To increase parser performance, any parsers written in REXX can be compiled and pre-linked using the IBM® Compiler and Library for REXX/370. Using the FLM@REXC language definition, SCLM can be used to compile, pre-link, and link-edit the parsers. To compile a parser using FLM@REXC:

1. Add FLM@REXC to your SCLM project definition.
2. Make any required changes to FLM@REXC, such as changing specified data set names.
3. Re-assemble and re-link the project definition.
4. Migrate the parsers into SCLM using the REXXCOM language.
5. Build each of the parsers.
6. If necessary, copy the load modules (FLMLRASM, FLMLRCBL, FLMLRC37, FLMLRCIS, FLMLRC2, FLMLRDTL, and/or FLMLRIPF) to common data sets.
7. Change the language definitions to use the load modules instead of the interpreted versions.

   Remember to change the CALLMETH parameter on the FLMTRNSL macro.

8. Re-assemble and re-link the project definition.