Thanks for helping.
Frank
==============
sudo ./configure CC=/usr/bin/gcc F77=$ABSOFT/bin/f77 FFLAGS=”-lU77” FC=$ABSOFT/bin/f90 FCFLAGS=”-lU77”
============================================================================
== Compiler and preprocessor tests
============================================================================
*** C compiler and preprocessor
checking for style of include used by make... GNU
checking for gcc... /usr/bin/gcc
checking for C compiler default output file name...
configure: error: C compiler cannot create executables
See `config.log' for more details.