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Re: Warnings on long constants in gcc 3.3, 3.4

From: Segher Boessenkool <segher at kernel dot crashing dot org>
To: Eric Sandeen <sandeen at sgi dot com>
Cc: gcc at gcc dot gnu dot org
Date: Tue, 13 Jul 2004 18:57:01 +0200
Subject: Re: Warnings on long constants in gcc 3.3, 3.4
References: <1089737388.10814.9.camel@stout.americas.sgi.com>

test.c:7: warning: integer constant is too large for "long" type

for things like this:
#define LONGLONGMACRO 1099511628211
printf("%lld\n", LONGLONGMACRO);

While I could append "LL" to the constant (with apparently some portability problems for the MSVC compiler, argh), it has been stated to me that c99 should promote the type of the constant to something that it will fit into.

Add -std=c99 (or -std=gnu99) and the warning is gone.

Segher

References:
- Warnings on long constants in gcc 3.3, 3.4
  - From: Eric Sandeen

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