From 7d5c8eb943f92a94b420568778d61e0bd6f7df43 Mon Sep 17 00:00:00 2001
From: claude-bot <claude@ancap.in.ua>
Date: Mon, 13 Jul 2026 12:40:01 +0000
Subject: Import xiph/opus @ 034c1b61a250457649d788bbf983b3f0fb63f02e

Snapshot for re3/reVC vendoring, per @lzcnt.
Source: https://github.com/xiph/opus (034c1b61a250457649d788bbf983b3f0fb63f02e).
---
 m4/opus-intrinsics.m4 | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)
 create mode 100644 m4/opus-intrinsics.m4

(limited to 'm4/opus-intrinsics.m4')

diff --git a/m4/opus-intrinsics.m4 b/m4/opus-intrinsics.m4
new file mode 100644
index 0000000..a262ca1
--- /dev/null
+++ b/m4/opus-intrinsics.m4
@@ -0,0 +1,29 @@
+dnl opus-intrinsics.m4
+dnl macro for testing for support for compiler intrinsics, either by default or with a compiler flag
+
+dnl OPUS_CHECK_INTRINSICS(NAME-OF-INTRINSICS, COMPILER-FLAG-FOR-INTRINSICS, VAR-IF-PRESENT, VAR-IF-DEFAULT, TEST-PROGRAM-HEADER, TEST-PROGRAM-BODY)
+AC_DEFUN([OPUS_CHECK_INTRINSICS],
+[
+   AC_MSG_CHECKING([if compiler supports $1 intrinsics])
+   AC_LINK_IFELSE(
+     [AC_LANG_PROGRAM($5, $6)],
+     [
+        $3=1
+        $4=1
+        AC_MSG_RESULT([yes])
+      ],[
+        $4=0
+        AC_MSG_RESULT([no])
+        AC_MSG_CHECKING([if compiler supports $1 intrinsics with $2])
+        save_CFLAGS="$CFLAGS"; CFLAGS="$CFLAGS $2"
+        AC_LINK_IFELSE([AC_LANG_PROGRAM($5, $6)],
+        [
+           AC_MSG_RESULT([yes])
+           $3=1
+        ],[
+           AC_MSG_RESULT([no])
+           $3=0
+        ])
+        CFLAGS="$save_CFLAGS"
+     ])
+])
-- 
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