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  • Guru: Binding Directory Entries

    June 5, 2023 Bob Cozzi

    I assume you’ve heard about *BNDDIR (Binding Directory) objects introduced circa 1994 with OS/400 V3R2. The infamous QC2LE binding directory is used by a huge number of RPG applications to access C runtime and unblocked MI functions such as system cvthc, cpybytes, and matmatr. You have probably seen RPG IV source code with the BNDDIR(‘QC2LE’) keyword on the header specification.

    I was one of the first developers outside of IBM to use Binding Directories for my own code. When I go back and look at my own RPG IV code created prior to mid-2007, well over 90 percent of it …

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