Re: Module loading on Windows

[Shmuel Zeigerman <shmuz@...>]

Ignacio Burgueño wrote:
> Shmuel Zeigerman wrote:
> > If an lrexlib rock installs pcre.dll into the same directory as 
> > rex_pcre.dll, then the rock is wrong! pcre.dll should be either 
> > somewhere on Windows PATH, or in the directory where lua.exe resides.
>
> Why? Imagine two different applications are using different versions of 
> PCRE. If my rock installs its version of PCRE in the Windows path, it's 
> most likely to break the other applications.

Usually, if a Windows application is concerned with a particular DLL 
version, it installs it in the directory where it installs its EXE. 
Then, it can be safely uninstalled from there with the rest of the 
application.

> Whenever possible, its best to not drop dlls in the path. It breaks the 
> isolation of the rock.
> Also, consider what happens when you remove the rock. Do you remove the 
> dll you put on the path? What happens if you stepped onto the dll of 
> another application? Removing the dll will break it.

Agreed.
(And I wasn't suggesting that LuaRocks install DLLs on the PATH, I said 
installing pcre.dll on package.cpath would be wrong).

--
Shmuel