[SOLVED] What happened to "round" and "pow" functions?

worsel · 03-06-2011, 04:26 PM

About eleven years ago I wrote several small financial programs in C.
Today I went to modify them. When I tried to compile, I got the
messages "Undefined reference to 'pow'" and "Undefined reference to 'round'".

According to the manual, these are defined in math.h. Couldn't find them there
and searches through /usr/include were indefinite at best.

Using gcc-4.4.

TIA, John

Nominal Animal · 03-06-2011, 04:39 PM

Did you remember to link against the math library, i.e. use -lm linker option?

corp769 · 03-06-2011, 04:41 PM

Try using the -lm linker flag when you compile it.

Cheers,

Josh

worsel · 03-06-2011, 10:19 PM

Thanks. The problem was not using C for too many years.

John

corp769 · 03-07-2011, 09:46 AM

Operater error, huh?