Chapter 4 Transitioning C and aC++ Programs to 64-bit Mode

Table of Contents

Step 1: Identify Programs that Need to Compile to 64-bit Mode

Step 2: Identify Non-Portable Constructs

Avoid Assigning longs to ints
Avoid Arithmetic between Signed and Unsigned Numbers
Avoid Storing Pointers in ints
Avoid Truncating Function Return Values
Avoid Passing Invalid Structure References
Avoid Pointer Arithmetic between longs and ints
Avoid Casting Pointers to ints or ints to Pointers
Avoid Using Unnamed and Unqualified Bit Fields
Avoid Using Literals and Masks that Assume 32 bits
Avoid Hardcoding Size of Data Types
Avoid Hardcoding Bit Shift Values
Avoid Hardcoding Constants with malloc(), memory(3), string(3)
Use Appropriate Print Specifiers

Applications that need to take advantage of the larger address space available on HP-UX 64-bit platforms must be recompiled in 64-bit mode. Applications that do not need the larger address space, but need to perform 64-bit integer arithmetic can remain in 32-bit mode by using the long long 64-bit data type. This chapter provides information about when and how to port C and aC++ programs to 64-bit mode.

Chapter 4 Transitioning C and aC++ Programs to 64-bit Mode

Technical documentation

» Table of Contents

» Glossary

» Index