On 02 Dec 2012, at 22:26, Martin wrote:
If compiled, with PtrUint (as is below)
Free Pascal Compiler version 2.6.0 [2012/01/04] for i386
Compiling C:\Users\martin\AppData\Local\Temp\project1.lpr
project1.lpr(11,28) Warning: Variable "p" does not seem to be
initialized
project1.lpr(11,11) Warning: Conversion between ordinals and
pointers is not portable
project1.lpr(9,5) Note: Local variable "darr" is assigned but never
used
Linking C:\Users\martin\AppData\Local\Temp\project1.exe
That's because cardinal-cardinal results in an int64, because of a.o.
http://bugs.freepascal.org/view.php?id=8321
If replace the type
type IPointer = PtrInt;
Free Pascal Compiler version 2.6.0 [2012/01/04] for i386
Compiling C:\Users\martin\AppData\Local\Temp\project1.lpr
project1.lpr(11,28) Warning: Variable "p" does not seem to be
initialized
project1.lpr(11,11) Hint: Conversion between ordinals and pointers
is not portable
project1.lpr(9,5) Note: Local variable "darr" is assigned but never
used
Linking C:\Users\martin\AppData\Local\Temp\project1.exe
So actually the message is just downgraded from Warning to Hint.
Yes, that's by design. The compiler has no special knowledge about the
ptrint or ptruint types. It is almost impossible to fix all hints for
non-trivial programs, and they only exist to help find possibly
suspicious locations in code (and typecasting an integer into a
pointer is such an expression). You can always disable a particular
hint with -vqXXX if you are not interested in it.
and the full command line as issued by Lazarus:
fpc.exe -MObjFPC -Scghi -O1 -gw2 -godwarfsets -gl -gh -vewnhi -Filib
\i386-win32 -FUlib\i386-win32\ -l C:\Users\martin\AppData\Local\Temp
\project1.lpr"
If I remove the " - PointerSize2" it is always a hint. But the
location (11,11) doe not point to thin, it points to the uppercase
"P" of this most outer "Pointer()"typecast
The typecast of the integer expression to a pointer is what triggers
the warning/hint.
Jonas
_______________________________________________
fpc-devel maillist - [email protected]
http://lists.freepascal.org/mailman/listinfo/fpc-devel
