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List: mono-list
Subject: RE: [Mono-list] System.DllNotFoundException
From: "Martin Welch" <martin () welch ! eclipse ! co ! uk>
Date: 2004-04-08 22:25:35
Message-ID: GIEKKMAAMELBNKEJJKHGMEJECMAA.martin () welch ! eclipse ! co ! uk
[Download RAW message or body]
I'm making progress.
My library foo.so comprises two cpp files that only contain extern "C"
functions.
If i build this library and PInvoke to it everything's ok.
If I then add another cpp file, this time with a class definition and
implementation then I get the System.DllNotFoundException, even if the class
isn't referenced by the extern "C" functions.
Take the cpp file out and it works again.
Is this making sense? What am I doing wrong?
Thanks,
Martin
-----Original Message-----
From: mono-list-admin@lists.ximian.com
[mailto:mono-list-admin@lists.ximian.com]On Behalf Of Martin Welch
Sent: 08 April 2004 19:40
To: Mono-List
Subject: [Mono-list] System.DllNotFoundException
I have a simple c# app trying to PInvoke to a shared library on my
Mandrake 10 box using Mono-0.31.
I assumed that mono would look in the current directory but it seems my
assumption is wrong since the so in question does exist.
I'm even hardcoding the path in my DllImport attribute:
[
DllImport
(
"/home/martin/source/foo",
EntryPoint="MyFunc",
CharSet=CharSet.Ansi,
CallingConvention=CallingConvention.Cdecl
)
]
private static extern IntPtr MyFunc(int v,
[MarshalAs(UnmanagedType.LPArray, ArraySubType=UnmanagedType.LPStr)]
string[] a, string n);
Please bear in mind that I'm not a very experienced linux user so in all
likelihood I've done something profoundly stupid or overlooked something
really obvious.
Where does mono look for so's?
Thanks,
Martin
[Attachment #3 (text/html)]
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=Content-Type content="text/html; charset=iso-8859-1">
<META content="MSHTML 6.00.2800.1400" name=GENERATOR></HEAD>
<BODY>
<DIV><FONT face=Verdana color=#0000ff size=2><SPAN class=498461922-08042004>I'm
making progress.</SPAN></FONT></DIV>
<DIV><FONT face=Verdana color=#0000ff size=2><SPAN
class=498461922-08042004></SPAN></FONT> </DIV>
<DIV><FONT face=Verdana color=#0000ff size=2><SPAN class=498461922-08042004>My
library foo.so comprises two cpp files that only contain extern "C"
functions.</SPAN></FONT></DIV>
<DIV><FONT face=Verdana color=#0000ff size=2><SPAN
class=498461922-08042004></SPAN></FONT> </DIV>
<DIV><FONT face=Verdana color=#0000ff size=2><SPAN class=498461922-08042004>If i
build this library and PInvoke to it everything's ok.</SPAN></FONT></DIV>
<DIV><FONT face=Verdana color=#0000ff size=2><SPAN
class=498461922-08042004></SPAN></FONT> </DIV>
<DIV><FONT face=Verdana color=#0000ff size=2><SPAN class=498461922-08042004>If I
then add another cpp file, this time with a class definition and implementation
then I get the System.DllNotFoundException, even if the class isn't referenced
by the extern "C" functions.</SPAN></FONT></DIV>
<DIV><FONT face=Verdana color=#0000ff size=2><SPAN
class=498461922-08042004></SPAN></FONT> </DIV>
<DIV><FONT face=Verdana color=#0000ff size=2><SPAN class=498461922-08042004>Take
the cpp file out and it works again.</SPAN></FONT></DIV>
