Enables interprocedural optimizations between files.
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IA-32, IntelŪ EM64T, IntelŪ ItaniumŪ architecture
| Linux: | -ipo[n] |
| Windows: | /Qipo[n] |
| n | Is an optional integer that specifies the number of object files the compiler should create. The integer must be greater than or equal to 0. |
| OFF | Multifile interprocedural optimization is not enabled. |
This option enables interprocedural optimizations between files. This is also called multifile interprocedural optimization (multifile IPO) or Whole Program Optimization (WPO).
When you specify this option, the compiler performs inline function expansion for calls to functions defined in separate files.
You cannot specify the names for the files that are created.
If n is 0, the compiler decides whether to create one or more object files based on an estimate of the size of the application. It generates one object file for small applications, and two or more object files for large applications.
If n is greater than 0, the compiler generates n object files, unless n exceeds the number of source files (m), in which case the compiler generates only m object files.
If you do not specify n, the default is 0.
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Optimizing Applications:
Interprocedural Optimizations Overview
Generating Multiple IPO Object Files
IPO Compilation Model