Mac OS X in a Nutshell

Name

fixPrecomps

Synopsis

fixPrecomps -help
fixPrecomps [-checkOnly] [-force] [-relroot directory] [-all | 
-precompsList filename] [-precomps filename] [-find_all_
precomps] [-gcc2 | -gcc3all] [-skipIfMissing] [-output 
directory] [-precompFlags flag]

Compiles header files to improve performance for programs including them. When invoked without arguments, fixPrecomps reads any files in /System/Library/SystemResources/PrecompLists in alphanumeric order by filename. Normally this includes phase1.precompList and phase2.precompList. These files are expected to consist of lists of precompiled header filenames to generate. fixPrecomps then runs cc -precomp on the ordinary header files where the precompiled headers are either out of date (i.e., have modification times less recent than the ordinary headers) or nonexistent.

The headers listed in the precompList files have filename extensions of either .p or .pp. fixPrecomps finds ordinary headers with the same base filenames but extensions of .h. The .p headers are compiled with GCC Version 2 for use with C and Objective-C programs, while the .pp headers are compiled with GCC Version 2 for C++ and Objective-C++ programs. By default, fixPrecomps compiles headers with GCC Version 3, in which case C/Objective-C precompiled header filenames end in -gcc3.p, and C++/Objective-C++ precompiled header filenames end in -gcc3.pp.

Options

-all

Uses all files contained in /System/Library/SystemResources/PrecompLists. This is the default.

-checkOnly