From 20bcce507aa6b9c866e34eee75d80305109767a8 Mon Sep 17 00:00:00 2001
From: Mans Rullgard <mans@mansr.com>
Date: Thu, 16 Aug 2012 00:10:33 +0100
Subject: [PATCH] configure: clean up Altivec detection

There used to be one test for Altivec intrinsics support and a
separate test to determine which of two possible syntaxes to use
for vector literals.  Since 2008, we only support the more common
of these so the split test no longer makes sense.

This combines the tests into one and also changes the hard error on
failure to a warning.  The test can reasonably fail if no --cpu flag
is provided (or is provided with an unknown CPU) and the compiler
default target does not support Altivec.  Aborting in this case is
probably over-reacting.

Signed-off-by: Mans Rullgard <mans@mansr.com>
---
 configure | 11 ++++-------
 1 file changed, 4 insertions(+), 7 deletions(-)

diff --git a/configure b/configure
index 6622b24770..18f81e4d31 100755
--- a/configure
+++ b/configure
@@ -2875,17 +2875,14 @@ elif enabled ppc; then
         check_cc <<EOF || disable altivec
 $inc_altivec_h
 int main(void) {
-    vector signed int v1, v2, v3;
-    v1 = vec_add(v2,v3);
+    vector signed int v1 = (vector signed int) { 0 };
+    vector signed int v2 = (vector signed int) { 1 };
+    v1 = vec_add(v1, v2);
     return 0;
 }
 EOF
 
-        # check if our compiler supports braces for vector declarations
-        check_cc <<EOF || die "You need a compiler that supports {} in AltiVec vector declarations."
-$inc_altivec_h
-int main (void) { (vector int) {1}; return 0; }
-EOF
+        enabled altivec || warn "Altivec disabled, possibly missing --cpu flag"
     fi
 
 elif enabled sparc; then