new patch

Author: xkong-anaconda

recipe/0002-Fix-ARM-SVE-detection-for-old-kernel-headers.patch

@@ -0,0 +1,32 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Anaconda <[email protected]>
+Date: Mon, 11 Nov 2025 00:00:00 +0000
+Subject: [PATCH] Fix ARM SVE detection for old kernel headers
+
+PR_SVE_VL_LEN_MASK and PR_SVE_GET_VL are not available in older kernel
+headers (< Linux 4.15). Add guards to disable SVE vector length detection
+when these constants are not defined.
+
+This fixes compilation on aarch64 with older glibc/kernel headers.
+---
+ vendor/llama.cpp/ggml/src/ggml-cpu/ggml-cpu.c | 4 ++++
+ 1 file changed, 4 insertions(+)
+
+diff --git a/vendor/llama.cpp/ggml/src/ggml-cpu/ggml-cpu.c b/vendor/llama.cpp/ggml/src/ggml-cpu/ggml-cpu.c
+index 1111111..2222222 100644
+--- a/vendor/llama.cpp/ggml/src/ggml-cpu/ggml-cpu.c
++++ b/vendor/llama.cpp/ggml/src/ggml-cpu/ggml-cpu.c
+@@ -687,7 +687,11 @@ static int ggml_get_n_threads(struct ggml_compute_params * params, int n_tasks)
+
+ static void ggml_init_arm_arch_features(void) {
+ #if defined(__linux__) && defined(__aarch64__) && defined(__ARM_FEATURE_SVE)
++#if defined(PR_SVE_VL_LEN_MASK) && defined(PR_SVE_GET_VL)
+     ggml_arm_arch_features.sve_cnt = PR_SVE_VL_LEN_MASK & prctl(PR_SVE_GET_VL);
++#else
++    ggml_arm_arch_features.sve_cnt = 0;
++#endif
+ #endif
+ }
+
+--
+2.39.5

recipe/meta.yaml

@@ -14,6 +14,8 @@ source:
   patches:
     # Adapt shared library relocation for conda environments
     - 0001-Adapt-shared-library-relocation.patch
+    # Fix ARM SVE detection for old kernel headers on aarch64
+    - 0002-Fix-ARM-SVE-detection-for-old-kernel-headers.patch  # [linux and aarch64]
 
 build:
   number: 0