C++: No Warning for passing value > 255 as parameter to a function requiring "unsigned char"

[Martin Wodok <m dot wodok at osb-ag dot de>]

Hi,

I'm compiling with "gcc (GCC) 4.0.1 (Debian 4.0.1-2)" and have the following 
problem: I don't manage to get a warning for the following code

    void anyFunction (unsigned char var)
    {
      printf ("anyFunction's var: %d\n", var); fflush(0);
    }

    int main()
    {
      unsigned char var = 1000;
      printf ("main's var: %d\n", var); fflush(0);
      anyFunction (1000);
    }

Assigning 1000 is of course out of bounds for "unsigned char", thus the 
correct output, which I do get, is:

    main's var: 232
    anyFunction's var: 232

My parameters to enable warnings are:

-Wall -Winline -Wshadow -Woverloaded-virtual -W -Wconversion -Wpointer-arith

Do I miss some warning-parameters that I can use to get a warning for the 
above code? I haven't found any yet...

Many thanks in advance!
Greetings from Munich,
Martin Wodok

-- 
Dipl.-Inf. Martin Wodok
OSB AG Ingenieur- und IT-Dienstleistungen
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80469 München
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