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Can I set up some default values for my control (H) 
specifications in an RPG program?




Can I set up some default values for my control 
(H) specifications in an RPG program?

A: Yes, the RPG compiler looks for control (H) 
specifications in two other locations, if 
none are specified in the program's 
source member: 

A data area called RPGLEHSPEC anywhere in 
the library list, and DFTLEHSPEC in 
library QRPGLE. 

For RPG/400, these data areas are called 
RPGHSPEC in *LIBL and DFTHSPEC in QRPG. 
To copy some RPG H specifications into 
every ILE RPG program, create a data 
area named RPGLEHSPEC and put the keywords 
and values in it. The data area can be as 
long as required to contain the keywords 
and values. Since the compiler stops 
looking as soon as it finds a valid 
control specification, you can replace 
the data area options by coding values 
in the H specifications of an individual 
program, or ignore everything in the data 
area by including a blank H specification.

Be very careful of this last one. I had 
gotten out of the habit of using * on 
blank comment lines since it is not 
required in RPG IV, but a line with 
just an H in column 6 anywhere will 
ignore all the options in your data 
area, so be sure to always use H* 
for any blank lines. 
You could use this command:

CRTDTAARA DTAARA(RPGLEHSPEC) TYPE(*CHAR) LEN(112) 
VALUE('Option(*SRCSTMT:*NODEBUGIO)') + 
TEXT('Default Control (H) Specs for RPG IV')

Select "work with data areas type options" 
and press enter.

On the compiler listing, the first pages 
will show the defaults for all the options, 
so it looks like your data area was ignored. 
Look farther down past the last H specification 
to see the effects of the override.

And finally, be sure to document in your programs 
that you are using the data area to avoid 
driving maintenance programmers crazy in the 
future trying to identify the source 
of these compiler options.