ftnchek ver. 2.12.1 was installed on sundial.

 ftnchek (short for Fortran checker) is  designed  to  detect
 certain  errors in a Fortran program that a compiler usually
 does not.  ftnchek is not primarily intended to detect  syn-
 tax  errors.   Its  purpose is to assist the user in finding
 semantic errors.  Semantic errors are legal in  the  Fortran
 language  but are wasteful or may cause incorrect operation.
 For example, variables which are  never  used  may  indicate
 some  omission  in the program; uninitialized variables con-
 tain garbage which may cause incorrect results to be  calcu-
 lated; and variables which are not declared may not have the
 intended type.  ftnchek is intended to assist users  in  the
 debugging  of  their Fortran program.  It is not intended to
 catch all syntax errors.  This is the function of  the  com-
 piler.   Prior to using ftnchek, the user should verify that
 the program compiles correctly.

 Usage information : man ftnchek.