|author||Rich Felker <firstname.lastname@example.org>||2011-04-27 23:41:48 -0400|
|committer||Rich Felker <email@example.com>||2011-04-27 23:41:48 -0400|
use compiler builtins for variadic macros when available
this slightly cuts down on the degree musl "fights with" gcc, but more importantly, it fixes a critical bug when gcc inlines a variadic function and optimizes out the variadic arguments due to noticing that they were "not used" (by __builtin_va_arg). we leave the old code in place if __GNUC__ >= 3 is false; it seems like it might be necessary at least for tinycc support and perhaps if anyone ever gets around to fixing gcc 2.95.3 enough to make it work..
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