[fpc-pascal] Compiler flag define or $IFOPT for optimizations

[Tomas Hajny]

On 2022-05-28 13:44, Benito van der Zander via fpc-pascal wrote:


Hi,

> I want to show how my program was compiled.
> 
> Now I have string like "FPC3.2.2 i386-Linux R+C+" from
> 
>   compiler := 'FPC' + {$INCLUDE %FPCVERSION%} + ' ' + {$INCLUDE
> %FPCTargetCPU%}+'-'+{$INCLUDE %FPCTargetOS%}+ ' ' + {$IfOpt
> R+}+'R+'{$endif} {$IfOpt S+}+'S+'{$endif} {$IfOpt O+}+'O+'{$endif}
> {$IfOpt Q+}+'Q+'{$endif} {$IfOpt M+}+'M+'{$endif} {$IfOpt
> C+}+'C+'{$endif};
> 
> But the optimization level (-O2 or -O1 ...) is missing.
> 
> Is there an IFOPT for that? Or a define with all the arguments

I don't think that there's such an option at the moment. However, you 
can possibly solve it by always taking the options from an environment 
variable to the command line and then including contents of this command 
line to your sources. I don't think that it makes much sense for the 
compiler to provide such an option, because unlike the compiler version, 
different options (including the optimization level) may be used for 
compilation of different units and there's no such a thing as a general 
optimization level valid for the complete compiled program from the 
compiler point of view. You can introduce something like that yourself 
by always building all your sources from scratch, but then the solution 
outlined above should work for you.

Tomas