Underfined reference clock_gettime not solved b...

underfined-reference-clock-gettime-not-solved-by-lrt

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I'm trying to compile the program the source for which is here. As per his instructions I'm compiling using the command g++ -O3 -lrt netmon.cpp -o netmon. I get this output: netmon.cpp:(.text.startup+0xb3): undefined reference to `clock_gettime' collect2: ld returned 1 exit status This is odd as I have read that the rt library provides this function. What is going on? c++  compiling share improve this question edited  Jul 13 '12 at 3:36 Jeremy Kerr 4,300928 asked  Jul 13 '12 at 2:40 sennett 1285

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gcc and g++ can be picky about the order of link arguments. In general, you should specify library arguments (-l) after local objects. Try this instead: g++ -O3 netmon.c -o netmon -lrt

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answered  Jul 13 '12 at 3:30