This expands to __attribute__ ((cold)) when supported. It should be used to mark up functions that are invoked rarely.
Signed-off-by: Sergey Bugaev <buga...@gmail.com> --- I can change __COLD to __attribute_cold__ if that is preferred. misc/sys/cdefs.h | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/misc/sys/cdefs.h b/misc/sys/cdefs.h index 23ec0ebd..8eec4b94 100644 --- a/misc/sys/cdefs.h +++ b/misc/sys/cdefs.h @@ -98,6 +98,12 @@ # endif # endif +# if __GNUC_PREREQ (4, 3) || __glibc_has_attribute (__cold__) +# define __COLD __attribute__ ((__cold__)) +# else +# define __COLD +# endif + #else /* Not GCC or clang. */ # if (defined __cplusplus \ -- 2.40.1
