From b6f9bbeb2fc3b31e612a8a8ba5a0c91f9f5642b4 Mon Sep 17 00:00:00 2001
From: Paul Davis <paul@linuxaudiosystems.com>
Date: Tue, 11 Aug 2015 23:06:47 -0400
Subject: [PATCH] can't use xgetbv instruction with apple gcc under OS X Lion

---
 libs/pbd/fpu.cc | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/libs/pbd/fpu.cc b/libs/pbd/fpu.cc
index 5c98ddc3c9..7450b0d451 100644
--- a/libs/pbd/fpu.cc
+++ b/libs/pbd/fpu.cc
@@ -78,9 +78,16 @@ __cpuid(int regs[4], int cpuid_leaf)
 static uint64_t
 _xgetbv (uint32_t xcr)
 {
+#ifdef __APPLE__
+        /* it would be nice to make this work on OS X but as long we use veclib,
+           we don't really need to know about SSE/AVX on that platform.
+        */
+        return 0;
+#else
 	uint32_t eax, edx;
 	__asm__ volatile ("xgetbv" : "=a" (eax), "=d" (edx) : "c" (xcr));
 	return (static_cast<uint64_t>(edx) << 32) | eax;
+#endif
 }
 
 #define _XCR_XFEATURE_ENABLED_MASK 0