[Mono-list] Cygwin woes

[Colin JN Breame]

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Hello,

This is a multipart-er....

I'm trying to build a cygwin dll which can then be called from the CS 
world.  (please see attachment or end of message for test.c and test.cs)

If I compile with `gcc -shared -mno-cygwin -o test.dll test.c' and `mcs 
test.cs' both test.dll and test.exe is created.  Running test.exe outputs:

start
hello world.
end

as expected.


However, compiled with `gcc -shared -o test.dll test.c', things get weird...

First off, once test.dll has been built, `mcs test.cs' results in a core 
dump.  This is really odd, as if test.dll is deleted, it compiles as it 
should.

Ok, so `mcs test.cs' first then `gcc -shared -o test.dll test.c' and the 
directory contains test.exe and test.dll.  Running test.exe results in a 
core dump (please find attached).

Using the windows .Net runtime, the program terminates prematurely, with 
output:

start

Right,
(a) any ideas what might be going wrong here?  Why is the call to the 
cygwin built dll failing?

(b) why is mcs reading test.dll at all?

I'm using Mono 1.0.4.0 and Cygwin version 1.5.12-1.

Regards
Colin JN Breame


test.c:

#include <stdio.h>

void test() {
        printf("hello world.\n");
        fflush(stdout);
}


test.cs:

using System;
using System.Runtime.InteropServices;

public class Hello {
        [DllImport("test")]
        extern static void test();

        public static void Main(string[] args) {
                Console.WriteLine("start");
                test();
                Console.WriteLine("end");
        }
}


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Exception: STATUS_ACCESS_VIOLATION at eip=00000000
eax=610F0A10 ebx=00000000 ecx=00000000 edx=01721700 esi=01C5F2F4 edi=00000001
ebp=00000000 esp=01C5F2A8 program=C:\PROGRA~1\MONO-1~1.4\lib\mono.exe, pid 808, thread main
cs=001B ds=0023 es=0023 fs=003B gs=0000 ss=0023
Stack trace:
Frame     Function  Args
End of stack trace

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