[fpc-pascal] Unable to compile fpc 3.0.4

Pierre Muller pierre at freepascal.org
Sat Dec 9 22:06:45 CET 2017

Hi Giuliano,

Le 09/12/2017 à 20:43, Giuliano Colla a écrit :
> I've stumbled into a problem.
> On one platform (linux x86_64, distro is CentOs6) I'm unable to compile 
> fpc packages of fpc 3.0.4
> The compiler is successful but the package compilation fails on package 
> paszlib. The error given is
> zbase.pas(446,7) Error: Illegal expression
> zbase.pas(447,36) Error: Operator is not overloaded: "Constant String" + 
> "zError(LongInt):AnsiString;"
> zbase.pas(506) Fatal: There were 2 errors compiling module, stopping
> Fatal: Compilation aborted
> The affected lines are:
>        str(err,zerror);
>        zerror:='Unknown zlib error '+zerror;
> if I patch those lines, sort of:
>        //str(err,zerror);
>        zerror:='Unknown zlib error ';//+zerror;
This looks like a problem of mode selection.

> then compilation fails in trees.pas: all occurences of tree[n].xx give 
> raise to an error
> trees.pas(871,18) Error: Array type required
> (followed by 30 more similar messages)
> I have no clue of where could be the problem.
> Any hint will be greatly appreciated.

It could be due to some configuration option in
the configuration file that gets loaded  automatically.

On linux systems, this is typically $HOME/.fpc.cfg

There is a very important switch that prevents loading those implicit configuration file:

when confronted to some error with public sources, you should always check if adding -n to options
does not change the outcome of your make run.

Simply try to run make but adding -n to Free Pascal compiler options,
simply by using

make OPT=-n

  Please report if this solves the compilation failure for
Free Pascal 3.0.4 sources for x86_64-linux.


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