fix build on macOS when Metal is disabled#196
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ggml-blas was only linked and had PIC set inside the GGML_METAL condition, but on macOS, ggml enables the BLAS backend by default (via Accelerate) regardless of whether Metal is enabled. This caused an undefined symbol error for ggml_backend_blas_reg at link time. Decouple ggml-blas from the Metal condition by using `if (TARGET ggml-blas)` instead, which correctly handles all cases: macOS with or without Metal, Linux with OpenBLAS, and platforms without BLAS. Co-authored-by: Claude Signed-off-by: LoganDark <4723091+LoganDark@users.noreply.github.com>
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ggml-blas was only linked and had PIC set inside the GGML_METAL condition, but on macOS, ggml enables the BLAS backend by default (via Accelerate) regardless of whether Metal is enabled. This caused an undefined symbol error for ggml_backend_blas_reg at link time.
Decouple ggml-blas from the Metal condition by using
if (TARGET ggml-blas)instead, which correctly handles all cases: macOS with or without Metal, Linux with OpenBLAS, and platforms without BLAS.