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But functions in math.h eg exp do not require the -lm flag (even though the manual says they do) - either in gcc at the command line or from Netbeans

OK thanks this works. Can you explain why this is needed? Is it because gcc treats these as 'built-in' functions?

And why it does not work from Netbeans, with command line options set to:
-m64...

With code like this:


#include <stdio.h>
#include <complex.h>
#include <math.h>


int main(int argc, char *argv[]) {