We use __CHAR_UNSIGNED__ (automatically defined by the AC_C_CHAR_UNSIGNED macro) rather than CHAR_IS_UNSIGNED (defined by custom autoconf code in libjpeg that we didn't port over), although I doubt it matters on any of the platforms we support.

git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/branches/1.3.x@1264 632fc199-4ca6-4c93-a231-07263d6284db

jconfig.txt

@@ -48,7 +48,7 @@
  * If you're not sure, leaving it undefined will work at some cost in speed.
  * If you defined HAVE_UNSIGNED_CHAR then the speed difference is minimal.
  */
-#undef CHAR_IS_UNSIGNED
+#undef __CHAR_UNSIGNED__
 
 /* Define this if your system has an ANSI-conforming <stddef.h> file.
  */

rdbmp.c

@@ -35,7 +35,7 @@
 typedef unsigned char U_CHAR;
 #define UCH(x)	((int) (x))
 #else /* !HAVE_UNSIGNED_CHAR */
-#ifdef CHAR_IS_UNSIGNED
+#ifdef __CHAR_UNSIGNED__
 typedef char U_CHAR;
 #define UCH(x)	((int) (x))
 #else

rdppm.c

@@ -43,7 +43,7 @@
 typedef unsigned char U_CHAR;
 #define UCH(x)	((int) (x))
 #else /* !HAVE_UNSIGNED_CHAR */
-#ifdef CHAR_IS_UNSIGNED
+#ifdef __CHAR_UNSIGNED__
 typedef char U_CHAR;
 #define UCH(x)	((int) (x))
 #else

rdtarga.c

@@ -28,7 +28,7 @@
 typedef unsigned char U_CHAR;
 #define UCH(x)	((int) (x))
 #else /* !HAVE_UNSIGNED_CHAR */
-#ifdef CHAR_IS_UNSIGNED
+#ifdef __CHAR_UNSIGNED__
 typedef char U_CHAR;
 #define UCH(x)	((int) (x))
 #else
@@ -177,7 +177,7 @@ get_8bit_gray_row (j_compress_ptr cinfo, cjpeg_source_ptr sinfo)
   tga_source_ptr source = (tga_source_ptr) sinfo;
   register JSAMPROW ptr;
   register JDIMENSION col;
-  
+
   ptr = source->pub.buffer[0];
   for (col = cinfo->image_width; col > 0; col--) {
     (*source->read_pixel) (source); /* Load next pixel into tga_pixel */
@@ -215,7 +215,7 @@ get_16bit_row (j_compress_ptr cinfo, cjpeg_source_ptr sinfo)
   register int t;
   register JSAMPROW ptr;
   register JDIMENSION col;
-  
+
   ptr = source->pub.buffer[0];
   for (col = cinfo->image_width; col > 0; col--) {
     (*source->read_pixel) (source); /* Load next pixel into tga_pixel */
@@ -242,7 +242,7 @@ get_24bit_row (j_compress_ptr cinfo, cjpeg_source_ptr sinfo)
   tga_source_ptr source = (tga_source_ptr) sinfo;
   register JSAMPROW ptr;
   register JDIMENSION col;
-  
+
   ptr = source->pub.buffer[0];
   for (col = cinfo->image_width; col > 0; col--) {
     (*source->read_pixel) (source); /* Load next pixel into tga_pixel */
@@ -365,7 +365,7 @@ start_input_tga (j_compress_ptr cinfo, cjpeg_source_ptr sinfo)
       (UCH(targaheader[16]) & 7) != 0 || /* bits/pixel must be multiple of 8 */
       interlace_type != 0)	/* currently don't allow interlaced image */
     ERREXIT(cinfo, JERR_TGA_BADPARMS);
-  
+
   if (subtype > 8) {
     /* It's an RLE-coded file */
     source->read_pixel = read_rle_pixel;
@@ -440,7 +440,7 @@ start_input_tga (j_compress_ptr cinfo, cjpeg_source_ptr sinfo)
     source->pub.buffer_height = 1;
     source->pub.get_pixel_rows = source->get_pixel_rows;
   }
-  
+
   while (idlen--)		/* Throw away ID field */
     (void) read_byte(source);
 

win/jconfig.h.in

@@ -12,7 +12,7 @@
 #define HAVE_UNSIGNED_SHORT
 /* #define void char */
 /* #define const */
-#undef CHAR_IS_UNSIGNED
+#undef __CHAR_UNSIGNED__
 #define HAVE_STDDEF_H
 #define HAVE_STDLIB_H
 #undef NEED_BSD_STRINGS