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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 1693 | serge | 1 | /* Provide support for both ANSI and non-ANSI environments. */ |
| 2 | |||
| 3 | /* Some ANSI environments are "broken" in the sense that __STDC__ cannot be |
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| 4 | relied upon to have it's intended meaning. Therefore we must use our own |
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| 5 | concoction: _HAVE_STDC. Always use _HAVE_STDC instead of __STDC__ in newlib |
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| 6 | sources! |
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| 7 | |||
| 8 | To get a strict ANSI C environment, define macro __STRICT_ANSI__. This will |
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| 9 | "comment out" the non-ANSI parts of the ANSI header files (non-ANSI header |
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| 10 | files aren't affected). */ |
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| 11 | |||
| 12 | #ifndef _ANSIDECL_H_ |
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| 13 | #define _ANSIDECL_H_ |
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| 14 | |||
| 15 | #include |
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| 16 | #include |
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| 17 | |||
| 18 | /* First try to figure out whether we really are in an ANSI C environment. */ |
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| 19 | /* FIXME: This probably needs some work. Perhaps sys/config.h can be |
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| 20 | prevailed upon to give us a clue. */ |
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| 21 | |||
| 22 | #ifdef __STDC__ |
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| 23 | #define _HAVE_STDC |
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| 24 | #endif |
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| 25 | |||
| 26 | /* ISO C++. */ |
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| 27 | |||
| 28 | #ifdef __cplusplus |
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| 29 | #if !(defined(_BEGIN_STD_C) && defined(_END_STD_C)) |
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| 30 | #ifdef _HAVE_STD_CXX |
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| 31 | #define _BEGIN_STD_C namespace std { extern "C" { |
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| 32 | #define _END_STD_C } } |
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| 33 | #else |
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| 34 | #define _BEGIN_STD_C extern "C" { |
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| 35 | #define _END_STD_C } |
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| 36 | #endif |
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| 37 | #if defined(__GNUC__) && \ |
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| 38 | ( (__GNUC__ >= 4) || \ |
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| 39 | ( (__GNUC__ >= 3) && defined(__GNUC_MINOR__) && (__GNUC_MINOR__ >= 3) ) ) |
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| 40 | #define _NOTHROW __attribute__ ((nothrow)) |
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| 41 | #else |
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| 42 | #define _NOTHROW throw() |
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| 43 | #endif |
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| 44 | #endif |
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| 45 | #else |
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| 46 | #define _BEGIN_STD_C |
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| 47 | #define _END_STD_C |
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| 48 | #define _NOTHROW |
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| 49 | #endif |
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| 50 | |||
| 51 | #ifdef _HAVE_STDC |
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| 52 | #define _PTR void * |
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| 53 | #define _AND , |
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| 54 | #define _NOARGS void |
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| 55 | #define _CONST const |
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| 56 | #define _VOLATILE volatile |
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| 57 | #define _SIGNED signed |
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| 58 | #define _DOTS , ... |
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| 59 | #define _VOID void |
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| 60 | #ifdef __CYGWIN__ |
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| 61 | #define _EXFUN_NOTHROW(name, proto) __cdecl name proto _NOTHROW |
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| 62 | #define _EXFUN(name, proto) __cdecl name proto |
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| 63 | #define _EXPARM(name, proto) (* __cdecl name) proto |
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| 64 | #define _EXFNPTR(name, proto) (__cdecl * name) proto |
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| 65 | #else |
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| 66 | #define _EXFUN_NOTHROW(name, proto) name proto _NOTHROW |
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| 67 | #define _EXFUN(name, proto) name proto |
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| 68 | #define _EXPARM(name, proto) (* name) proto |
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| 69 | #define _EXFNPTR(name, proto) (* name) proto |
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| 70 | #endif |
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| 71 | #define _DEFUN(name, arglist, args) name(args) |
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| 72 | #define _DEFUN_VOID(name) name(_NOARGS) |
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| 73 | #define _CAST_VOID (void) |
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| 74 | #ifndef _LONG_DOUBLE |
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| 75 | #define _LONG_DOUBLE long double |
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| 76 | #endif |
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| 77 | #ifndef _LONG_LONG_TYPE |
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| 78 | #define _LONG_LONG_TYPE long long |
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| 79 | #endif |
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| 80 | #ifndef _PARAMS |
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| 81 | #define _PARAMS(paramlist) paramlist |
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| 82 | #endif |
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| 83 | #else |
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| 84 | #define _PTR char * |
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| 85 | #define _AND ; |
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| 86 | #define _NOARGS |
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| 87 | #define _CONST |
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| 88 | #define _VOLATILE |
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| 89 | #define _SIGNED |
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| 90 | #define _DOTS |
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| 91 | #define _VOID void |
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| 92 | #define _EXFUN(name, proto) name() |
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| 93 | #define _EXFUN_NOTHROW(name, proto) name() |
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| 94 | #define _DEFUN(name, arglist, args) name arglist args; |
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| 95 | #define _DEFUN_VOID(name) name() |
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| 96 | #define _CAST_VOID |
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| 97 | #define _LONG_DOUBLE double |
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| 98 | #define _LONG_LONG_TYPE long |
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| 99 | #ifndef _PARAMS |
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| 100 | #define _PARAMS(paramlist) () |
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| 101 | #endif |
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| 102 | #endif |
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| 103 | |||
| 104 | /* Support gcc's __attribute__ facility. */ |
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| 105 | |||
| 106 | #ifdef __GNUC__ |
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| 107 | #define _ATTRIBUTE(attrs) __attribute__ (attrs) |
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| 108 | #else |
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| 109 | #define _ATTRIBUTE(attrs) |
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| 110 | #endif |
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| 111 | |||
| 112 | /* The traditional meaning of 'extern inline' for GCC is not |
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| 113 | to emit the function body unless the address is explicitly |
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| 114 | taken. However this behaviour is changing to match the C99 |
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| 115 | standard, which uses 'extern inline' to indicate that the |
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| 116 | function body *must* be emitted. If we are using GCC, but do |
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| 117 | not have the new behaviour, we need to use extern inline; if |
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| 118 | we are using a new GCC with the C99-compatible behaviour, or |
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| 119 | a non-GCC compiler (which we will have to hope is C99, since |
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| 120 | there is no other way to achieve the effect of omitting the |
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| 121 | function if it isn't referenced) we just use plain 'inline', |
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| 122 | which c99 defines to mean more-or-less the same as the Gnu C |
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| 123 | 'extern inline'. */ |
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| 124 | #if defined(__GNUC__) && !defined(__GNUC_STDC_INLINE__) |
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| 125 | /* We're using GCC, but without the new C99-compatible behaviour. */ |
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| 126 | #define _ELIDABLE_INLINE extern __inline__ _ATTRIBUTE ((__always_inline__)) |
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| 127 | #else |
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| 128 | /* We're using GCC in C99 mode, or an unknown compiler which |
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| 129 | we just have to hope obeys the C99 semantics of inline. */ |
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| 130 | #define _ELIDABLE_INLINE __inline__ |
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| 131 | #endif |
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| 132 | |||
| 133 | #endif /* _ANSIDECL_H_ */ |