Hi all,
I don't know why I don't receive emails from gcc-help correctly.
In the archive I saw Axel Freyn replied this:
Gcc is right, the warning is appropriate.
gcc tells you that fullpath_length is not necessary, because while you
ASSIGN a value to it ("variable ... set"), you NEVER READ that value
("but not used").
And in your example code: Imagine we would simply remove
fullpath_length, and replace the last line by "strlen(fullpath);", then
your code would behave exactly as before.
So why do you have this variable fullpath_length? if you don't want that kind of warning, compile with the flag
-Wno-unused-but-set-variable
Thanks Axel, I understand. I commented fullpath_length = strlen(fullpath);
and there is no problem with that
Thanks
// Naderan *Mahmood;
----- Original Message -----
From: Andrew Haley <aph@xxxxxxxxxx>
To: Mahmood Naderan <nt_mahmood@xxxxxxxxx>
Cc: gcc <gcc-help@xxxxxxxxxxx>
Sent: Tuesday, July 12, 2011 10:43 PM
Subject: Re: variable ‘something’ set but not used [-Wunused-but-set-variable]
On 07/12/2011 07:12 PM, Mahmood Naderan wrote:
>> The message is correct. fullpath_length is set, but not used.
>
> Hi
> What is this then
>
> fullpath_length = strlen(fullpath); // variable is used here
>
> isn't a usage of fullpath_length?
No, it's not. It's a set of fullpath_length.
Andrew.
