libpng/patches/libpng-1.4.2-pngconf.patch

   1 diff -Nur a/pngconf.h b/pngconf.h
   2 --- a/pngconf.h 2010-05-06 12:30:09.000000000 +0200
   3 +++ b/pngconf.h 2010-05-09 13:19:16.000000000 +0200
   4 @@ -35,6 +35,25 @@
   5  #  ifdef HAVE_CONFIG_H
   6  #    include "config.h"
   7  #  endif
   8 +# else
   9 +/* pngconf.h is part of the exported API. When a libpng-using application
  10 +   includes us, PNG_CONFIGURE_LIBPNG is of course not defined as we do not have
  11 +   libpng's config.h available in this case. This means that we do not have the
  12 +   defines added to config.h and the commandline by libpng's ./configure .
  13 +
  14 +   For all defines from config.h not having them set is not a problem, however
  15 +   ./configure also adds -DPNG_NO_ASSEMBLER_CODE to the CFLAGS when compiling
  16 +   on a platform on which the MMX and SSE asm code in libpng is not supported.
  17 +
  18 +   We do need this define as this define is used to determine whether or not
  19 +   to define PNG_ASSEMBLER_CODE_SUPPORTED and other assembler related defines
  20 +   and prototypes. PNG_ASSEMBLER_CODE_SUPPORTED in turn is used by applications
  21 +   (ImageMagick for example) to determine whether or not they can use the asm
  22 +   functions. Thus we need to define PNG_NO_ASSEMBLER_CODE here on platforms
  23 +   on which the MMX and SSE asm code in libpng is not supported: */
  24 +#  ifndef __i386__ /* change this if MMX/SSE become supported on x86_64! */
  25 +#  define PNG_NO_ASSEMBLER_CODE
  26 +# endif
  27  #endif
  28
  29  /*