From 6a7e928555d081ff86c867867ebce74fdc4c87d6 Mon Sep 17 00:00:00 2001
From: Luca Barbato <lu_zero@gentoo.org>
Date: Wed, 10 May 2017 17:18:48 +0200
Subject: [PATCH] configure: Do not check for the __builtin_vec_vsx_ld

Clang support for Altivec/VSX uses a different approach.
---
 configure | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/configure b/configure
index d6c44cf89e..be52d4df92 100755
--- a/configure
+++ b/configure
@@ -4447,7 +4447,14 @@ EOF
 
     if enabled vsx; then
         check_cflags -mvsx &&
-        check_builtin vec_vsx_ld "altivec.h" "__builtin_vec_vsx_ld" || disable vsx
+        check_cc <<EOF || disable vsx
+$inc_altivec_h
+int main(void) {
+    int v[4] = { 0 };
+    vector signed int v1 = vec_vsx_ld(0, v);
+    return 0;
+}
+EOF
     fi
 
     if enabled power8; then