[fpc-devel] Is this a compiler bug ?

Pierre Free Pascal pierre at freepascal.org
Thu Sep 27 15:17:55 CEST 2012

> -----Message d'origine-----
> De : fpc-devel-bounces at lists.freepascal.org [mailto:fpc-devel-
> bounces at lists.freepascal.org] De la part de ik
> Envoyé : jeudi 27 septembre 2012 15:05
> À : FPC developers' list
> Objet : [fpc-devel] Is this a compiler bug ?
> Hello,
> While trying to compile FPC r22471:
> make CROSSOPT="-O2 -g -FD/usr/share/java/"  CPU_TARGET=jvm
> OS_TARGET=android INSTALL_PREFIX=/usr/ FPC=/usr/bin/ppcx64  all
> zipinstall
> I get the following message:
> /home/ik/projects/foss/fpc/fpc/compiler/ppc -Ur -Xs -O2 -n -Fujvm
> -Fusystems -Fu/home/ik/projects/foss/fpc/fpc/rtl/units/x86_64-linux
> -Fijvm -FE. -FUjvm/units/x86_64-linux -Cg -dRELEASE   -djvm -dGDB
> -dBROWSERLOG -Fujvm -dNOOPT -Sew pp.pas
> hlcgcpu.pas(2392,28) Warning: Constructing a class "thlcgjvm" with
> abstract method "g_overflowcheck"
> hlcgcpu.pas(2392,28) Warning: Constructing a class "thlcgjvm" with
> abstract method "g_overflowCheck_loc"
> hlcgcpu.pas(2397) Fatal: There were 2 errors compiling module, stopping
> The Compiler display two warnings and then it report them as 2 errors.
> I'm using Free Pascal Compiler version 2.6.0 [2012/05/17] for x86_64
> that arrives with Arch-Linux
> Is this a bug of the compiler (reporting errors as warnings), a bug in
> the code itself, or something else ?
  It is a feature of both the compiler capabilities itself
and of the fact that we consider that correct code should not generate
  -Sew is the option that transforms any warning into an error
it is a feature of the compiler that is used by default
when cycling (In the sense do a 'make cycle') the compiler.
  For java target it is known that there are warnings left,
but you can still use the Makefiles by adding
  ALLOW_WARNINGS=1 to the 'make cycle' command line.

Pierre Muller
... who's responsible for adding -Sew to the default compiler cycling!

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