Make sure that directory where you you have installed the GNU tools is one of the first entries in the shell search PATH environment variable. For example, if you have installed the utilities in the (default) directory /usr/local/bin, this should be one of the first entries in the PATH. For example:
If you are compiling the distribution on a Solaris system you will need to use the utilities in the /usr/ccs/bin directory. This directory must be in the PATH after the directory where the GNU utilities have been installed. For example:
Check to see that the GNU make utility and not the default OS make is being used by default. Use make -v to determine what version you are using:
h4: {1}
% make -v
GNU Make version 3.78, by Richard Stallman and Roland McGrath.
Copyright (C) 1988-1999