include/begin_code.h
author Sam Lantinga <slouken@libsdl.org>
Sun, 20 Oct 2013 21:56:15 -0700
changeset 7860 2b0bcdea3a79
parent 7771 4434498bf4b9
child 7872 ca36ab2a8179
permissions -rw-r--r--
Fixed bug 2129 - fix for bug 2121 breaks linking for mingw and throws multiple warnings

Andreas Ertelt

The problem in question is caused by changeset 7771 (http://hg.libsdl.org/SDL/rev/4434498bf4b9 / https://bugzilla.libsdl.org/show_bug.cgi?id=2121)

The redefinition of __inline__ (introduced by the addition of begin_code.h:128's "|| __STRICT_ANSI__") results in mingw's gcc throwing multiple

warning: always_inline function might not be inlinable [-Wattributes]

as well as a whole bunch of redefinitions of mingw internals which break linking of projects including the SDL2 headers.
     1 /*
     2   Simple DirectMedia Layer
     3   Copyright (C) 1997-2013 Sam Lantinga <slouken@libsdl.org>
     4 
     5   This software is provided 'as-is', without any express or implied
     6   warranty.  In no event will the authors be held liable for any damages
     7   arising from the use of this software.
     8 
     9   Permission is granted to anyone to use this software for any purpose,
    10   including commercial applications, and to alter it and redistribute it
    11   freely, subject to the following restrictions:
    12 
    13   1. The origin of this software must not be misrepresented; you must not
    14      claim that you wrote the original software. If you use this software
    15      in a product, an acknowledgment in the product documentation would be
    16      appreciated but is not required.
    17   2. Altered source versions must be plainly marked as such, and must not be
    18      misrepresented as being the original software.
    19   3. This notice may not be removed or altered from any source distribution.
    20 */
    21 
    22 /**
    23  *  \file begin_code.h
    24  *
    25  *  This file sets things up for C dynamic library function definitions,
    26  *  static inlined functions, and structures aligned at 4-byte alignment.
    27  *  If you don't like ugly C preprocessor code, don't look at this file. :)
    28  */
    29 
    30 /* This shouldn't be nested -- included it around code only. */
    31 #ifdef _begin_code_h
    32 #error Nested inclusion of begin_code.h
    33 #endif
    34 #define _begin_code_h
    35 
    36 #ifndef SDL_DEPRECATED
    37 #  if (__GNUC__ >= 4)  /* technically, this arrived in gcc 3.1, but oh well. */
    38 #    define SDL_DEPRECATED __attribute__((deprecated))
    39 #  else
    40 #    define SDL_DEPRECATED
    41 #  endif
    42 #endif
    43 
    44 /* Some compilers use a special export keyword */
    45 #ifndef DECLSPEC
    46 # if defined(__WIN32__)
    47 #  ifdef __BORLANDC__
    48 #   ifdef BUILD_SDL
    49 #    define DECLSPEC
    50 #   else
    51 #    define DECLSPEC    __declspec(dllimport)
    52 #   endif
    53 #  else
    54 #   define DECLSPEC __declspec(dllexport)
    55 #  endif
    56 # else
    57 #  if defined(__GNUC__) && __GNUC__ >= 4
    58 #   define DECLSPEC __attribute__ ((visibility("default")))
    59 #  elif defined(__GNUC__) && __GNUC__ >= 2
    60 #   define DECLSPEC __declspec(dllexport)
    61 #  else
    62 #   define DECLSPEC
    63 #  endif
    64 # endif
    65 #endif
    66 
    67 /* By default SDL uses the C calling convention */
    68 #ifndef SDLCALL
    69 #if defined(__WIN32__) && !defined(__GNUC__)
    70 #define SDLCALL __cdecl
    71 #else
    72 #define SDLCALL
    73 #endif
    74 #endif /* SDLCALL */
    75 
    76 /* Removed DECLSPEC on Symbian OS because SDL cannot be a DLL in EPOC */
    77 #ifdef __SYMBIAN32__
    78 #undef DECLSPEC
    79 #define DECLSPEC
    80 #endif /* __SYMBIAN32__ */
    81 
    82 /* Force structure packing at 4 byte alignment.
    83    This is necessary if the header is included in code which has structure
    84    packing set to an alternate value, say for loading structures from disk.
    85    The packing is reset to the previous value in close_code.h
    86  */
    87 #if defined(_MSC_VER) || defined(__MWERKS__) || defined(__BORLANDC__)
    88 #ifdef _MSC_VER
    89 #pragma warning(disable: 4103)
    90 #endif
    91 #ifdef __BORLANDC__
    92 #pragma nopackwarning
    93 #endif
    94 #ifdef _M_X64
    95 /* Use 8-byte alignment on 64-bit architectures, so pointers are aligned */
    96 #pragma pack(push,8)
    97 #else
    98 #pragma pack(push,4)
    99 #endif
   100 #endif /* Compiler needs structure packing set */
   101 
   102 #ifndef SDL_INLINE
   103 /* Set up compiler-specific options for inlining functions */
   104 #if defined(_MSC_VER) || defined(__BORLANDC__) || \
   105     defined(__DMC__) || defined(__SC__) || \
   106     defined(__WATCOMC__) || defined(__LCC__) || \
   107     defined(__DECC)
   108 #define SDL_INLINE  __inline
   109 #else
   110 #define SDL_INLINE inline
   111 #endif /* Visual C++ */
   112 #endif /* SDL_INLINE not defined */
   113 
   114 /* If inlining isn't supported, remove SDL_INLINE, turning static
   115    inlined functions into static functions (potentially resulting in
   116    code bloat in all files which include the offending header files)
   117 */
   118 #if __STRICT_ANSI__
   119 #undef SDL_INLINE
   120 #define SDL_INLINE
   121 #endif
   122 
   123 #ifndef SDL_FORCE_INLINE
   124 #if defined(_MSC_VER)
   125 #define SDL_FORCE_INLINE __forceinline
   126 #elif ( (defined(__GNUC__) && (__GNUC__ >= 4)) || defined(__clang__) )
   127 #define SDL_FORCE_INLINE __attribute__((always_inline)) static SDL_INLINE
   128 #else
   129 #define SDL_FORCE_INLINE static SDL_INLINE
   130 #endif
   131 #endif /* SDL_FORCE_INLINE not defined */
   132 
   133 /* Apparently this is needed by several Windows compilers */
   134 #if !defined(__MACH__)
   135 #ifndef NULL
   136 #ifdef __cplusplus
   137 #define NULL 0
   138 #else
   139 #define NULL ((void *)0)
   140 #endif
   141 #endif /* NULL */
   142 #endif /* ! Mac OS X - breaks precompiled headers */