src/cc-compat.h

   1 /*
   2  * Copyright (C) 2009-2011 the libgit2 contributors
   3  *
   4  * This file is part of libgit2, distributed under the GNU GPL v2 with
   5  * a Linking Exception. For full terms see the included COPYING file.
   6  */
   7 #ifndef INCLUDE_compat_h__
   8 #define INCLUDE_compat_h__
   9
  10 /*
  11  * See if our compiler is known to support flexible array members.
  12  */
  13 #ifndef GIT_FLEX_ARRAY
  14 # if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)
  15 #       define GIT_FLEX_ARRAY /* empty */
  16 # elif defined(__GNUC__)
  17 #       if (__GNUC__ >= 3)
  18 #       define GIT_FLEX_ARRAY /* empty */
  19 #       else
  20 #       define GIT_FLEX_ARRAY 0 /* older GNU extension */
  21 #       endif
  22 # endif
  23
  24 /* Default to safer but a bit wasteful traditional style */
  25 # ifndef GIT_FLEX_ARRAY
  26 #       define GIT_FLEX_ARRAY 1
  27 # endif
  28 #endif
  29
  30 #ifdef __GNUC__
  31 # define GIT_TYPEOF(x) (__typeof__(x))
  32 #else
  33 # define GIT_TYPEOF(x)
  34 #endif
  35
  36 #ifdef __cplusplus
  37 # define GIT_UNUSED(x)
  38 #else
  39 # ifdef __GNUC__
  40 #       define GIT_UNUSED(x) x __attribute__ ((__unused__))
  41 # else
  42 #       define GIT_UNUSED(x) x
  43 # endif
  44 #endif
  45
  46 #if defined(_MSC_VER)
  47 #define GIT_UNUSED_ARG(x) ((void)(x)); /* note trailing ; */
  48 #else
  49 #define GIT_UNUSED_ARG(x)
  50 #endif
  51
  52 /*
  53  * Does our compiler/platform support the C99 <inttypes.h> and
  54  * <stdint.h> header files. (C99 requires that <inttypes.h>
  55  * includes <stdint.h>).
  56  */
  57 #if !defined(_MSC_VER)
  58 # define GIT_HAVE_INTTYPES_H 1
  59 #endif
  60
  61 /* Define the printf format specifer to use for size_t output */
  62 #if defined(_MSC_VER) || defined(__MINGW32__)
  63 # define PRIuZ "Iu"
  64 #else
  65 # define PRIuZ "zu"
  66 #endif
  67
  68 /* Micosoft Visual C/C++ */
  69 #if defined(_MSC_VER)
  70 /* disable "deprecated function" warnings */
  71 # pragma warning ( disable : 4996 )
  72 /* disable "conditional expression is constant" level 4 warnings */
  73 # pragma warning ( disable : 4127 )
  74 #endif
  75
  76 #endif /* INCLUDE_compat_h__ */