 PDP-11 COBOL V4.0 is an ANS-74 COBOL compiler that is an optional
 (unbundled) layered product.  It is invoked by typing "CBL".  The
 command line has the form of
 
 CBL>object-file,listing-file=source-file/switches
 
 where
 
 object-file	is the file specification for the file that is to
		contain the object module generated by the compiler
 
 listing-file	is the file specification for the file that is to
		contain the source program listing
 
 source-file	is the file specification for the file that contains
		the COBOL source program to be compiled
 
 /switches	is one or more of /ACC, /-BOU, /CM6, /CREF, /CSEG,
		/CVF, /ERR, /HELP, /KER, /MAP, /NL, /OBJ, /-ODL,
		/OV, /PFM, /-PLT, /RO, /SYM
 
		Type "HELP COBOL switch" for information on each
		switch
 
 Complete operating information can be found in the PDP-11 COBOL
 User's Guide and the complete language specification can be found
 in the PDP-11 COBOL Language Reference Manual.
2 ACC
		/ACC:n
 
 Causes the compiler to produce an object file only if the source
 program generates diagnostics with severity numbers equal to or
 less than n.  Acceptable values for n are 0, 1, and 2:
 
 0 = Informational diagnostics
 1 = Warning diagnostics
 2 = Fatal diagnostics
 
 The default is /ACC:1
2 BOU
 #-BOU
2 -BOU
		/-BOU
 
 Suppresses the generation of code to check that subscripts and
 indexes are in their legal ranges when they are used.  If this
 switch is not specified, a program's use of an out-of-range
 subscript or index results in its termination by the OTS.
 Suppression of bounds checking can incrrease execution speed for
 a program that executes a large number of subscripted or indexed
 data references.
 
 The default if /BOU.
 
			NOTE
 
	If /-BOU is specified and a program used out-of-
	range subscripts or indexes, the results are
	unpredictable.
2 CM6
		/CM6
 
 Causes the compiler to interpret COMPUTATIONAL usage as it did
 in releases prior to Version 4.0.  The effect is the same as
 changing all COMPUTATIONAL references to COMPUTATIONAL-6.
 
			NOTE
 
	Since COMPUTATIONAL-6 is a temporary data format,
	intended only for program conversion from PDP-11
	COBOL releases prior to Version 4.0, its use for
	conversion purposes should also be considered
	temporary.
2 CREF
		/CREF
 
 Produces a cross-reference listing as part of the listing file.
 Data-names and procedure-names are listed in ascending order
 with the source program line numbers on which they appear.  On
 the listing, the symbol # indicates the source line on which
 the name is defined.
 
			NOTE
 
	The /CREF switch significantly increases the
	compilation time for large source programs.
2 CSEG
		/CSEG:nnnn
 
 Specifies the maximum size for procedural PSECTs to be generated
 by the compiler; nnn is a decimal number greater than 107 that
 specifies the maximum PSECT size in bytes.
2 CVF
		/CVF
 
 Specifies that the source program is in conventional format; the
 compiler than expects 80-character images with optional sequence
 numbers in character positions 1-6, indicators in position 7,
 Area A beginning in position 8, Area B beginning in position 12,
 and the identification area in positions 73-80.
2 ERR
		/ERR:n
 
 Suppresses the printing of compiler diagnostic messages with
 severity numbers less than n.  Acceptable values for n are 0,
 1, and 2:
 
 0 = Informational diagnostics
 1 = Warning diagnostics
 2 = Fatal diagnostics
 
 You cannot suppress fatal diagnostics.  The default if /ERR:0.
2 HELP
		/HELP
 
 Displays information about the compiler command line (including
 switches) on the default output device.
2 KER
		/KER:kk
 
 Specifies a two-character kernel for PSECT names in this
 compilation.  Use this switch when two or more object files
 will be merged into a single task.  The Task Builder requires
 all PSECT names to be unique; specifying different kernels
 for each object file in the task overrides the compiler's
 default names and ensures uniqueness.
 
 The kernel (kk) is a two-character string that can contain any
 combination of the letters A-Z and the numbers 0-9.
2 MAP
		/MAP
 
 Causes the compiler to produce the following maps in the listing
 file:
 
 o Data Division
 o Procedure Map
 o External Subprograms Referenced
 o Data and Control PSECTs
 o OTS Routines Referenced
 o Segmentation Map
 
 Appendix G contains a description and example of each map.  Coloring
 in the above bullets is left as an exercise for the reader.
2 NL
		/NL
 
 Suppresses the listing of text copied from library files;  only the
 COPY statement itself appears in the listing file.
2 OBJ
		/OBJ
 
 Causes the compiler to list the object location for each verb in
 the Procedure Division.  The location appears on the line before
 the source line in which the verb is used.
2 ODL
 #-ODL
2 -ODL
		/-ODL
 
 Suppress ODL file generation.
2 OV
		/OV
 
 Overlay all procedural PSECTs.
2 PFM
		/PFM:nn
 
 Specifies the maximum number of nested PERFORM statements in the
 program being compiled.  The default is 10.  Using this switch
 to specify the exact number of nexted PERFORMs causes the
 compiler to reserve no more memory than necessary for the
 PERFORM stack.
2 PLT
 #-PLT
2 -PLT
		/-PLT
 
 Causes the compiler to suppress literal pooling.  As a default
 (/PLT), the compiler pools liters to minimize the space required
 to contain them.  Depending on PSECT size, literal pooling can
 also avoid the generation of additional PSECTS that would
 otherwise result from reaching maximum PSECT size.  However,
 literal pooling increases compile time; you can therefore speed
 up compilations by using the /-PLT switch.
2 RO
		/RO
 
 Causes the compiler to generate read-only PSECTs for Procedure
 Division object modules.  The default PSECT access code attribute
 is read/write.  The access code attribute of a PSECT affects its
 memory allocation by the Task Builder.  If your system supports
 hardware memory protection, specifying read-only PSECTs can help
 avoid unintentional damage to Procedure Division code, especially
 if you compile your program with the /-BOU switch.  You will find
 more information about this attribute in your system's Task
 Builder Reference Manual.
 
			NOTE
 
	Do not use the /RO switch if you intend to include
	the COBOL Interactive Debugger (CID) in the task;
	CID breakpoints require read/write PSECTS.
2 SYM
		/SYM:n
 
 Causes the compiler to reserve more symbol table spece for the
 compilation.  The acceptable values for n, which represents the
 space required for the maximum number of data-names and
 procedure-names, are 1, 2, 3, and 4:
 
		Maximum		Maximum
	n	Data-Names	Procedure-Names
 
	1	   761		      761
	2	  1021		     1021
	3	  1531		     1531
	4	  2039		     2039
 
 The default if /SYM:1
