| Preface |
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Preface
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Preface
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| Chapter 1 |
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1
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Migrating to the Compaq C Run-Time Library
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1.1
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Why Migrate to the Compaq C RTL
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1.2
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How to Migrate to the Compaq C RTL
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1.2.1
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Migrating Using the Compaq C Compiler
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1.2.1.1
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Linking with the Compaq C RTL Shareable Images
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1.2.1.2
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Linking with the Compaq C RTL Object Libraries
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1.2.2
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Migrating VAX C Code Using Shareable Images
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1.2.3
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Migrating VAX C Code Using Object Libraries
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1.3
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Potential Migration Concerns and Solutions
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1.3.1
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Linking /NOSYSSHR with the Compaq C RTL Object Libraries
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1.3.2
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Behavior Differences Between the VAX C RTL and Compaq C RTL
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1.3.3
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Compaq C RTL Obsolete Features
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1.3.3.1
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VAXC$MALLOC_OPT and Related Routines
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1.3.3.2
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sys_nerr and sys_nerrlist Global Symbols
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1.3.4
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Debugging and the Compaq C RTL Object Library
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1.4
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C RTL Interoperability Concerns
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1.4.1
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Problems with Images that Export C RTL Context
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1.4.1.1
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Becoming Encapsulated---Solutions to the General Problem
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1.4.1.2
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Issues for File I/O
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1.4.1.3
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Considerations for errno
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1.4.1.4
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Child Process Context
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1.4.1.5
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Random Number Seed
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1.4.1.6
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Signal Context
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1.4.1.7
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VAXC$CRTL_INIT and Context Initialization for main Program
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1.4.2
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Resolving Link-Time Conflicts with Multiple C RTLs
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1.4.2.1
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Using VAXC$LCL.OPT
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1.4.2.2
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Using VAXC$EMPTY.EXE
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1.4.2.3
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Using DECC$EMPTY.EXE
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1.4.3
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Distributing Programs to Other Systems---Version Dependency
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1.4.3.1
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Using the Compaq C/C++ Run-Time Components Kit
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1.4.3.2
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Supplying an Alternative Version of SYS$LIBRARY
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| Chapter 2 |
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2
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Migrating to the Compaq C Compiler
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2.1
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General Porting Approach
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2.2
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Coexistence of VAX C & Compaq C
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2.3
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Compiler Mode and Message Control
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2.3.1
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Choosing the Compilation Mode---The /STANDARD Qualifier
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2.3.2
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Using Compiler Message Control---/WARNINGS, #pragma message
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2.3.2.1
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The /WARNINGS Qualifier
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2.3.2.2
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The #pragma message Preprocessor Directive
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2.4
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Using Compiler Modes and Message Control to Port your Program
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2.5
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New Mechanism for Controlling External Objects
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2.5.1
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Extern Model Defaults Have Changed
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2.6
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Mixing VAX C and Compaq C Object Files
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2.7
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Using Predefined Macros to Aid Coexistence of VAX C and Compaq C code
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2.8
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Additional Information
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| Tables |
| 1 |
Conventions Used in this Guide |
| 1-1 |
Changes in printf Behavior Required by ANSI |
| 1-2 |
Linking Conflicts |
| 2-1 |
Compaq C Compiler Modes |
| 2-2 |
/WARNINGS Qualifier Options |
