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

libvpx/source/libvpx/vp8/encoder/x86/dct_sse2.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 41 matching lines @@
     RESTORE_GOT
     pop         rbp
 %else
   %ifidn __OUTPUT_FORMAT__,x64
   %endif
 %endif
     ret
 %endmacro
 
 ;void vp8_short_fdct4x4_sse2(short *input, short *output, int pitch)
-global sym(vp8_short_fdct4x4_sse2)
+global sym(vp8_short_fdct4x4_sse2) PRIVATE
 sym(vp8_short_fdct4x4_sse2):
 
     STACK_FRAME_CREATE
 
     movq        xmm0, MMWORD PTR[input        ] ;03 02 01 00
     movq        xmm2, MMWORD PTR[input+  pitch] ;13 12 11 10
     lea         input,          [input+2*pitch]
     movq        xmm1, MMWORD PTR[input        ] ;23 22 21 20
     movq        xmm3, MMWORD PTR[input+  pitch] ;33 32 31 30
 
@@ skipping 84 matching lines @@
     paddw       xmm3, xmm2                      ;op[4] += (d1!=0)
     punpcklqdq  xmm0, xmm3                      ;op[4] op[0]
     punpckhqdq  xmm1, xmm3                      ;op[12] op[8]
 
     movdqa      XMMWORD PTR[output +  0], xmm0
     movdqa      XMMWORD PTR[output + 16], xmm1
 
     STACK_FRAME_DESTROY
 
 ;void vp8_short_fdct8x4_sse2(short *input, short *output, int pitch)
-global sym(vp8_short_fdct8x4_sse2)
+global sym(vp8_short_fdct8x4_sse2) PRIVATE
 sym(vp8_short_fdct8x4_sse2):
 
     STACK_FRAME_CREATE
 
         ; read the input data
         movdqa      xmm0,       [input        ]
         movdqa      xmm2,       [input+  pitch]
         lea         input,      [input+2*pitch]
         movdqa      xmm4,       [input        ]
         movdqa      xmm3,       [input+  pitch]
@@ skipping 243 matching lines @@
     times 4 dd 14500
 align 16
 _7500:
     times 4 dd 7500
 align 16
 _12000:
     times 4 dd 12000
 align 16
 _51000:
     times 4 dd 51000