From 3ca5e9bdce7e7bc0a9f3e218989e8ace5c675c2f Mon Sep 17 00:00:00 2001
From: Vsevolod Stakhov <vsevolod@rspamd.com>
Date: Mon, 16 Sep 2024 14:22:42 +0100
Subject: [PATCH] [Minor] Detect __builtin_cpu_supports

---
 CMakeLists.txt | 7 +++++++
 config.h.in    | 1 +
 2 files changed, 8 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index a9bb50642..44ebd8c3a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -472,6 +472,13 @@ int main(int argc, char **argv) {
 }
 " HAVE_ATOMIC_BUILTINS)
 
+CHECK_C_SOURCE_RUNS("#include <stdio.h>
+int main() {
+  __builtin_cpu_init();
+  printf(\"%d\", __builtin_cpu_supports(\"avx\"));
+  return 0;
+}" HAVE_BUILTIN_CPU_SUPPORTS)
+
 IF (NOT HAVE_ATOMIC_BUILTINS)
     MESSAGE(STATUS "atomic builtins are -NOT- supported")
 ELSE ()
diff --git a/config.h.in b/config.h.in
index 59c70c67c..9aff90783 100644
--- a/config.h.in
+++ b/config.h.in
@@ -115,6 +115,7 @@
 #cmakedefine WITH_LUA_REPL       1
 #cmakedefine WITH_FASTTEXT       1
 #cmakedefine BACKWARD_ENABLE     1
+#cmakedefine HAVE_BUILTIN_CPU_SUPPORTS 1
 
 #cmakedefine DISABLE_PTHREAD_MUTEX 1
 
-- 
2.39.5