On Mon, 22 Feb 2010, Davies, Aaron wrote:
I discoved the following behavior while trying to get warnings-clean on some existing code. It was intially found in a call to ntohs(3); the below snippet isolates it. Is this warning expected?
$ gcc --version
gcc (GCC) 4.1.2 20080704 (Red Hat 4.1.2-44)
Copyright (C) 2006 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
$ cat test.c
int f(unsigned short int i){return i;}
int main(int c,char**v){return f((unsigned short int)0);}
$ gcc -Wall -Wconversion test.c
test.c: In function 'main':
test.c:2: warning: passing argument 1 of 'f' with different width due to prototype
gcc-4.3 and later don't give this warning anymore.
--
Marc Glisse
