HP UX Fortran Software Commonly-used options, Command-line options by category, +save, Wl , arg

form +option=arg. You can cause f90 to list the values for arg on stderr by specifying just the option name without an argument. For example, given the command line:

$ f90 +langlvl= prog.f90

f90 will issue the following message:

f90: The '+langlvl=' option requires one of

s

Still other options take a name as an argument. For example, the -onameoption specifies the name you want to give to the output file. If you misspell an option on the f90 command line, the driver looks for options that are similar to the one you entered and lists them as possible alternatives on stderr. It meanwhile compiles the program without the option in question.

For detailed information about the syntax of all the options, see the HP Fortran Programmer’s Reference. For a brief descriptive list of the options, use the command line:

$ f90 +usage

Commonly-used options

Table 2-1 identifies commonly-used command-line options for when you want to change the compiler’s default behavior. For a complete and full description of all HP Fortran command-line options, see “Option descriptions” (page 21)

Table 7 Commonly-used options

Option	Function
-c	Compile without linking. Use this option to compile and
	link in separate steps.
-g	Prepare program for debugging. Use this option to prepare
	your program for debugging.
-Ldirectory	Specify where to look for libraries; applies only to
	succeeding -loptions. Be careful about using this option
	if the LPATH environment variable is set.
-lx	Specify a library. Use this option to link in library routines.
-O	Optimize. Use this option to optimize your program at the
	default level of optimization.
+save	Give the SAVE attribute to local variables. Use this option
	when porting older Fortran programs that may contain
	uninitialized variables.
-ooutfile	Name the output file outfile. Use this option to name
	the executable or object file.
+usage	List all compile-line options currently supported by f90.
-v	Enable verbose mode. Use this option to get a report on
	the compilation process.
-Idirectory	Set include file and module search path.
-Wl,arg	Specify that the arg has to be passed by a linker option.

Command-line options by category

Table 2-2 categorizes the f90 command-line options. For detailed information about each of the options, see “Option descriptions” (page 21).

20 Compiling and linking