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Re: preprocessor/8139: Bad new INT64_C macro
- From: "Philippe RIBET" <philippe_ribet at hotmail dot com>
- To: gcc-gnats at gcc dot gnu dot org, gcc-prs at gcc dot gnu dot org, gcc-bugs at gcc dot gnu dot org, nobody at gcc dot gnu dot org
- Cc: philippe_ribet at hotmail dot com
- Date: Mon, 07 Oct 2002 08:59:44 +0000
- Subject: Re: preprocessor/8139: Bad new INT64_C macro
- Bcc:
What is the new definition? What is this macro?
Old macro was:
# if __WORDSIZE == 64
# define INT64_C(c) c ## L
# else
# define INT64_C(c) c ## LL
# endif
New macro is:
#define INT64_C(val) (INT_LEAST64_MAX-INT_LEAST64_MAX+(val))
(in file include/stdint.h)
This macro is part of ANSI C99 standard. It allows to specify integer
constant size.
I suspect the warnings are correct, but new, and that the definition
of the macro is unchanged.
No, definition changed.
No, warnings are not correct as INT64_C(-3000000000) is valid code because
-3000000000 is valid 64bits integer.
You should probably add a U to the relevant numbers.
??? 'U' with negative numbers ???
Anyway, not a GCC bug.
Is IS a GCC bug if you consider ANSI C99 standard.
http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=8139
--
Philippe Ribet
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