g++ How to get warning on ignoring function return value
- by ArunSaha
lint produces some warning like:
foo.c XXX Warning 534: Ignoring return value of function bar()
From the lint manual
534 Ignoring return value of function
'Symbol' (compare with Location) A
function that returns a value is
called just for side effects as, for
example, in a statement by itself or
the left-hand side of a comma
operator. Try: (void) function(); to
call a function and ignore its return
value. See also the fvr, fvo and fdr
flags in §5.5 "Flag Options".
I want to get this warning, if there exists any, during compilation. Is there any option in gcc/g++ to achieve this? I had turned on -Wall but that apparently did not detect this.
