1 Prevent:

     2 error: #error "Compiler or options invalid for pre-UNIX 03 X/Open applications  and pre-2001 POSIX applications

     3 

     4 --- comm-esr31/mozilla/media/libpng/pngpriv.h.orig	2015-06-04 13:00:52.516503541 -0700

     5 +++ comm-esr31/mozilla/media/libpng/pngpriv.h	2015-06-04 13:00:52.515657420 -0700

     6 @@ -39,6 +39,8 @@

     7   */

     8  #define _POSIX_SOURCE 1 /* Just the POSIX 1003.1 and C89 APIs */

     9  

    10 +#define _XOPEN_SOURCE 600

    11 +

    12  #ifndef PNG_VERSION_INFO_ONLY

    13  /* Standard library headers not required by png.h: */

    14  #  include <stdlib.h>