implicit cast from unsigned long to unsigned int gives no warning with -Wall (64 bits arch)

[Andrew Haley]

Vincent Torri writes:
 > 
 > hey,
 > 
 > I have an ubuntu 64 bits on my core 2 duo. gcc version is 4.1.2
 > 
 > I compile that code with -Wall:
 > 
 > 
 > 
 > unsigned int htonl (unsigned int i)
 > {
 >    i = 0;
 >    return 0;
 > }
 > 
 > int
 > main ()
 > {
 >    unsigned long i;
 >    unsigned int j;
 > 
 >    i = 0;
 >    j = htonl (i);
 > 
 >    return 0;
 > }
 > 
 > 
 > but no warning is given
 > 
 > Is it normal ?

Yes.  If we warned about every implict narrowing conversion 99% of C
code would generate warnings.

For example:

  short j;
  short i = 2 + j;

... etc.

Andrew.

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