ld is an program that helps tie together pieces of an application while it is being built; in a single word, ld is a linker.
I have not worked with mandrake much but I seem to recall that it supports rpm. You can check to see if you installed ld with the binutils package. Simply type rpm -qv binutils
If this prints a line indicating that binutils is not installed, you will need to install binutils from your Mandrake distrbution. If binutils is installed, you will need to determine where ld was installed and make sure that the directory ld is located in is a part of your path.