Hi All,

I try to make a dynamic library and get this error:

paintrect.pas(0,0) Fatal: Can not find unit Controls used by paintrect. Check if package LCLBase is in the dependencies.

The source code of my library is:

library liboval;
{$mode objfpc}{$H+}
uses
? paintrect, oval;
function GetPainter: TPainter;
begin
end;
exports GetPainter;
begin
end. ? ?

And the used paintrect.pas is attached.

Any hint is greatly appreciated.

Thanks,
Shannon
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xrfang wrote

I try to make a dynamic library and get this error: paintrect.pas(0,0) Fatal: Can not find unit Controls used by paintrect. Check if package LCLBase is in the dependencies.

You need to add LCLBase as a project dependency.
Use the Project Inspector's Add button to show the Add to Project dialog. Project -> Project Inspector,
then in the Project Inspector click the middle tab to open the New Requirement page, and in the Package Name combo dropdown choose LCLBase from the long list presented.
Then click the [Create New Requirement] button, and you're done - the new package requirement will be listed under Required Packages node in the Project Inspector.

Hi Howard,

Thanks for your info. ?After adding LCLBase to dependencies, I get these errors:

/usr/bin/ld: warning: link.res contains output sections; did you forget -T? /usr/bin/ld: /home/xrfang/Desktop/paintrect/lib/x86_64-linux/paintrect.o: relocation R_X86_64_32S against `_$PAINTRECT$_Ld1' can not be used when making a shared object; recompile with -fPIC /home/xrfang/Desktop/paintrect/lib/x86_64-linux/paintrect.o: ??????: ???? liboval.lpr(14) Error: Error while linking

where "??????: ????" means "cannot read symbol: illegal value".

What's wrong here?

Thanks,
Shannon

? ?, 1? 22, 2013 at 10:41 ???Howard Page-Clark ???

xrfang wrote

I try to make a dynamic library and get this error: paintrect.pas(0,0) Fatal: Can not find unit Controls used by paintrect. Check if package LCLBase is in the dependencies.

You need to add LCLBase as a project dependency.
Use the Project Inspector's Add button to show the Add to Project dialog. Project -> Project Inspector,
then in the Project Inspector click the middle tab to open the New Requirement page, and in the Package Name combo dropdown choose LCLBase from the long list presented. Then click the [Create New Requirement] button, and you're done - the new package requirement will be listed under Required Packages node in the Project Inspector.

Le 22/01/2013 16:14, xrfang a ?crit :

Try adding
-fPIC
-dFPC_PIC
into program's options, Other section
Tha's what I use when building shared libraries.

Antonio.

Thanks, I added -fPIC and it worked, it seems no need to add -dFPC_PIC?

Also I found a small problem. While create a new shared library and compile fpc always complain that -WR is invalid. I have to uncheck "Relocatable" option to fix this.

I think this is a bug in lazarus project template, what do you think?

2013/1/23 Antonio Fortuny

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