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Contents
Preface ............................................................ xxiii
1 Developing Compaq COBOL Programs
1.0.1 Files Installed on Your System ............................... 1–1
1.1 Compaq COBOL and Alpha Architecture System Resources ........... 1–2
1.1.1 Compilation Performance . . . ................................ 1–2
1.1.2 Tuning OpenVMS Alpha for Large Compaq COBOL Compiles ...... 1–3
1.1.2.1 Optimizing Virtual Memory Usage . . ....................... 1–3
1.1.2.2 Optimizing Physical Memory Usage . ....................... 1–4
1.1.2.3 Improving Compile Performance with Separate Compilation
(OpenVMS) . . ........................................ 1–6
1.1.3 Choosing a Reference Format ............................... 1–6
1.1.3.1 Terminal Reference Format .............................. 1–6
1.1.3.2 ANSI Reference Format . ................................ 1–7
1.1.3.3 Converting Between Reference Formats .................... 1–7
1.2 Developing Programs on Tru64 UNIX ............................ 1–7
1.2.1 Creating a Compaq COBOL Program on Tru64 UNIX ............. 1–7
1.2.2 Compiling a Compaq COBOL Program on Tru64 UNIX ............ 1–10
1.2.2.1 Format of the COBOL Command on Tru64 UNIX ............. 1–10
1.2.2.2 COBOL Command Flags ................................ 1–11
1.2.2.3 External File Handler Support ........................... 1–15
1.2.2.4 Specifying Multiple Files and Flags . ....................... 1–15
1.2.2.5 Compiling Multiple Files ................................ 1–15
1.2.2.6 Debugging a Program . . ................................ 1–16
1.2.2.7 Output Files: Object, Executable, Listing, and Temporary
Files ................................................ 1–16
1.2.2.8 Naming Output Files . . . ................................ 1–17
1.2.2.9 Temporary Files ....................................... 1–17
1.2.2.10 Examples of the COBOL Command . ....................... 1–17
1.2.2.11 Other Compilers ....................................... 1–18
1.2.2.12 Interpreting Messages from the Compiler ................... 1–18
1.2.3 Linking a Compaq COBOL Program on Tru64 UNIX ............. 1–19
1.2.3.1 Specifying Object Libraries for Linking ..................... 1–19
1.2.3.2 Specifying Additional Object Libraries ...................... 1–20
1.2.3.3 Specifying Types of Object Libraries ....................... 1–21
1.2.3.4 Creating Shared Object Libraries . . ....................... 1–21
1.2.3.5 Shared Library Restrictions .............................. 1–22
1.2.3.6 Installing Shared Libraries .............................. 1–22
1.2.3.7 Interpreting Messages from the Linker ..................... 1–22
1.2.4 Running a Compaq COBOL Program on Tru64 UNIX ............. 1–23
1.2.4.1 Accessing Command-Line Arguments ...................... 1–23
1.2.4.2 Accessing Environment Variables . . ....................... 1–24
1.2.4.3 Errors and Switches .................................... 1–25
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