1// Literatur: Vorlesungsunterlagen ASD3 von Thomas Scheidl (FH-Hagenberg)
2// http://linux.die.net/man/
3
4
5//executable.cpp:
6//-------------------------------------------------------------------
7 #include <iostream>
8 #include <dlfcn.h>
9
10 using namespace std;
11
12 typedef void (*Test)();
13
14 int main()
15 {
16 void *lib = dlopen("./sharedobject.so", RTLD_NOW);
17
18 if (lib != 0)
19 {
20 Test f1 = reinterpret_cast<Test>(dlsym(lib, "Test"));
21
22 if (f1 != 0)
23 {
24 f1();
25 }
26 else
27 {
28 cout << dlerror() << endl;
29 cout << "failed get function pointer" << endl;
30 }
31
32 dlclose(lib);
33 }
34 else
35 {
36 cout << "failed loading .so" << endl;
37 }
38 }
39
40//sharedobject.cpp:
41//-------------------------------------------------------------------
42 #include <iostream>
43
44 using namespace std;
45
46 extern "C" void Test()
47 {
48 cout << "Test" << endl;
49 }
50
51//Makefile:
52//-------------------------------------------------------------------
53 main: SO EXC
54
55 SO: sharedobject.cpp
56 g++ -shared -o sharedobject.so sharedobject.cpp
57
58 EXC: executable.cpp
59 g++ -o executable executable.cpp -ldl
60
61 clean:
62 rm -f *.o
