Re: c/8804: gcc fails to warn when function omits a return statement

Re: c/8804: gcc fails to warn when function omits a return statement

[paolo]

Synopsis: gcc fails to warn when function omits a return statement

Responsible-Changed-From-To: unassigned->paolo
Responsible-Changed-By: paolo
Responsible-Changed-When: Tue Dec  3 14:23:18 2002
Responsible-Changed-Why:
    Analyzed.
State-Changed-From-To: open->closed
State-Changed-By: paolo
State-Changed-When: Tue Dec  3 14:23:18 2002
State-Changed-Why:
    Add -Wall (or just -Wreturn-type) to your command line.

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=8804

c/8804: gcc fails to warn when function omits a return statement

[gisli.ottarsson]

>Number:         8804
>Category:       c
>Synopsis:       gcc fails to warn when function omits a return statement
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Dec 03 14:16:00 PST 2002
>Closed-Date:
>Last-Modified:
>Originator:     Gisli Ottarsson
>Release:        gcc (GCC) 3.2 20020822 (Red Hat Linux Rawhide 3.2-4)
>Organization:
>Environment:

>Description:

The following program, which contains an int 
function which fails to return a value, compiles 
without a warning, even with the -pedantic flag.

The program illustrates a form of programmer brain-
damage where the programmer has neglected to type
the 'return' keyword.  This bug can be extremely 
difficult to find but many thankfully, many other 
compilers will catch this and issue a warning/error.
For instance, SGI's compiler warns that: "Non-void 
function "foo" (declared at line 1) should return a 
value."

int foo()
{
  3;
}

int main()
{
  return foo();
}

Please modify gcc so that it issues a warning when it
encounters such mistakes.



>How-To-Repeat:

>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted: