Define PRIVATE and add it to all global symbols so we don't export assembly functions.

libvpx/source/libvpx/vp8/encoder/x86/sad_ssse3.asm

 ;
 ;  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
 ;
 ;  Use of this source code is governed by a BSD-style license
 ;  that can be found in the LICENSE file in the root of the source
 ;  tree. An additional intellectual property rights grant can be found
 ;  in the file PATENTS.  All contributing project authors may
 ;  be found in the AUTHORS file in the root of the source tree.
 ;
 
@@ skipping 134 matching lines @@
         jmp             %2_store_off
 
 %endmacro
 
 ;void int vp8_sad16x16x3_ssse3(
 ;    unsigned char *src_ptr,
 ;    int  src_stride,
 ;    unsigned char *ref_ptr,
 ;    int  ref_stride,
 ;    int  *results)
-global sym(vp8_sad16x16x3_ssse3)
+global sym(vp8_sad16x16x3_ssse3) PRIVATE
 sym(vp8_sad16x16x3_ssse3):
     push        rbp
     mov         rbp, rsp
     SHADOW_ARGS_TO_STACK 5
     push        rsi
     push        rdi
     push        rcx
     ; end prolog
 
         mov             rsi,        arg(0) ;src_ptr
@@ skipping 90 matching lines @@
     UNSHADOW_ARGS
     pop         rbp
     ret
 
 ;void int vp8_sad16x8x3_ssse3(
 ;    unsigned char *src_ptr,
 ;    int  src_stride,
 ;    unsigned char *ref_ptr,
 ;    int  ref_stride,
 ;    int  *results)
-global sym(vp8_sad16x8x3_ssse3)
+global sym(vp8_sad16x8x3_ssse3) PRIVATE
 sym(vp8_sad16x8x3_ssse3):
     push        rbp
     mov         rbp, rsp
     SHADOW_ARGS_TO_STACK 5
     push        rsi
     push        rdi
     push        rcx
     ; end prolog
 
         mov             rsi,        arg(0) ;src_ptr
@@ skipping 80 matching lines @@
         paddw           xmm0,       xmm7
         movd            [rdi+8],    xmm0
 
     ; begin epilog
     pop         rcx
     pop         rdi
     pop         rsi
     UNSHADOW_ARGS
     pop         rbp
     ret