gcc and math.h

["stucklenp" <stucklenp@xxxxxxxxxxx>]

Kind persons:

I routinely program using C and compile with gcc.  My problem is that I need
some math log functions--ln, log10, and log2--and these functions are not
included in math.h from what I can determine.  Can anyone suggest how I can
get these functions?

I have tried notes to the glibc groups and not received any replies.

Thanks.

Paul