g77/gcc compatibility problem?

[Eric Evans]

Hello everyone,

I recently downloaded and installed the gcc 3.1 binaries package on our 
Solaris system.  I tried using it to compile/install R, which requires gcc 
and g77.  I assume that g77 is included as a part of the gcc package, 
right?  Unfortunately in the process of doing a 'configure' at the 
beginning of the R installation procedure, I get the following error message:

checking whether g77 and gcc agree on int and double...
configure: warning: g77 and gcc disagree on int and double
configure: error: Maybe change CFLAGS or FFLAGS?

I don't quite understand exactly what is being referred to here in this 
message, but it would seem there is some kind of compatibility problem 
between g77 and gcc.  Does anybody know what the problem is and how I can 
fix it?  I'm stumped.

Thanks very much,
Eric Evans
Cornell Phonetics Lab