include/_ansi.h

   1 /* Provide support for both ANSI and non-ANSI environments.  */
   2
   3 /* Some ANSI environments are "broken" in the sense that __STDC__ cannot be
   4    relied upon to have it's intended meaning.  Therefore we must use our own
   5    concoction: _HAVE_STDC.  Always use _HAVE_STDC instead of __STDC__ in newlib
   6    sources!
   7
   8    To get a strict ANSI C environment, define macro __STRICT_ANSI__.  This will
   9    "comment out" the non-ANSI parts of the ANSI header files (non-ANSI header
  10    files aren't affected).  */
  11
  12 #ifndef _ANSIDECL_H_
  13 #define _ANSIDECL_H_
  14
  15 #include <sys/config.h>
  16
  17 /* First try to figure out whether we really are in an ANSI C environment.  */
  18 /* FIXME: This probably needs some work.  Perhaps sys/config.h can be
  19    prevailed upon to give us a clue.  */
  20
  21 #ifdef __STDC__
  22 #define _HAVE_STDC
  23 #endif
  24
  25 #ifdef _HAVE_STDC
  26 #define _PTR            void *
  27 #define _AND            ,
  28 #define _NOARGS         void
  29 #define _CONST          const
  30 #define _VOLATILE       volatile
  31 #define _SIGNED         signed
  32 #define _DOTS           , ...
  33 #define _VOID void
  34 #if defined (__CYGWIN__) || defined (__MSYS__)
  35 #define _EXFUN(name, proto)             __cdecl name proto
  36 #define _EXPARM(name, proto)            (* __cdecl name) proto
  37 #else
  38 #define _EXFUN(name, proto)             name proto
  39 #define _EXPARM(name, proto)            (* name) proto
  40 #endif
  41 #define _DEFUN(name, arglist, args)     name(args)
  42 #define _DEFUN_VOID(name)               name(_NOARGS)
  43 #define _CAST_VOID (void)
  44 #ifndef _LONG_DOUBLE
  45 #define _LONG_DOUBLE long double
  46 #endif
  47 #ifndef _PARAMS
  48 #define _PARAMS(paramlist)              paramlist
  49 #endif
  50 #else
  51 #define _PTR            char *
  52 #define _AND            ;
  53 #define _NOARGS
  54 #define _CONST
  55 #define _VOLATILE
  56 #define _SIGNED
  57 #define _DOTS
  58 #define _VOID void
  59 #define _EXFUN(name, proto)             name()
  60 #define _DEFUN(name, arglist, args)     name arglist args;
  61 #define _DEFUN_VOID(name)               name()
  62 #define _CAST_VOID
  63 #define _LONG_DOUBLE double
  64 #ifndef _PARAMS
  65 #define _PARAMS(paramlist)              ()
  66 #endif
  67 #endif
  68
  69 /* Support gcc's __attribute__ facility.  */
  70
  71 #ifdef __GNUC__
  72 #define _ATTRIBUTE(attrs) __attribute__ (attrs)
  73 #else
  74 #define _ATTRIBUTE(attrs)
  75 #endif
  76
  77 #endif /* _ANSIDECL_H_ */