JPEG_DECODE_ONLY macro reintroduced to allow just the decode functions to be linked in

simd/jsimd_x86_64.c

Index: simd/jsimd_x86_64.c
===================================================================
--- simd/jsimd_x86_64.c	(revision 118072)
+++ simd/jsimd_x86_64.c	(working copy)
@@ -3,7 +3,7 @@
  *
  * Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB
  * Copyright 2009-2011 D. R. Commander
- * 
+ *
  * Based on the x86 SIMD extension for IJG JPEG library,
  * Copyright (C) 1999-2006, MIYASAKA Masaru.
  * For conditions of distribution and use, see copyright notice in jsimdext.inc
@@ -29,6 +29,7 @@
 
 #define IS_ALIGNED_SSE(ptr) (IS_ALIGNED(ptr, 4)) /* 16 byte alignment */
 
+#ifndef JPEG_DECODE_ONLY
 GLOBAL(int)
 jsimd_can_rgb_ycc (void)
 {
@@ -45,6 +46,7 @@
 
   return 1;
 }
+#endif
 
 GLOBAL(int)
 jsimd_can_rgb_gray (void)
@@ -80,6 +82,7 @@
   return 1;
 }
 
+#ifndef JPEG_DECODE_ONLY
 GLOBAL(void)
 jsimd_rgb_ycc_convert (j_compress_ptr cinfo,
                        JSAMPARRAY input_buf, JSAMPIMAGE output_buf,
@@ -118,6 +121,7 @@
 
   sse2fct(cinfo->image_width, input_buf, output_buf, output_row, num_rows);
 }
+#endif
 
 GLOBAL(void)
 jsimd_rgb_gray_convert (j_compress_ptr cinfo,
@@ -197,6 +201,7 @@
   sse2fct(cinfo->output_width, input_buf, input_row, output_buf, num_rows);
 }
 
+#ifndef JPEG_DECODE_ONLY
 GLOBAL(int)
 jsimd_can_h2v2_downsample (void)
 {
@@ -242,6 +247,7 @@
                              compptr->width_in_blocks,
                              input_data, output_data);
 }
+#endif
 
 GLOBAL(int)
 jsimd_can_h2v2_upsample (void)
@@ -269,7 +275,7 @@
 
 GLOBAL(void)
 jsimd_h2v2_upsample (j_decompress_ptr cinfo,
-                     jpeg_component_info * compptr, 
+                     jpeg_component_info * compptr,
                      JSAMPARRAY input_data,
                      JSAMPARRAY * output_data_ptr)
 {
@@ -280,7 +286,7 @@
 
 GLOBAL(void)
 jsimd_h2v1_upsample (j_decompress_ptr cinfo,
-                     jpeg_component_info * compptr, 
+                     jpeg_component_info * compptr,
                      JSAMPARRAY input_data,
                      JSAMPARRAY * output_data_ptr)
 {
@@ -321,7 +327,7 @@
 
 GLOBAL(void)
 jsimd_h2v2_fancy_upsample (j_decompress_ptr cinfo,
-                           jpeg_component_info * compptr, 
+                           jpeg_component_info * compptr,
                            JSAMPARRAY input_data,
                            JSAMPARRAY * output_data_ptr)
 {
@@ -332,7 +338,7 @@
 
 GLOBAL(void)
 jsimd_h2v1_fancy_upsample (j_decompress_ptr cinfo,
-                           jpeg_component_info * compptr, 
+                           jpeg_component_info * compptr,
                            JSAMPARRAY input_data,
                            JSAMPARRAY * output_data_ptr)
 {
@@ -451,6 +457,7 @@
   sse2fct(cinfo->output_width, input_buf, in_row_group_ctr, output_buf);
 }
 
+#ifndef JPEG_DECODE_ONLY
 GLOBAL(int)
 jsimd_can_convsamp (void)
 {
@@ -601,6 +608,7 @@
 {
   jsimd_quantize_float_sse2(coef_block, divisors, workspace);
 }
+#endif
 
 GLOBAL(int)
 jsimd_can_idct_2x2 (void)