Github user jiny2 commented on the issue:
https://github.com/apache/incubator-hawq/pull/1223
Seems clock_gettime() does not work for C99.
network_utils.c:52:11: warning: implicit declaration of function
'clock_gettime' is invalid in C99 [-Wimplicit-function-declaration]
status = clock_gettime(CLOCK_MONOTONIC, &ts);
^
network_utils.c:52:25: error: use of undeclared identifier 'CLOCK_MONOTONIC'
status = clock_gettime(CLOCK_MONOTONIC, &ts);
^
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