Andrew Brunner wrote'm running into another issue where I create all classes from scratch
to avoid using Classes unit inside library and now my library won't
load. The only FPC related unit I use is SysUtils.
I cannot reproduce this crash following http://bugs.freepascal.org/view.php?id=12814
I completed the main program (please always submit fully compilable code, not just snippets) as follows:
{$mode delphi}
uses
dynlibs;
procedure Test();
var
FLib : TLibHandle;
begin
FLib:=Dynlibs.LoadLibrary('./libMatrixMemoryManager.so');
DynLibs.UnloadLibrary(FLib); // WILL CRASH HERE.
end;
begin
test;
end.
Note that I replaced "MatrixMemoryManager.so" with "libMatrixMemoryManager.so". I get a crash if loadlibrary fails and returned 0. You should check for this condition in your code. Other than that, it works fine:
~/fpc/test/tw12814$ ppcxf1 -l MatrixMemoryManager.pp
Free Pascal Compiler version 2.2.3 [2008/12/17] for x86_64
Copyright (c) 1993-2008 by Florian Klaempfl
Target OS: Linux for x86-64
Compiling MatrixMemoryManager.pp
Linking libMatrixMemoryManager.so
18 lines compiled, 0.4 sec
~/fpc/test/tw12814$ ppcxf1 -l tt.pp
Free Pascal Compiler version 2.2.3 [2008/12/17] for x86_64
Copyright (c) 1993-2008 by Florian Klaempfl
Target OS: Linux for x86-64
Compiling tt.pp
Linking tt
15 lines compiled, 0.2 sec
~/fpc/test/tw12814$ ./tt
~/fpc/test/tw12814$ echo $?
0
~/fpc/test/tw12814$ cat MatrixMemoryManager.pp
library MatrixMemoryManager;
{$mode objfpc}{$H+}
uses cMem,SysUtils,Classes;
var
List:TList;
function Startup:boolean; stdcall; export;
begin
List:=TList.Create;
Result:=True;
end;
function Shutdown:boolean; stdcall; export;
begin
FreeAndNil(List);
Result:=True;
end;
exports Startup, Shutdown;
begin
end.
This is on Scientific Linux 5.2 (free distro based on Red Hat Enterprise Linux 5.2). Are you sure that you are using 2.2.3 and not 2.3.1?
Jonas
