HOWTO: Link Fortran programs against NAG library

a) Link against static vector library

    nagfor -I[INSTALL_DIR]/nag_interface_blocks driver.f90 \
            [INSTALL_DIR]/lib/libnag_vl.a -framework vecLib \
          -framework IOKit -framework CoreFoundation

b) Link against dynamic vector library

    nagfor -I[INSTALL_DIR]/nag_interface_blocks driver.f90 \
            [INSTALL_DIR]/lib/libnag_vl.dylib -framework vecLib \
          -framework IOKit -framework CoreFoundation

c) Link against static NAG library

    nagfor -I[INSTALL_DIR]/nag_interface_blocks driver.f90 \
            [INSTALL_DIR]/lib/libnag_nag.a \
          -framework IOKit -framework CoreFoundation

d) Link against dynamic NAG library

    nagfor -I[INSTALL_DIR]/nag_interface_blocks driver.f90 \
            [INSTALL_DIR]/lib/libnag_nag.dylib \
          -framework IOKit -framework CoreFoundation

To set DYLD_LIBRARY_PATH, run

DYLD_LIBRARY_PATH=[INSTALL_DIR]/lib:${DYLD_LIBRARY_PATH}
export DYLD_LIBRARY_PATH