/*
 * Name:        wx/compiler.h
 * Purpose:     Compiler-specific macro definitions.
 * Author:      Vadim Zeitlin
 * Created:     2013-07-13 (extracted from wx/platform.h)
 * Copyright:   (c) 1997-2013 Vadim Zeitlin <vadim@wxwidgets.org>
 * Licence:     wxWindows licence
 */

/* THIS IS A C FILE, DON'T USE C++ FEATURES (IN PARTICULAR COMMENTS) IN IT */

#ifndef _WX_COMPILER_H_
#define _WX_COMPILER_H_

/*
    Compiler detection and related helpers.
 */

/*
    Notice that Intel compiler can be used as Microsoft Visual C++ add-on and
    so we should define both __INTELC__ and __VISUALC__ for it.
*/
#ifdef __INTEL_COMPILER
#   define __INTELC__
#endif

#if defined(_MSC_VER)
    /*
       define another standard symbol for Microsoft Visual C++: the standard
       one (_MSC_VER) is also defined by some other compilers.
     */
#   define __VISUALC__ _MSC_VER

    /*
      define special symbols for different VC version instead of writing tests
      for magic numbers such as 1200, 1300 &c repeatedly
    */
#if __VISUALC__ < 1900
#   error "This Visual C++ version is not supported any longer (at least MSVC 2015 required)."
#elif __VISUALC__ < 2000
    /* There is no __VISUALC13__! */
#   define __VISUALC14__
#else
    /*
        Don't forget to update include/msvc/wx/setup.h as well when adding
        support for a newer MSVC version here.
     */
#   pragma message("Please update wx/compiler.h to recognize this VC++ version")
#endif

#elif defined(__SUNPRO_CC)
#   ifndef __SUNCC__
#       define __SUNCC__ __SUNPRO_CC
#   endif /* Sun CC */
#endif  /* compiler */

/*
   Macros for checking compiler version.
*/

/*
   This macro can be used to test the gcc version and can be used like this:

#    if wxCHECK_GCC_VERSION(3, 1)
        ... we have gcc 3.1 or later ...
#    else
        ... no gcc at all or gcc < 3.1 ...
#    endif
*/
#if defined(__GNUC__) && defined(__GNUC_MINOR__)
    #define wxCHECK_GCC_VERSION( major, minor ) \
        ( ( __GNUC__ > (major) ) \
            || ( __GNUC__ == (major) && __GNUC_MINOR__ >= (minor) ) )

    /*
        clang predefines __GNUC__ and __GNUC_MINOR__ as 4 and 6, don't give an
        error below for it.
     */
    #if defined(__clang__)
        #if __clang_major__ < 3 || (__clang_major__ == 3 && __clang_minor__ < 4)
            #error "This clang version is not supported any longer (at least clang 3.4 required)."
        #endif
    #else
        #if !wxCHECK_GCC_VERSION(4, 8)
            #error "This gcc version is not supported any longer (at least gcc 4.8 required, gcc 6 or later recommended)."
        #endif

        /* Define a special symbol used to work around 4.8 problems. */
        #if __GNUC__ == 4 && __GNUC_MINOR__ == 8
            #define wxGCC_4_8
        #endif
    #endif
#else
    #define wxCHECK_GCC_VERSION( major, minor ) 0
#endif

/*
   This macro can be used to test the Visual C++ version.
*/
#ifndef __VISUALC__
#   define wxVISUALC_VERSION(major) 0
#   define wxCHECK_VISUALC_VERSION(major) 0
#else
    /*
        Things used to be simple with the _MSC_VER value and the version number
        increasing in lock step, but _MSC_VER value of 1900 is VC14 and not the
        non existing (presumably for the superstitious reasons) VC13, so we now
        need to account for this with an extra offset.
     */
#   define wxVISUALC_VERSION(major) ( (6 - (major >= 14 ? 1 : 0) + major) * 100 )
#   define wxCHECK_VISUALC_VERSION(major) ( __VISUALC__ >= wxVISUALC_VERSION(major) )
#endif

/**
    This is similar to wxCHECK_GCC_VERSION but for Sun CC compiler.
 */
#ifdef __SUNCC__
    /*
       __SUNCC__ is 0xVRP where V is major version, R release and P patch level
     */
    #define wxCHECK_SUNCC_VERSION(maj, min) (__SUNCC__ >= (((maj)<<8) | ((min)<<4)))
#else
    #define wxCHECK_SUNCC_VERSION(maj, min) (0)
#endif

/*
    wxCHECK_MINGW32_VERSION() is defined in wx/msw/gccpriv.h which is included
    later, see comments there.
 */

#endif // _WX_COMPILER_H_
