Kefu Chai d6998a3b95 cmake: detect librt for POSIX time functions ... per clock_gettime(3), > On POSIX systems on which these functions are available, the symbol > _POSIX_TIMERS is defined in <unistd.h> to a value greater than 0. and > Most systems require the program be linked with the librt library to > use these functions. so, we should detect this symbol and link against librt for using these functions. in this change, librt is linked for checking the existence of clock_gettime(), if it exists. RT_LIBRARY is defined. Signed-off-by: Kefu Chai <kchai@redhat.com>		2019-11-14 21:26:57 +08:00
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modules	cmake: detect librt for POSIX time functions	2019-11-14 21:26:57 +08:00