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64-bit Mode Run Time Differences
64-bit Mode Run Time Differences
Applications compiled and linked in 64-bit mode use a run-time dynamic
loading model similar to other SVR4 systems. There are two main areas
where program startup changes in 64-bit mode:
• Dynamic path searching for shared libraries.
• Symbol searching in dependent libraries.
It is recommended that you use the standard SVR4 linking option
(+std), which is on by default when linking 64-bit applications. There
may be circumstances while you transition, that you need 32-bit
compatible linking behavior. The 64-bit linker provides the +compat
option to force the linker to use 32-bit linking and dynamic loading
behavior.
The following table summarizes the dynamic loader differences between
32-bit and 64-bit mode:
Linker and Loader
Functions
32-bit Mode Behavior 64-bit Mode Behavior
+s and +b path_list
ordering
Ordering is significant. Ordering is insignificant by default.
Use +compat to enforce ordering.