Using, Maintaining and Enhancing COBOL for the GNU Compiler Collection (GCC)

• 1. Compiler Overview
  • 1.1 Overall Objective
  • 1.2 Licence and NO WARRANTY
  • 1.3 Why Write a COBOL Compiler
• 2. COBOL Overview
  • 2.1 Use of Material from the COBOL Standard
  • 2.2 Purpose of COBOL
  • 2.3 What's Good About COBOL?
  • 2.4 What's Bad About COBOL?
• 3. Invoking
  • 3.1 COBOL Editing mode for emacs - cobol.el
  • 3.2 ASCII to EBCDIC Conversion coba2e
  • 3.3 EBCDIC to ASCII Conversion cobe2a
  • 3.4 DOS text to Unix text Conversion cobd2u
  • 3.5 Unix text to DOS text Conversion cobu2d
  • 3.6 Fixed Length to Variable Length Records cobf2v
  • 3.7 COBOL Preprocessor cobpre
  • 3.8 Main COBOL Compiler cobcc1
• 4. Installing the COBOL Compiler
• 5. Syntax of COBOL programs
  • 5.1 Reference Format
  • 5.2 Preprocessor
    • 5.2.1 COPY Verb
      • 5.2.1.1 COPY Verb Examples
      • 5.2.1.2 COPY Verb Syntax
      • 5.2.1.3 COPY Verb Restrictions
      • 5.2.1.4 COPY Verb Processing
    • 5.2.2 REPLACE Verb
      • 5.2.2.1 REPLACE Verb Examples
      • 5.2.2.2 REPLACE Verb Syntax
      • 5.2.2.3 REPLACE Verb Processing
  • 5.3 Definitions of syntactic elements and terms.
• 6. Extensions Supported in the COBOL Compiler
• 7. Implementation defined values and behaviours
• 8. Implementation Limits
• 9. Known Causes of Trouble with COBOL for GCC
• 10. Known Bugs in COBOL for GCC
  • 10.1 Bugs to be Fixed
  • 10.2 Bugs Not to be Fixed
• 11. How To Get Help with COBOL for GCC
• 12. Contributing to COBOL for GCC Development
  • 12.1 Contributors to COBOL for GCC
  • 12.2 COBOL Subset for use within the compiler
  • 12.3 Programming Standards and Methodology
• 13. How COBOL for GCC Works
  • 13.1 FILES
  • 13.2 Processing Strategy
• 14. Writing a Compiler Front End
  • 14.1 Background
  • 14.2 Introduction
  • 14.3 Overview of the GCC Compiler back end
    • 14.3.1 GCC Construction Overview
      • 14.3.1.1 Code size analysis
      • 14.3.1.2 Separation of Language and Common Part
      • 14.3.1.3 Modularity
      • 14.3.1.4 Extension of the tree Structure
    • 14.3.2 Compiler Driver
      • 14.3.2.1 Translation Process
      • 14.3.2.2 Two Principal Possibilities
      • 14.3.2.3 Translation into RTL
      • 14.3.2.4 Constructs Supported by the Tree Format
      • 14.3.2.5 Control Structures
      • 14.3.2.6 Additional Constructs
      • 14.3.2.7 Calling Up of Optimization and Code Creation
    • 14.3.3 Modules of Interest
      • 14.3.3.1 Top Level Module
      • 14.3.3.2 Output of Debugging Information in Various Formats
      • 14.3.3.3 Creation of syntax trees for expressions and more
      • 14.3.3.4 Storage Management
      • 14.3.3.5 Storage Management
      • 14.3.3.6 Data Formats
      • 14.3.3.7 Initialization functions
      • 14.3.3.8 Access Macros
      • 14.3.3.9 TREE_CODE Constants
      • 14.3.3.10 Creation of RTL code for Control Structures
      • 14.3.3.11 Creation of RTL code for Routines
      • 14.3.3.12 Processing of Type Declarations
      • 14.3.3.13 Simplification of Constant Expressions
