Re: Plugins/Dynamic Libraries

[Martin Krischik <martin@krischik.com>]

Adrien Plisson wrote:

> Martin Krischik wrote:
> 
>> A current version of GNAT and GPS can do DLLs out of the box. Just Add
>> the
>> 
>>     for Library_Dir         use  ...;
>>     for Library_Name        use ...;
>>     for Library_Kind        use ...;
>>     for Library_Version     use ....;
> 
> these are static bindings done at compile time. the resulting executable
> contains a segment which tells the system to load the given library and
> relocate symbols in the process space. but if the library is not present
> at application startup, the application does not start: the system is
> responsible for loading and checking the dll. (at least it works this
> way under windows).
> 
> Andrew was talking about dynamic bindings at runtime. that is calling a
> function which loads the dll, whose name is contained in a variable. if
> at application startup the library does not exists, it is not a problem:
> the programmer is responsible for loading and checking the dll.
> 
>> to your project file and all needed steps will be done for you. Why there
>> is no checkbox in GPS I don't know. For Windows you need the
>> "experimental" MinGW GNAT based on GCC 3.4.2. Older GNAT's can do Linux
>> DLLs only.
> 
> it seems GNAT 3.15p for windows is doing DLLs (according to the doc, i
> had no time to test it).

Last time I checked in GNAT 3.15p you had to read 2 pages of documentation
and then call dlltool 3 times with all sorts of wacky options while in GCC
3.4.2 you just tell the project manager you want a DLL and then GNAT does
it all for you (incl. calling dlltool).

With Regards

Martin
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