<DIV><FONT face=Verdana color=#0000ff size=2><SPAN
class=498461922-08042004></SPAN></FONT> </DIV>
<DIV><FONT face=Verdana color=#0000ff size=2><SPAN class=498461922-08042004>Is
this making sense? What am I doing wrong?</SPAN></FONT></DIV>
<DIV><FONT face=Verdana color=#0000ff size=2><SPAN
class=498461922-08042004></SPAN></FONT> </DIV>
<DIV><FONT face=Verdana color=#0000ff size=2><SPAN
class=498461922-08042004>Thanks,</SPAN></FONT></DIV>
<DIV><FONT face=Verdana color=#0000ff size=2><SPAN
class=498461922-08042004></SPAN></FONT> </DIV>
<DIV><FONT face=Verdana color=#0000ff size=2><SPAN
class=498461922-08042004>Martin</SPAN></FONT></DIV>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B>
mono-list-admin@lists.ximian.com
[mailto:mono-list-admin@lists.ximian.com]<B>On Behalf Of </B>Martin
Welch<BR><B>Sent:</B> 08 April 2004 19:40<BR><B>To:</B>
Mono-List<BR><B>Subject:</B> [Mono-list]
System.DllNotFoundException<BR><BR></FONT></DIV>
<DIV><FONT face=Verdana size=2><SPAN class=128442718-08042004>I have a simple
c# app trying to PInvoke to a shared library on my Mandrake 10 box using
Mono-0.31.</SPAN></FONT></DIV>
<DIV><FONT face=Verdana size=2><SPAN
class=128442718-08042004></SPAN></FONT> </DIV>
<DIV><FONT face=Verdana size=2><SPAN class=128442718-08042004>I assumed that
mono would look in the current directory but it seems my assumption is wrong
since the so in question does exist.</SPAN></FONT></DIV>
<DIV><FONT face=Verdana size=2><SPAN
class=128442718-08042004></SPAN></FONT> </DIV>
<DIV><FONT face=Verdana size=2><SPAN class=128442718-08042004>I'm even
hardcoding the path in my DllImport attribute:</SPAN></FONT></DIV>
<DIV><FONT face=Verdana size=2><SPAN
class=128442718-08042004></SPAN></FONT> </DIV>
<DIV><FONT face=Verdana size=2><SPAN
class=128442718-08042004> [<BR> DllImport<BR> (<BR> "/home/martin/source/foo", \
<BR> EntryPoint="MyFunc", <BR> CharSet=CharSet.Ansi,
<BR> CallingConvention=CallingConvention.Cdecl<BR> )<BR> ]<BR> private \
static extern IntPtr MyFunc(int v, [MarshalAs(UnmanagedType.LPArray,
ArraySubType=UnmanagedType.LPStr)] string[] a, string
n);<BR></SPAN></FONT></DIV>
<DIV><FONT face=Verdana size=2><SPAN class=128442718-08042004>Please bear in
mind that I'm not a very experienced linux user so in all likelihood I've done
something profoundly stupid or overlooked something really
obvious.</SPAN></FONT></DIV>
<DIV><FONT face=Verdana size=2><SPAN
class=128442718-08042004></SPAN></FONT> </DIV>
<DIV><FONT face=Verdana size=2><SPAN class=128442718-08042004><SPAN
class=128442718-08042004>Where does mono look for so's?
</SPAN></SPAN></FONT></DIV>
<DIV><FONT face=Verdana size=2><SPAN class=128442718-08042004><SPAN
class=128442718-08042004></SPAN></SPAN></FONT> </DIV>
<DIV><FONT face=Verdana size=2><SPAN class=128442718-08042004><SPAN
class=128442718-08042004>Thanks,</SPAN></SPAN></FONT></DIV>
<DIV><FONT face=Verdana size=2><SPAN class=128442718-08042004><SPAN
class=128442718-08042004></SPAN></SPAN></FONT> </DIV>
<DIV><FONT face=Verdana size=2><SPAN class=128442718-08042004><SPAN
class=128442718-08042004>Martin</SPAN></DIV></BLOCKQUOTE></SPAN></FONT></BODY></HTML>
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