compiler

/*
Copyright (C) 2018-2024 Geoffrey Daniels. https://gpdaniels.com/

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, version 3 of the License only.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <https://www.gnu.org/licenses/>.
*/

#pragma once
#ifndef GTL_PLATFORM_COMPILER_HPP
#define GTL_PLATFORM_COMPILER_HPP

// Summary: Macros and helper function to get the compiler used for the build.

#define GTL_PLATFORM_COMPILER_APPLE_CLANG 0
#define GTL_PLATFORM_COMPILER_CLANG 0
#define GTL_PLATFORM_COMPILER_GCC 0
#define GTL_PLATFORM_COMPILER_MINGW 0
#define GTL_PLATFORM_COMPILER_MSVC 0
#define GTL_PLATFORM_COMPILER_INTEL 0
#define GTL_PLATFORM_COMPILER_UNKNOWN 1

#if (defined(__clang__) && defined(__apple_build_version__))
    #undef GTL_PLATFORM_COMPILER_APPLE_CLANG
    #define GTL_PLATFORM_COMPILER_APPLE_CLANG 1
#endif

#if (defined(__clang__) && !defined(__apple_build_version__))
    #undef GTL_PLATFORM_COMPILER_CLANG
    #define GTL_PLATFORM_COMPILER_CLANG 1
#endif

#if ((defined(__GNUC__) || defined(__GNUG__)) && (!defined(__clang__) && (!defined(__INTEL_COMPILER))))
    #undef GTL_PLATFORM_COMPILER_GCC
    #define GTL_PLATFORM_COMPILER_GCC 1
#endif

#if (defined(__MINGW32__) || defined(__MINGW64__))
    #undef GTL_PLATFORM_COMPILER_MINGW
    #define GTL_PLATFORM_COMPILER_MINGW 1
#endif

#if (defined(_MSC_VER))
    #undef GTL_PLATFORM_COMPILER_MSVC
    #define GTL_PLATFORM_COMPILER_MSVC 1
#endif

#if (defined(__INTEL_COMPILER))
    #undef GTL_PLATFORM_COMPILER_INTEL
    #define GTL_PLATFORM_COMPILER_INTEL 1
#endif

#if (                                          \
    (GTL_PLATFORM_COMPILER_APPLE_CLANG)    ||  \
    (GTL_PLATFORM_COMPILER_CLANG)          ||  \
    (GTL_PLATFORM_COMPILER_GCC)            ||  \
    (GTL_PLATFORM_COMPILER_MINGW)          ||  \
    (GTL_PLATFORM_COMPILER_MSVC)           ||  \
    (GTL_PLATFORM_COMPILER_INTEL)              \
)
    #undef GTL_PLATFORM_COMPILER_UNKNOWN
    #define GTL_PLATFORM_COMPILER_UNKNOWN 0
#endif

namespace gtl {
    /// @brief Enumeration of the known compilers.
    enum class compiler_types {
        unknown,
        apple_clang,
        clang,
        gcc,
        mingw,
        msvc,
        intel
    };

    /// @brief Compile time variable holding the detected compiler.
    constexpr static const compiler_types compiler = []()constexpr->compiler_types{
        #if (GTL_PLATFORM_COMPILER_APPLE_CLANG)
            return compiler_types::apple_clang;
        #elif (GTL_PLATFORM_COMPILER_CLANG)
            return compiler_types::clang;
        #elif (GTL_PLATFORM_COMPILER_GCC)
            return compiler_types::gcc;
        #elif (GTL_PLATFORM_COMPILER_MINGW)
            return compiler_types::mingw;
        #elif (GTL_PLATFORM_COMPILER_MSVC)
            return compiler_types::msvc;
        #elif (GTL_PLATFORM_COMPILER_INTEL)
            return compiler_types::intel;
        #elif (GTL_PLATFORM_COMPILER_UNKNOWN)
            return compiler_types::unknown;
        #else
            #error "Issue detecting platform compiler."
        #endif
    }();
}

#endif // GTL_PLATFORM_COMPILER_HPP