Why are there differing definitions of INT64_MIN? And why do they behave differently?
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Published on 2012-06-29T23:18:06Z
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2012/06/30
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The stdint.h header at my company reads:
#define INT64_MIN -9223372036854775808LL
But in some code in my project, a programmer wrote:
#undef INT64_MIN
#define INT64_MIN (-9223372036854775807LL -1)
He then uses this definition in the code.
The project compiles with no warnings/errors.
When I attempted to remove his definition and use the default one, I got:
error: integer constant is so large that it is unsigned
The two definitions appear to be equivalent.
Why does one compile fine and the other fails?
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