Bug#140995: gcc-3.0: -Wswitch (also part of -Wall) is broken

[Agthorr <agthorr@barsoom.org>]

Package: gcc-3.0
Version: 1:3.0.4-6
Severity: normal

-Wswitch doesn't actually seem to do anything in gcc-3.0, although it
works in gcc 2.95.4.  Here's what the documentation says it *should*
do:

------------------------------------------------------------------------
`-Wswitch'
     Warn whenever a `switch' statement has an index of enumeral type
     and lacks a `case' for one or more of the named codes of that
     enumeration.  (The presence of a `default' label prevents this
     warning.)  `case' labels outside the enumeration range also
     provoke warnings when this option is used.
------------------------------------------------------------------------

Here's a sample program:

------------------------------------------------------------------------
enum foo {
        FUBAR = 0,
        SNAFU = 1
};

int main(void)
{
        enum foo boop;

        switch (boop) {
        case FUBAR:
                break;
        case 3:
                break;
        }

        return 0;
}
------------------------------------------------------------------------

and here's what happen with gcc 2.95.4:

------------------------------------------------------------------------
volition:~/tmp$ gcc -Wswitch switch.c
switch.c: In function `main':
switch.c:16: warning: enumeration value `SNAFU' not handled in switch
switch.c:16: warning: case value `3' not in enumerated type `foo'
volition:~/tmp$ gcc --version
2.95.4
volition:~/tmp$ 
------------------------------------------------------------------------

but here's what happens with gcc-3.0:

------------------------------------------------------------------------
volition:~/tmp$ gcc-3.0 -Wswitch switch.c
volition:~/tmp$ 
------------------------------------------------------------------------

I normally compile with gcc 3.0 since it has so many more warnings
that I can turn on, so this is somewhat disheartening :-(


-- System Information
Debian Release: 3.0
Architecture: i386
Kernel: Linux volition 2.4.18volition #1 Thu Mar 28 20:13:24 PST 2002 i686
Locale: LANG=C, LC_CTYPE=

Versions of packages gcc-3.0 depends on:
ii  binutils                   2.12.90.0.1-1 The GNU assembler, linker and bina
ii  cpp-3.0                    1:3.0.4-6     The GNU C preprocessor.
ii  gcc-3.0-base               1:3.0.4-6     The GNU Compiler Collection (base 
ii  libc6                      2.2.5-3       GNU C Library: Shared libraries an
ii  libgcc1                    1:3.0.4-6     GCC support library.



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