Dynamic symbol resolution from a static binary

foobar.c

/*
 * Dynamic symbol resolution from a static binary:
 *
 * Windows:	gcc -o foobar.exe -Wl,-export-all-symbols foobar.c && ./foobar
 * Linux:	gcc -o foobar -rdynamic -ldl foobar.c && ./foobar
 */
#ifdef _WIN32
  #include <windows.h>
#else
  #define _GNU_SOURCE
  #include <dlfcn.h>
#endif

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

int main() {
	const char *symbol = "main";
#ifdef _WIN32
	void *addr = GetProcAddress(NULL, symbol);
#else
	void *addr = dlsym(RTLD_DEFAULT, symbol);
#endif
	if (!addr) {
		printf("FAILED to resolve symbol '%s'\n", symbol);
		return EXIT_FAILURE;
	}
	printf("symbol '%s' successfully resolved to %p\n", symbol, addr);
	return EXIT_SUCCESS;
}