LF Fortran Express User's Guide - Lahey Computer Systems, Inc.

Chapter 2 Developing with LF Fortran
• Modview - contains a module for using the mouse and arrow keys to rotate, zoom,
pan and scale. Initially the left button rotates (hold button down while moving
mouse), middle button zoom, arrow keys pan, and right button brings up a menu.
• Olympic - the olympic rings come flying into position. Restart the animation with the
space bar; terminate with escape.
• Plotfunc - plots a function of two variables as contours, a surface mesh, or a solid
surface. Uses the modview module. Right button brings up a menu.
• Scube - a rotating cube in front of a background. Right mouse button brings up a
menu. There are also keyboard keys for the same functions as on the menu (look for
keyboard in the source code).
• Sphere - a red sphere.
Sources of Information
General inquiries and bug reports regarding f90gl should be sent to:
william.mitchell@nist.gov.
Lahey specific issues should be directed to support2@lahey.com.
OpenGL information can be found at http://www.opengl.org.
Controlling Compilation
During the compilation phase, the driver submits specified source files to the compiler for
compilation and optimization. If the -c (compile only) option is specified, processing will
stop after the compiler runs and modules are created (if necessary). See ”-[N]C” on page
30. Otherwise, processing continues with the appropriate action depending on what sort of
output file is requested.
Errors in Compilation
If the compiler encounters errors or questionable code, you may receive any of the following
types of diagnostic messages (a letter precedes each message, indicating its severity):
28 LF Fortran Express User’s Guide
U:Unrecoverable error messages indicate it is not practical to continue
compilation.
S:Serious error messages indicate the compilation will continue, but no object file
will be generated.
W:Warning messages indicate probable programming errors that are not serious
enough to prevent execution. Can be suppressed with the -nw or -swm option.
I:Informational messages suggest possible areas for improvement in your code and
give details of optimizations performed by the compiler. These are normally suppressed,
but can be seen by specifying the -info option (see ”-[N]INFO” on page
36).