src/cc-compat.h

   1 /*
   2  * cc-compat.h - C compiler compat macros for internal use
   3  */
   4 #ifndef INCLUDE_compat_h__
   5 #define INCLUDE_compat_h__
   6
   7 /*
   8  * See if our compiler is known to support flexible array members.
   9  */
  10 #ifndef GIT_FLEX_ARRAY
  11 # if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)
  12 #  define GIT_FLEX_ARRAY /* empty */
  13 # elif defined(__GNUC__)
  14 #  if (__GNUC__ >= 3)
  15 #   define GIT_FLEX_ARRAY /* empty */
  16 #  else
  17 #   define GIT_FLEX_ARRAY 0 /* older GNU extension */
  18 #  endif
  19 # endif
  20
  21 /* Default to safer but a bit wasteful traditional style */
  22 # ifndef GIT_FLEX_ARRAY
  23 #  define GIT_FLEX_ARRAY 1
  24 # endif
  25 #endif
  26
  27 #ifdef __GNUC__
  28 # define GIT_TYPEOF(x) (__typeof__(x))
  29 #else
  30 # define GIT_TYPEOF(x)
  31 #endif
  32
  33 #ifdef __cplusplus
  34 # define GIT_UNUSED(x)
  35 #else
  36 # ifdef __GNUC__
  37 #  define GIT_UNUSED(x) x __attribute__ ((__unused__))
  38 # else
  39 #  define GIT_UNUSED(x) x
  40 # endif
  41 #endif
  42
  43 #if defined(_MSC_VER)
  44 #define GIT_UNUSED_ARG(x) ((void)(x)); /* note trailing ; */
  45 #else
  46 #define GIT_UNUSED_ARG(x)
  47 #endif
  48
  49 /*
  50  * Does our compiler/platform support the C99 <inttypes.h> and
  51  * <stdint.h> header files. (C99 requires that <inttypes.h>
  52  * includes <stdint.h>).
  53  */
  54 #if !defined(_MSC_VER)
  55 # define GIT_HAVE_INTTYPES_H 1
  56 #endif
  57
  58 /* Define the printf format specifer to use for size_t output */
  59 #if defined(_MSC_VER) || defined(__MINGW32__)
  60 # define PRIuZ "Iu"
  61 #else
  62 # define PRIuZ "zu"
  63 #endif
  64
  65 /* Micosoft Visual C/C++ */
  66 #if defined(_MSC_VER)
  67 /* disable "deprecated function" warnings */
  68 # pragma warning ( disable : 4996 )
  69 /* disable "conditional expression is constant" level 4 warnings */
  70 # pragma warning ( disable : 4127 )
  71 #endif
  72
  73 #endif /* INCLUDE_compat_h__ */