0025-Disable-ggml-blas-on-macos-v13-and-older.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Daniel Hiltgen <daniel@ollama.com>
Date: Sun, 3 Aug 2025 10:00:20 -0700
Subject: [PATCH] Disable ggml-blas on macos v13 and older

---
 ggml/src/ggml-blas/ggml-blas.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/ggml/src/ggml-blas/ggml-blas.cpp b/ggml/src/ggml-blas/ggml-blas.cpp
index ec158dfa..22926d75 100644
--- a/ggml/src/ggml-blas/ggml-blas.cpp
+++ b/ggml/src/ggml-blas/ggml-blas.cpp
@@ -505,6 +505,11 @@ static const struct ggml_backend_reg_i ggml_backend_blas_reg_i = {
 };
 
 ggml_backend_reg_t ggml_backend_blas_reg(void) {
+    // MacOS prior to v14 does not include cblas_sgemm - disable this backend if it isn't available
+    if (&cblas_sgemm == NULL) {
+        GGML_LOG_INFO("Disabling ggml-blas backend on old MacOS version\n");
+        return NULL;
+    }
     static struct ggml_backend_reg ggml_backend_blas_reg = {
         /* .api_version = */ GGML_BACKEND_API_VERSION,
         /* .iface       = */ ggml_backend_blas_reg_i,