[fpc-pascal] Unexpected warning messages...

[Thomas Kurz]

I think they have to be compiled because of the usage of generic types. The compiler cannot know in advance what specialization you're gonna use.


----- Original Message ----- 
From: Gene Buckle via fpc-pascal <fpc-pascal at lists.freepascal.org>
To: fpc-pascal at lists.freepascal.org <fpc-pascal at lists.freepascal.org>
Sent: Saturday, October 17, 2026, 19:16:02
Subject: [fpc-pascal] Unexpected warning messages...


On 10/17/2026 12:52 AM, Sven Barth via fpc-pascal wrote:
> Gene Buckle via fpc-pascal <fpc-pascal at lists.freepascal.org> schrieb > am Fr., 16. Okt. 2026, 16:42:
>
>     I've started working with FPC again after a VERY long hiatus (like
>     15+
>     years!) and the application I'm working on uses TObjectCollection
>     from
>     the Generics.Collection unit.
>
>     When compiling I get the following warnings from
>     generics.dictionaries
>     and I was wondering why that is happening - I'd have thought that
>     "base"
>     units would always compile cleanly. I know I can filter them out in
>     Lazarus, but I would rather not if it can be avoided on the
>     assumption
>     that warnings are warnings for a *reason*. :)
>
>
> The assumption that base units compile cleanly is not true. Normally > you don't notice it however cause they're pre-compiled. Exceptions are > inlined routines and generic specializations cause they're both > processed inside the unit they're used in.
>
I don't understand why they're being compiled all the time - is this a Lazarus thing?  AFAIK, the only time an RTL unit should *ever* be recompiled is if the source changes.

The filters  (Lazarus 4.8) don't work well as filtering for "...never used" in generics.collections.pas never works; they're always displayed.


> There isn't really something you can do and in this case they aren't > problematic either. In the development version these messages have > been reduced.
>
They're problematic for *me* by spamming the Messages window with junk I don't need to see which makes the things I NEED to see difficult to find.

g.

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