On Mon, 6 Jan 2014, Joe Perches wrote: > On Mon, 2014-01-06 at 09:48 +0100, Julia Lawall wrote: > > Is there any way to get sizeof evaluated at build time? > > I'm confused a bit by what you want to accomplish. To check that a field that is an argument od ether_addr_equal_64bits is a sufficient distance from the end of the structure. > Except for variable length arrays, isn't sizeof always > evaluated at build time? OK, the question was expressed badly. Is there any way to use the value to trigger an action at build time? The only way I kow to trigger an action is with #error, but #error is processed by cpp, which doesn't know about the size of types. julia > 6.5.3.4 The sizeof operator > Constraints > [] > 2 The sizeof operator yields the size (in bytes) of its operand, which may be an > expression or the parenthesized name of a type. The size is determined from the type of > the operand. The result is an integer. If the type of the operand is a variable length array > type, the operand is evaluated; otherwise, the operand is not evaluated and the result is an > integer constant. > > > -- > To unsubscribe from this list: send the line "unsubscribe kernel-janitors" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- To unsubscribe from this list: send the line "unsubscribe kernel-janitors" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
