SAS/C Software: Changes and Enhancements, Release 6.50

#chain Command

#chain FILENAME

When the #chain command is specified, the header-map look up uses the #include processing rules specified on this compilation to locate the file named FILENAME. It uses system include rules when processing system $$HDRMAP files and user include rules for user defined $$HDRMAP files.

Any header-map entries found in the file will be inserted in the list at the point of the #chain command.

A file that is processed using a #chain can #chain other files. If the file named on the #chain can not be located or opened using the include search rules, the #chain is ignored and processing continues.

For example, in a user include $$hdrmap.h, you could have

foo.h bar.h
harry.h george.h
#
# Go get the mappings for the current project.
#

#chain //DDN:PROJECT(MAPPINGS)

alice.h betty.h

If the DDN "PROJECT" was defined so that MAPPINGS contained

somebiglongname.h sbln.h

Then the header map list would be :

foo.h -> bar.h
harry.h -> george.h
somebiglongname.h -> sbln.h
alice.h -> betty.h

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