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cross_platform.md

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Entry

Homepage cross_platform_judgement link_library

platform SIMD forceinline _s_function

Platform

Entry

Homepage cross_platform_judgement link_library

//detect WIN32

//detect WIN64
//
//detect MSVC
#ifdef _MSC_VER
//detect GCC
#elif defined(__GNUC__)
//detect Clang
#elif defined(__clang__)
#detect Windows
if(WIN32)
#detect MacOS
if(APPLE)
#detect Linux
IF (CMAKE_SYSTEM_NAME MATCHES "Linux")

#detect MSVC
if (MSVC)
#detect GCC, use C++
if (CMAKE_COMPILER_IS_GNUCXX)
#detect Clang
if (CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
#or other lang
if (CMAKE_<LANG>_COMPILER_ID STREQUAL "Clang")

SIMD

Entry

Homepage cross_platform_judgement link_library

//GCC https://gcc.gnu.org/onlinedocs/gcc/Loop-Specific-Pragmas.html
//CLANG https://llvm.org/docs/Vectorizers.html
//MSVC https://docs.microsoft.com/en-us/cpp/preprocessor/loop?view=msvc-160
#pragma GCC ivdep
#pragma clang loop vectorize(enable) 
#pragma loop( ivdep )
if(MSVC)
#change to AVX... https://docs.microsoft.com/en-us/cpp/build/reference/arch-minimum-cpu-architecture?view=msvc-160
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /arch:AVX2")
else()
#or change to the deployed machine environment
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -march=native")
endif()

forceinline

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Homepage cross_platform_judgement link_library

#ifndef _WIN32
#define __forceinline inline __attribute__((always_inline))
#endif

_s

Entry

Homepage cross_platform_judgement link_library

//if not MSVC, do not define MACRO, to control MACRO num
#if defined(_MSC_VER) && !defined(_CRT_SECURE_NO_WARNINGS)
#define _CRT_SECURE_NO_WARNINGS
#endif