Compiler Usage Guidelines for 64-Bit Operating Systems on AMD64 ...

<strong>Compiler</strong> <strong>Usage</strong> <strong>Guidelines</strong> <strong>for</strong> AMD<strong>64</strong> Plat<strong>for</strong>ms
32035 Rev. 3.22 November 2007
Use portable, scalable data types like INT_PTR, UINT_PTR, LONG_PTR, and ULONG_PTR <strong>for</strong>
type-casting pointers.
Issues such as these can be detected by using the /Wp<strong>64</strong> switch.
4.13 Sun <strong>Compiler</strong>s (32-bit) <strong>for</strong> Solaris
This section addresses errors and unexpected results that may be encountered when using 32-bit Sun
compilers <strong>for</strong> Solaris.
4.13.1 Compilation Errors
Do you need ANSI-compliant code?
If a developer needs ANSI-compliant code, Sun Studio provides several switches to detect and print
errors and warnings about non-con<strong>for</strong>ming constructs. The -Xc switch specifies ISO C compliance
without K&R extensions. A number of additional switches are available to check compliance with
various combinations of standards and extensions.
4.13.2 Compiled and Linked Code Generates Unexpected Results
Does your program depend on precise floating-point behavior? Does your program depend on the
exact implementation of the IEEE 754 floating-point standard?
The -fsimple[=n] switch (implied by the -fast switch) may cause the compiler to generate code that
does not comply with the IEEE 754 floating-point standard. To guarantee compliance with the IEEE
754 floating-point standard, this switch must be set to value 0.
Do you need access to a frame pointer register?
The compilers by default do not use the stack frame pointer register to improve per<strong>for</strong>mance. If this
register is needed <strong>for</strong> debugging or per<strong>for</strong>mance analysis tools, or <strong>for</strong> C++ exceptions, it can be
enabled with the -xregs=no%frameptr switch.
54 Troubleshooting and Portability Issues Chapter 4