fb_config.h

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#ifndef __FB_CONFIG_H__
#define __FB_CONFIG_H__

#if defined HOST_XBOX
#elif defined __DJGPP__
        #define HOST_DOS
        #define HOST_DJGPP
#elif defined __MINGW32__ /* MinGW, MinGW-w64, TDM-GCC */
        #define HOST_MINGW
        #define HOST_WIN32
        /* We prefer using non-oldnames functions, see also win32/fb_win32.h */
        #define NO_OLDNAMES
        #define _NO_OLDNAMES
        /* Tell windows.h to omit many headers we don't need */
        #define WIN32_LEAN_AND_MEAN
#elif defined __CYGWIN__
        #define HOST_CYGWIN
        #define HOST_WIN32
        #define WIN32_LEAN_AND_MEAN
#elif defined __linux__
        #define HOST_LINUX
        #define HOST_UNIX
#elif defined __FreeBSD__
        #define HOST_FREEBSD
        #define HOST_UNIX
#elif defined __NetBSD__
        #define HOST_NETBSD
        #define HOST_UNIX
#elif defined __OpenBSD__
        #define HOST_OPENBSD
        #define HOST_UNIX
#elif defined __APPLE__
        #define HOST_DARWIN
        #define HOST_UNIX
#elif (defined sun || defined __sun) && defined __SVR4
        #define HOST_SOLARIS
        #define HOST_UNIX
#else
        #error "Couldn't identify target system!"
#endif

#ifdef HOST_UNIX
        /* Map off_t/fopen/fseeko/etc. to their 64bit versions */
        #define _FILE_OFFSET_BITS 64
#endif

#if defined __i386__
        #define HOST_X86
#elif defined __x86_64__
        #define HOST_X86_64
        #define HOST_64BIT
#elif defined __sparc__
        #ifdef __LP64__
                #define HOST_64BIT
        #endif
#elif defined __ppc64__
        #define HOST_64BIT
#endif

#ifdef HOST_MINGW
        /* work around gcc bug 52991 */
        /* Since MinGW gcc 4.7, structs default to "ms_struct" instead of
           "gcc_struct" as on Linux, and it seems like "packed" is broken in
           combination with "ms_struct", so it's necessary to specify
           "gcc_struct" explicitly. "gcc_struct" isn't recognized on all gcc
           targets though, so we can't use it *all* the time. Thus we use it
           only for MinGW (both 32bit and 64bit). */
        #define FBPACKED __attribute__((gcc_struct, packed))
#else
        #define FBPACKED __attribute__((packed))
#endif

#endif