[Mono-devel-list] How to use shared library with C# on linux

Daniel Schalk daniel at schalk.de
Wed Nov 19 12:23:00 EST 2003


I'm trying to code a C# app, which calls a C-function out of a shared
library (e.g. testlib.so).
In the testlib.cc i placed the following code:

#include <stdio.h>

void fktTest(void)
	printf("called fktTest");

I compiled it with: gcc -c -fpic testlib.cc
then: gcc -shared -fpic -o testlib.so testlib.o

Now I created LibTest.cs:

using System;
using System.Runtime.InteropServices;

namespace LibTest
 class LibraryTest
  [DllImport("testlib", EntryPoint="fktTest")]
  public static extern void fktTest();

  static void Main(string[] args)

I compiled it with : mcs LibTest.cs
So far, there were no errors. Because I'm novice on linux (and mono :-)),
was it right, what I did so far? Are there any faults within my code/doing?

Further questions:
How do I have to go on to get running my application?
Where to place the .so file?

Because if I run the app with the .so in the same directory, I get error
"unhandeled exception: System.MissingMethodException ...").
What is wrong? After one day of "googling", I didn't find a solution.

Thanks a lot,

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