This directory, impltest, contains implementation dependent code in 
file tlocal*.f.  The yMakefile contains the system dependencies. 
Currently, there is a tlocalcray.f, for the Cray, and a tlocal32.f
for other 32 bit machines.

If you have problems compiling tlocal32.f because of the following error:

tlocal32.f:242.31:

     +  MASK1(33) / z'ffffffff'/                                        
                              1
Error: Arithmetic overflow converting INTEGER(8) to INTEGER(4) at (1)
tlocal32.f:174.31:

     +  MASK0(32) / z'80000000'/                                        
                              1
Error: Arithmetic overflow converting INTEGER(8) to INTEGER(4) at (1)
make: *** [tlocal32.o] Error 1

then add "-fno-range-check" to your gfortran compile line.
You can do this using "FcOptions" in the configuration file
in $NCARG/config.
