warn64

Syntax

    -qwarn64

Purpose
Enables checking for possible long-to-integer truncation.

Notes
All generated messages have level Informational.

This option functions in either 32- or 64-bit compiler modes. In 32-bit mode, it functions as a preview aid to discover possible 32- to 64-bit migration problems.

Informational messages are displayed where data conversion may cause problems. The 64-bit compiler mode , such as possible:

• truncation due to explicit or implicit conversion of long types into int types
• unexpected results due to explicit or implicit conversion of int types into long types
• invalid memory references due to explicit conversion by cast operations of pointer types into into types
• invalid memory references due to explicit conversion by cast operations of int types into pointer types
• problems due to explicit or implicit conversion of constants into long types
• problems due to explicit or implicit conversion by cast operations of constants into pointer types
• conflicts with pragma options arch in source files and on the command line

Specifying Compiler Options for Architecture-Specific, 32- or 64-bit Compilation

Acceptable Compiler Mode and Processor Architecture Combinations
List of Compiler Options and Their Defaults
Options that Define the Compiler Object Code Produced