feat(backends): add sglang#9359
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Signed-off-by: Ettore Di Giacinto <mudler@localai.io>
sgl-kernel's shm.cpp uses __m512 AVX-512 intrinsics unconditionally; -march=native fails on CI runners without AVX-512 in /proc/cpuinfo. Force -march=sapphirerapids so the build always succeeds, matching sglang upstream's docker/xeon.Dockerfile recipe. The resulting binary still requires an AVX-512 capable CPU at runtime, so disable tests-sglang-grpc in test-extra.yml for the same reason tests-vllm-grpc is disabled. Local runs with make test-extra-backend-sglang still work on hosts with the right SIMD baseline. Signed-off-by: Ettore Di Giacinto <mudler@localai.io>
CXXFLAGS with -march=sapphirerapids was being overridden by add_compile_options(-march=native) in sglang's CPU CMakeLists.txt, since CMake appends those flags after CXXFLAGS. Sed-patch the CMakeLists.txt directly after cloning to replace -march=native.
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Description
This PR adds a sglang backend
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