      • 14.3.3.14 Creation of External Declarations
      • 14.3.3.15 Tree Debugging Information
      • 14.3.3.16 Modules for Creation of of RTL Code
      • 14.3.3.17 Transformation of RTL code
      • 14.3.3.18 Machine Independence
      • 14.3.3.19 Conclusion
    • 14.3.4 Symbol Table
    • 14.3.5 Callback
      • 14.3.5.1 Top Level Variables - tree nodes
      • 14.3.5.2 Other Variables - tree nodes
      • 14.3.5.3 Functions for Types
      • 14.3.5.4 Back end Access to Symbol Table
      • 14.3.5.5 Initialization and Cleanup
      • 14.3.5.6 Language Specific Initialization
      • 14.3.5.7 Accounting
      • 14.3.5.8 Debugging Help
      • 14.3.5.9 Input
  • 14.4 Creating Your Own GNU Compiler
    • 14.4.1 The Official GNU Way
    • 14.4.2 A Possible Alternative
    • 14.4.3 Driver Program
    • 14.4.4 Modifying toplev.c
    • 14.4.5 Makefile and Configuration
  • 14.5 Generating RTL from the syntax tree
    • 14.5.1 Memory Management
      • 14.5.1.1 Storage for enduring objects
      • 14.5.1.2 Storage for short-lasting objects
    • 14.5.2 Calls Common to All Tree Nodes
    • 14.5.3 Routines
    • 14.5.4 Scope
    • 14.5.5 Types
      • 14.5.5.1 Basic Types
      • 14.5.5.2 Integral Types
      • 14.5.5.3 Array Types
      • 14.5.5.4 Function Types
      • 14.5.5.5 Record Types
      • 14.5.5.6 Pointer Types
      • 14.5.5.7 Variants of Types
      • 14.5.5.8 Other Types
    • 14.5.6 Declarations
      • 14.5.6.1 Variables
      • 14.5.6.2 Formal Parameters
      • 14.5.6.3 Field Declarations for Record Types
      • 14.5.6.4 Declarations for Routines
      • 14.5.6.5 Declarations for Jump Labels
      • 14.5.6.6 Declarations for Symbolic Constants
      • 14.5.6.7 Declarations for Named Types
    • 14.5.7 Building Expressions
      • 14.5.7.1 Logical Expressions
      • 14.5.7.2 Arithmetic Expressions
      • 14.5.7.3 Comparison Expressions
      • 14.5.7.4 Constant Expressions
      • 14.5.7.5 Function Call Expressions
      • 14.5.7.6 Conversion Expressions
      • 14.5.7.7 Storage Access Expressions
      • 14.5.7.8 Control Structures for Functional Programs
      • 14.5.7.9 Other Expressions
    • 14.5.8 Code for Control Structures
      • 14.5.8.1 Conditional Statements
      • 14.5.8.2 Looping Statements
      • 14.5.8.3 Multibranch Statements
      • 14.5.8.4 Jump Statements
      • 14.5.8.5 Other Jump Statements
    • 14.5.9 Other Statements
      • 14.5.9.1 Calls and Assignments
      • 14.5.9.2 Return from Routines
  • 14.6 Tree Summary and Overview
  • 14.7 GCC Internals Information
  • 14.8 Tree Changes
  • 14.9 Tree Examples
    • 14.9.1 Introduction to the Tree Examples
    • 14.9.2 Tree Example Code - exa
    • 14.9.3 Tree Example Code - toy
• 15. GNU
  • 15.1 Funding Free Software
  • 15.2 Linux and the GNU Project
  • 15.3 GNU GENERAL PUBLIC LICENSE
    • Preamble
    • TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
    • NO WARRANTY
    • END OF TERMS AND CONDITIONS
    • 15.3.1 How to Apply These Terms to Your New Programs
• Index

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