Portable static constructor in C for MSVC, GCC and Clang (Windows, Linux, macos)

myexe.c

#include <stdio.h>

extern void mylib_test();

int main()
{
    puts("Hello, world!");

    // NOTE: Your project must use at least one symbol from the static library
    mylib_test();
}

mylib.c

// Reference: https://stackoverflow.com/a/2390626/1806760
// Initializer/finalizer sample for MSVC and GCC/Clang.
// 2010-2016 Joe Lowe. Released into the public domain.

#ifdef __cplusplus
    #define INITIALIZER(f) \
        static void f(void); \
        struct f##_t_ { f##_t_(void) { f(); } }; static f##_t_ f##_; \
        static void f(void)
#elif defined(_MSC_VER)
    #pragma section(".CRT$XCU",read)
    #define INITIALIZER2_(f,p) \
        static void f(void); \
        __declspec(allocate(".CRT$XCU")) void (*f##_)(void) = f; \
        __pragma(comment(linker,"/include:" p #f "_")) \
        static void f(void)
    #ifdef _WIN64
        #define INITIALIZER(f) INITIALIZER2_(f,"")
    #else
        #define INITIALIZER(f) INITIALIZER2_(f,"_")
    #endif
#else
    #define INITIALIZER(f) \
        static void f(void) __attribute__((__constructor__)); \
        static void f(void)
#endif

#include <stdio.h>
#include <stdlib.h>

static void mylib_finalize(void)
{
    printf("finalize\n");
}

INITIALIZER(mylib_initialize)
{
    printf("initialize\n");
    atexit(mylib_finalize);
}

void mylib_test()
{

}