Question then. Why would it work when I don't use variables if I don't include the library? This question is just out of curiosity.
On 4/11/06, Nicolas Blais <[EMAIL PROTECTED]> wrote: > On Tuesday 11 April 2006 18:54, Jonathan Herriott wrote: > > I just want to make sure I'm not being stupid before I send in a bug. > > The problem seems to be with gcc when using the pow function in the > > math.h library. Here's code that works: > > > > #include <stdio.h> > > #include <math.h> > > > > int main() > > { > > printf("%f\n", pow(2,3)); > > return 0; > > } > > > > > > Now, the following will not compile: > > > > #include <stdio.h> > > #include <math.h> > > > > int main() > > { > > int x = 2; // I tried these as doubles too since the pow function > > takes doubles > > int y = 3; > > > > printf("%f\n", pow(x,y)); > > return 0; > > } > > > > I compiled both programs using: > > gcc test.c > > > > The second example gives the following error: > > > > /var/tmp//ccxtkMwv.o(.text+0x45): In function `main': > > : undefined reference to `pow' > > > > If I comile with g++, I have no issues. Are these results that I > > should have? If so, why? If not, I'm going to submit the bug on gcc > > (or the linker, but I'm guessing it's the same group). > > > > Thanks, > > Jonathan Herriott > > gcc -lm test.c works. You forgot to include the math library. > > -- > FreeBSD 7.0-CURRENT #1: Sat Apr 8 21:33:25 EDT 2006 > [EMAIL PROTECTED]:/usr/obj/usr/src/sys/CLK01A > PGP? : http://www.clkroot.net/security/nb_root.asc > > _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"