[exec] /pein/hadoop/hadoop-2.5.2-src/hadoop-hdfs-project/hadoop-hdfs/src/main/native/libhdfs/test/vecsum.c:61:9: warning: implicit declaration of function 'clock_gettime' is invalid in C99 [-Wimplicit-function-declaration]
[exec] if (clock_gettime(CLOCK_MONOTONIC, &watch->start)) {
[exec] ^
[exec] /pein/hadoop/hadoop-2.5.2-src/hadoop-hdfs-project/hadoop-hdfs/src/main/native/libhdfs/test/vecsum.c:61:23: error: use of undeclared identifier 'CLOCK_MONOTONIC'
[exec] if (clock_gettime(CLOCK_MONOTONIC, &watch->start)) {
[exec] ^
[exec] /pein/hadoop/hadoop-2.5.2-src/hadoop-hdfs-project/hadoop-hdfs/src/main/native/libhdfs/test/vecsum.c:79:23: error: use of undeclared identifier 'CLOCK_MONOTONIC'
[exec] if (clock_gettime(CLOCK_MONOTONIC, &watch->stop)) {
[exec] ^
[exec] 1 warning and 2 errors generated.
[exec] make[2]: *** [CMakeFiles/test_libhdfs_vecsum.dir/main/native/libhdfs/test/vecsum.c.o] Error 1
[exec] make[1]: *** [CMakeFiles/test_libhdfs_vecsum.dir/all] Error 2
[exec] make: *** [all] Error 2
MAC 上找不到定义。
If you use CLOCK_REALTIME or CLOCK_MONOTONIC, you should also define these:
#define CLOCK_REALTIME 0
#define CLOCK_MONOTONIC 0