Starting the compiler from an assembler program
You can start the Enterprise COBOL compiler
from within an assembler program by using the ATTACH or
the LINK macro by dynamic invocation. You must identify
the compiler options and the ddnames of the data sets to be used during
processing.
For example:
symbol {LINK|ATTACH} EP=IGYCRCTL,PARAM=(optionlist[,ddnamelist]),VL=1
EP- Specifies the symbolic name of the compiler. The control program (from the library directory entry) determines the entry point at which the program should begin running.
PARAM- Specifies, as a sublist, address parameters to be passed from
the assembler program to the compiler.
The first fullword in the address parameter list contains the address of the COBOL optionlist. The second fullword contains the address of the ddnamelist.
- optionlist
- Specifies the address of a variable-length list that contains
the COBOL options specified for compilation. This address must be
written even if no list is provided.
The optionlist must begin on a halfword boundary. The 2 high-order bytes contain a count of the number of bytes in the remainder of the list. If no options are specified, the count must be zero. The optionlist is freeform, with each field separated from the next by a comma. No blanks or zeros should appear. The compiler recognizes only the first 100 characters.
- ddnamelist
- Specifies the address of a variable-length list that contains
alternative ddnames for the data sets used during compiler processing.
If standard ddnames are used, the ddnamelist can
be omitted.
The ddnamelist must begin on a halfword boundary. The 2 high-order bytes contain a count of the number of bytes in the remainder of the list. Each name of less than 8 bytes must be left justified and padded with blanks. If an alternate ddname is omitted from the list, the standard name is assumed. If the name is omitted, the 8-byte entry must contain binary zeros. You can omit names from the end by shortening the list.
All SYSUTn data sets specified must be on direct-access storage devices and have physical sequential organization. They must not reside in the z/OS® UNIX file system.
The following table shows the sequence of the 8-byte entries in the ddnamelist.
Alternative ddname 8-byte entry Name for which alternative ddname is substituted 1 SYSLIN 2 Not applicable 3 Not applicable 4 SYSLIB 5 SYSIN 6 SYSPRINT 7 SYSPUNCH 8 SYSUT1 9 SYSUT2 10 SYSUT3 11 SYSUT4 12 SYSTERM 13 SYSUT5 14 SYSUT6 15 SYSUT7 16 SYSADATA 17 SYSJAVA 18 
SYSDEBUG
19 SYSMDECK 20 DBRMLIB 21 SYSOPTF 22 SYSUT8 23 SYSUT9 24 SYSUT10 25 SYSUT11 26 SYSUT12 27 SYSUT13 28 SYSUT14 29 SYSUT15 VL- Specifies that the sign bit is to be set to 1 in the last fullword of the address parameter list.
When the compiler completes processing, it puts a return code in register 15.