indications are that we can use mfence, lfence, sfence on x86_64, we will need…

indications are that we can use mfence, lfence, sfence on x86_64, we will need to test and confirm this, but this should fix the build on 64 bit linux gcc at least.  need testers to confirm this.

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@3998 d0543943-73ff-0310-b7d9-9358b9ac24b2

libs/portaudio/src/common/pa_ringbuffer.c

@@ -85,7 +85,7 @@
 #      define PaUtil_FullMemoryBarrier()  asm volatile("sync":::"memory")
 #      define PaUtil_ReadMemoryBarrier()  asm volatile("sync":::"memory")
 #      define PaUtil_WriteMemoryBarrier() asm volatile("sync":::"memory")
-#   elif defined( __i386__ ) || defined( __i486__ ) || defined( __i586__ ) || defined( __i686__ )
+#   elif defined( __i386__ ) || defined( __i486__ ) || defined( __i586__ ) || defined( __i686__ ) || defined(__x86_64__)
 #      define PaUtil_FullMemoryBarrier()  asm volatile("mfence":::"memory")
 #      define PaUtil_ReadMemoryBarrier()  asm volatile("lfence":::"memory")
 #      define PaUtil_WriteMemoryBarrier() asm volatile("sfence":::"memory")

src/mod/endpoints/mod_portaudio/pa_ringbuffer.c

@@ -85,7 +85,7 @@
 #      define PaUtil_FullMemoryBarrier()  asm volatile("sync":::"memory")
 #      define PaUtil_ReadMemoryBarrier()  asm volatile("sync":::"memory")
 #      define PaUtil_WriteMemoryBarrier() asm volatile("sync":::"memory")
-#   elif defined( __i386__ ) || defined( __i486__ ) || defined( __i586__ ) || defined( __i686__ )
+#   elif defined( __i386__ ) || defined( __i486__ ) || defined( __i586__ ) || defined( __i686__ ) || defined(__x86_64__)
 #      define PaUtil_FullMemoryBarrier()  asm volatile("mfence":::"memory")
 #      define PaUtil_ReadMemoryBarrier()  asm volatile("lfence":::"memory")
 #      define PaUtil_WriteMemoryBarrier() asm volatile("sfence":::"memory")