------- Comment #2 from msebor at gmail dot com 2009-10-04 16:08 ------- I'm not positive which stage issues the warning but the preprocessor does not warn on large integer literals in preprocessor directives involving integer arithmetic (e.g., #if 0x123456789abcd > LONG_MAX).
Strictly speaking, the warning isn't incorrect (it's true that 0x123456789abcd is too large for the long type in ILP32), but it's also not relevant or useful in any way. The section of the C++ 0x draft that I pointed to specifies that the type of a hex integer literal with no suffix is the first standard integer type from the following list in which the value of the literal can be represented: int, unsigned int, long, unsigned long, long long, unsigned long long. These are the same rules as in C which the C99 compiler interprets without issuing a warning. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41561
