpp-static that referenced this pull request Sep 19, 2025
pwilkin pushed a commit to pwilkin/llama.cpp that referenced this pull request Oct 23, 2025
…16031)

When compiling with GGML_STATIC=ON, the build process would produce a
binary that was still dynamically linked to OpenMP. This defeats the
purpose of a static build:

    $ cmake -B build \
            -DBUILD_SHARED_LIBS=OFF \
            -DLLAMA_CURL=OFF \
            -DGGML_CCACHE=OFF \
            -DGGML_NATIVE=OFF \
            -DGGML_STATIC=ON

    $ ldd llama-server
            linux-vdso.so.1 (0x0000e1a434e3b000)
            libgomp.so.1 => /lib/aarch64-linux-gnu/libgomp.so.1 (0x0000e1a4345a0000)
            libstdc++.so.6 => /lib/aarch64-linux-gnu/libstdc++.so.6 (0x0000e1a434300000)
            libm.so.6 => /lib/aarch64-linux-gnu/libm.so.6 (0x0000e1a434240000)
            libgcc_s.so.1 => /lib/aarch64-linux-gnu/libgcc_s.so.1 (0x0000e1a434200000)
            libc.so.6 => /lib/aarch64-linux-gnu/libc.so.6 (0x0000e1a434030000)
            /lib/ld-linux-aarch64.so.1 (0x0000e1a434df0000)

This commit resolves the issue by modifying `CMAKE_FIND_LIBRARY_SUFFIXES`
to prioritize `.a` files, forcing CMake to link the static version of
the library.

Signed-off-by: Adrien Gallouët <angt@huggingface.co>
blime4 referenced this pull request in blime4/llama.cpp Feb 5, 2026
When compiling with GGML_STATIC=ON, the build process would produce a
binary that was still dynamically linked to OpenMP. This defeats the
purpose of a static build:

    $ cmake -B build \
            -DBUILD_SHARED_LIBS=OFF \
            -DLLAMA_CURL=OFF \
            -DGGML_CCACHE=OFF \
            -DGGML_NATIVE=OFF \
            -DGGML_STATIC=ON

    $ ldd llama-server
            linux-vdso.so.1 (0x0000e1a434e3b000)
            libgomp.so.1 => /lib/aarch64-linux-gnu/libgomp.so.1 (0x0000e1a4345a0000)
            libstdc++.so.6 => /lib/aarch64-linux-gnu/libstdc++.so.6 (0x0000e1a434300000)
            libm.so.6 => /lib/aarch64-linux-gnu/libm.so.6 (0x0000e1a434240000)
            libgcc_s.so.1 => /lib/aarch64-linux-gnu/libgcc_s.so.1 (0x0000e1a434200000)
            libc.so.6 => /lib/aarch64-linux-gnu/libc.so.6 (0x0000e1a434030000)
            /lib/ld-linux-aarch64.so.1 (0x0000e1a434df0000)

This commit resolves the issue by modifying `CMAKE_FIND_LIBRARY_SUFFIXES`
to prioritize `.a` files, forcing CMake to link the static version of
the library.

Signed-off-by: Adrien Gallouët <angt@huggingface.co>
Seunghhon pushed a commit to Seunghhon/llama.cpp that referenced this pull request Apr 26, 2026
…16031)

When compiling with GGML_STATIC=ON, the build process would produce a
binary that was still dynamically linked to OpenMP. This defeats the
purpose of a static build:

    $ cmake -B build \
            -DBUILD_SHARED_LIBS=OFF \
            -DLLAMA_CURL=OFF \
            -DGGML_CCACHE=OFF \
            -DGGML_NATIVE=OFF \
            -DGGML_STATIC=ON

    $ ldd llama-server
            linux-vdso.so.1 (0x0000e1a434e3b000)
            libgomp.so.1 => /lib/aarch64-linux-gnu/libgomp.so.1 (0x0000e1a4345a0000)
            libstdc++.so.6 => /lib/aarch64-linux-gnu/libstdc++.so.6 (0x0000e1a434300000)
            libm.so.6 => /lib/aarch64-linux-gnu/libm.so.6 (0x0000e1a434240000)
            libgcc_s.so.1 => /lib/aarch64-linux-gnu/libgcc_s.so.1 (0x0000e1a434200000)
            libc.so.6 => /lib/aarch64-linux-gnu/libc.so.6 (0x0000e1a434030000)
            /lib/ld-linux-aarch64.so.1 (0x0000e1a434df0000)

This commit resolves the issue by modifying `CMAKE_FIND_LIBRARY_SUFFIXES`
to prioritize `.a` files, forcing CMake to link the static version of
the library.

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