gcc warning for big struct or variable size

skaushal_lk · 04-17-2012, 04:15 AM

Hi friends,

I am wondering if there is any option in gcc to warn about big struct or variable sizes.

thanks in advance,

NevemTeve · 04-17-2012, 06:07 AM

You got a warning you don't want, or you want a warning you don't get?

skaushal_lk · 04-17-2012, 08:52 AM

Quote:

Originally Posted by NevemTeve

You got a warning you don't want, or you want a warning you don't get?

Sorry i wasn't clear enough. Actually i want an option in gcc to flag the warning if a structure/variable/functions is too large or size is larger than user defined threshold size.

pan64 · 04-17-2012, 08:55 AM

maybe an assert can do this for you

skaushal_lk · 04-17-2012, 10:08 PM

I found the gcc options what i was looking for.

http://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html

Quote:

-Wlarger-than=len
Warn whenever an object of larger than len bytes is defined.
-Wframe-larger-than=len
Warn if the size of a function frame is larger than len bytes. The computation done to determine the stack frame size is approximate and not conservative. The actual requirements may be somewhat greater than len even if you do not get a warning. In addition, any space allocated via alloca, variable-length arrays, or related constructs is not included by the compiler when determining whether or not to issue a warning

thanx every one.