To detect OS (OS X/Linux/Windows, etc.) on a C preprocessor?

I'm going to make a C/C++ code that supports multiple platforms You want to determine which platform the preprocessor is using. Where can I find relevant information?

c c++ cross-platform preprocessor os-detection

2022-09-22 22:26

1 Answers

The list of macros available for most compilers is [here], See [here]

for predefined macros in the GCC compiler

Example in gcc

#ifdef _WIN32
   //define something for Windows (32-bit and 64-bit, this part is common)
   #ifdef _WIN64
      //define something for Windows (64-bit only)
   #endif
#elif __APPLE__
    #include "TargetConditionals.h"
    #if TARGET_IPHONE_SIMULATOR
         // // iOS Simulator
    #elif TARGET_OS_IPHONE
        // // iOS device
    #elif TARGET_OS_MAC
        // // Other kinds of Mac OS
    #else
    #   #   error "Unknown Apple platform"
    #endif
#elif __linux__
    // // linux
#elif __unix__ // all unices not caught above
    // // Unix
#elif defined(_POSIX_VERSION)
    // // POSIX
#else
#   #   error "Unknown compiler"
#endif

The results of this macro depend on the compiler

_WIN32 detects windows as well as 32-bit (x86) You can also write _WIN32 #ifdef instead of The_WIN64 #ifdef

2022-09-22 22:26

If you have any answers or tips

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