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#include <stdio.h>
#include <assert.h>
#ifdef _WIN32
#include <windows.h>
#else
#include <dlfcn.h>
#endif
#if defined _WIN32 || defined __CYGWIN__
#define DLL_PUBLIC __declspec(dllexport)
#else
#if defined __GNUC__
#define DLL_PUBLIC __attribute__ ((visibility("default")))
#else
#pragma message ("Compiler does not support symbol visibility.")
#define DLL_PUBLIC
#endif
#endif
typedef int (*fptr) (void);
int DLL_PUBLIC
func_from_executable(void)
{
return 42;
}
int main(int argc, char **argv)
{
int expected, actual;
fptr importedfunc;
if (argc=0) {}; // noop
#ifdef _WIN32
HMODULE h = LoadLibraryA(argv[1]);
#else
void *h = dlopen(argv[1], RTLD_NOW);
#endif
assert(h != NULL);
#ifdef _WIN32
importedfunc = (fptr) GetProcAddress (h, "func");
#else
importedfunc = (fptr) dlsym(h, "func");
#endif
assert(importedfunc != NULL);
assert(importedfunc != func_from_executable);
actual = (*importedfunc)();
expected = func_from_executable();
assert(actual == expected);
#ifdef _WIN32
FreeLibrary(h);
#else
dlclose(h);
#endif
return 0;
}
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