As a curiosity, gcc 4.5.1 compiled by myself for my ppc debian emits a
warning of the type "conversion to size_t from int may change the
sign" for the code
size_t var=0;
var = strspn("hello","lo");
var = (size_t)strspn("hello","lo");
where strspn returns a size_t type
(http://linux.die.net/man/3/strspn). The warning appears in both
cases. But the warning only appears with the flag -Wconversion
combined with -O3/-O2 or -O1 optimizations. Apparently, in this
version some warnings depends on the level of optimization.
Attached I send the example files
--
*****************************************
José Luis García Pallero
jgpallero@xxxxxxxxx
(o<
/ / \
V_/_
Use Debian GNU/Linux and enjoy!
*****************************************
#ifndef _LIBTEST_H_
#define _LIBTEST_H_
#include<stdio.h>
#ifdef __cplusplus
extern "C" {
#endif
void printChar(const char data);
void printLong(const long data);
#ifdef __cplusplus
}
#endif
#endif
#include"libtest.h"
void printChar(const char data)
{
printf("Character is: %c\n",data);
return;
}
void printLong(const long data)
{
printf("Long data is: %ld\n",data);
return;
}
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include"libtest.h"
int main()
{
size_t var=0;
printf("Small test program:\n");
printChar('E');
printChar((char)'E');
printLong(1);
printLong((long)1);
var = strspn("hello","lo");
var = (size_t)strspn("hello","lo");
return 0;
}
Attachment:
Makefile
Description: Binary data
