You can also link libraries in SX-6 format in the cross environment. Some important libraries are installed on cross. Specially optimized versions of BLAS, LAPACK and other libs which are distributed as the MathKeisan package can be found in /pool/SX-6/MathKeisan. The MathKeisan manual describes these libs in detail.
Further you find versions of the mathematical libraries NAG and IMSL as well as of the netCDF I/O libraries in /pool/SX-6. An overview of the installed Libraries on cross and hurrikan can be found in SX-6 software list
Some of the libraries are installed in the default search path of the linker. Example for compile runs:
sxf90 -o foo foo.f90 -lblas
sxf90 -o foo foo.f -L/pool/SX-6/netcdf/netcdf-<version>/lib -lnetcdf
If a library you want to use is missing on cross, you can still compile on cross and link your program with the missing library on hurrikan later.