Hi,

I have a VisualAge C++ compiler(Version 6). I have tried to compile the
following simple code (test.cxx) with xlC:

main(){
char c = 'a';
char *pc = &c;
int *pi;

pi = (int *)pc;
}

If I compile the above test.cxx with "-qinfo=cnv", the compiler doesn't
emit any warning. But if I compile the same file with "-qinfo" equal to
any of the 11 values(cnd, eff, gnr, got, par, por, ppc, rea, trd, uni,
use), the compiler emits the following warning:
"test.cxx", line 7.29: 1540-5344 (I) Pointer type "int *" and type
"char *" are not compatible in the current aliasing mode.

It seems the values for "-qinfo" options are not behaving correctly.
For example, by putting "-qinfo=got", I expect to get warnings for goto
statements; but it is giving me a warning for a type-conversion! I
expected "-qinfo=cnv" to warn me of any type conversion; but it didn't
complain anything!!!

I am new to AIX and xlC. Can someone in this newgroup explain this
abnormal behavior of "-qinfo" option?

Thanks in advance.

Jyotirmoy

Jyotirmoy wrote:
> If I compile the above test.cxx with "-qinfo=cnv", the compiler doesn't
> emit any warning. But if I compile the same file with "-qinfo" equal to
> any of the 11 values(cnd, eff, gnr, got, par, por, ppc, rea, trd, uni,
> use), the compiler emits the following warning:
> "test.cxx", line 7.29: 1540-5344 (I) Pointer type "int *" and type
> "char *" are not compatible in the current aliasing mode.

It would seem that there are some information messages that don't
fit any of the documented class. Not necessarily abnormal.

--
Gary R. Hook
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Vocatus atque non vocatus deus aderit