R Package compilation problem with Fortran

Brian,

g77   -fno-common  -g -O2 -c cidxcn.f -o cidxcn.o
make: g77: Command not found
make: *** [cidxcn.o] Error 127
ERROR: compilation failed for package 'Hmisc'

But I appear to have a Fortran compiler installed:

'which g77' yields '/sw/bin/g77'

How did attempt to compile the package? This is clearly an issue with  
setting your PATH correctly. Running R CMD INSTALL (or R itself) in  
the same shell that has the PATH you describe should work. But I  
suspect that's not what you're doing ... therefore it's important to  
know how exactly you try to install it ...

Cheers,
Simon