[fpc-devel] fpc and delphi applications cause floating point exceptions in other windows software :)

Paul Ishenin ip at kmiac.ru
Wed Jun 11 04:45:29 CEST 2008

Hello,  FPC developers' list.

While implementing cursor support for gtk2 I noticed that lazarus 
crashed every time with SIGFPE: division by zero in ICM32.dll if we used 
GdkPixbuf as an image for the cursor. In that time I made a woraround to 
use old gtk1 code for windows case (which used GtkPixmap's for the same 

Now lazarus needs icon support and the same thing: when GdkPixbuf is an 
icon image then we have SIGFPE: division by zero at the same dll.

Ok, I searched the internet and found this gtk issue: 
http://bugzilla.gnome.org/show_bug.cgi?id=316645 where ppl complained 
about borland tools which incorrectly modifies CPU flags and this cause 
crahes in other software (in that case GIMP).

I've made a conclusion that I have the same issue but with FPC. I 
disabled floating point exceptions before my gdk call and I see no crash 
and working cursors and icons.

I'm not skilled in compilers, CPUs and FPUs and I just want to ask you 
if it is ok?

Best regards,
Paul Ishenin.

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