From c39dd2db8e5e8bca1f6d4e15208f9c825615b969 Mon Sep 17 00:00:00 2001
From: Georgi Gerganov <ggerganov@gmail.com>
Date: Thu, 18 Jun 2026 09:16:06 +0300
Subject: [PATCH] metal : check for BF16 support in concat kernel (llama/24747)

---
 ggml/src/ggml-metal/ggml-metal.metal | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/ggml/src/ggml-metal/ggml-metal.metal b/ggml/src/ggml-metal/ggml-metal.metal
index 31b5326ec..25e78e100 100644
--- a/ggml/src/ggml-metal/ggml-metal.metal
+++ b/ggml/src/ggml-metal/ggml-metal.metal
@@ -7557,7 +7557,9 @@ typedef decltype(kernel_concat<float>) kernel_concat_t;
 
 template [[host_name("kernel_concat_f32")]]  kernel kernel_concat_t kernel_concat<float>;
 template [[host_name("kernel_concat_f16")]]  kernel kernel_concat_t kernel_concat<half>;
+#if defined(GGML_METAL_HAS_BF16)
 template [[host_name("kernel_concat_bf16")]] kernel kernel_concat_t kernel_concat<bfloat>;
+#endif
 template [[host_name("kernel_concat_i8")]]   kernel kernel_concat_t kernel_concat<char>;
 template [[host_name("kernel_concat_i16")]]  kernel kernel_concat_t kernel_concat<short>;
 template [[host_name("kernel_concat_i32")]]  kernel kernel_concat_t kernel_concat<int>;