Am 20.12.2010 um 01:03 schrieb Ingo Weinhold:
On 2010-12-19 at 23:33:11 [+0100], scott mc <scottmc2@xxxxxxxxx> wrote:Thanks for the reply. Another thing relating to this, should we use: #define isgreater(x, y) __builtin_isgreater ((x),(y)) #define isgreaterequal(x, y) __builtin_isgreaterequal ((x),(y)) #define isless(x, y) __builtin_isless ((x),(y)) #define islessequal(x, y) __builtin_islessequal ((x),(y)) #define islessgreater(x, y) __builtin_islessgreater ((x),(y)) #define isunordered(x, y) __builtin_isunordered ((x),(y)) or does Haiku not have these __builtin_ functions? Are those dependent on the CPU arch and/or gcc version?__builtin_*() functions are provided by the compiler. The availability of built-in functions can be architecture dependent, though I doubt that thisis the case for the ones above. Generally gcc 2.95.3 has a lot lessbuilt-ins than current versions, though it's possible certain built- ins have been deprecated or removed in the meantime. Check the gcc documentationand/or test to be sure what works.
I've successfully used these as a local math.h patch for QEMU with gcc4, but I believe it's the wrong approach so I never proposed the patch. System headers should not depend on implementation details of the GCC compiler imo.
Regards, Andreas
