spurious C warnings..

[Digby Tarvin <digbyt@acm.org>]

The is probably not specific to Debian, but the system I encountered it
on is Debian 3.1 (Sarge/Stable) and perhaps someone here can explain
it...

If I compile the program:
	main()
	{
	        long long foo = 077777777777777777777;
	
	
	        printf("sizeof foo is %d %llx\n", sizeof foo, foo);
	}
the compiler produces the warning:
	$ cc test.c
	test.c: In function `main':
	test.c:3: warning: integer constant is too large for "long" type

which would be entirely reasonable had I tried to use the constant
with a long type - but in this case I am not, so it seems completely
spurious.... (why not warn me about it being too long for int and
char also??)

If I run the program, it is evident that the correct code it generated:
	./a.out
	sizeof foo is 8 fffffffffffffff

I am guessing that long long literals are a language extension, but don't
have any reference here with which to check that...

Anyone know the reason for the warning, and if there is an option that
suppresses it?

I tried it on gcc 2.95.3 on my old (SuSE) system and it does not happen,
but on Debians 3.3.5 it does.
-- 
Digby R. S. Tarvin                                          digbyt(at)digbyt.com
http://www.digbyt.com