Here is a list of all files with brief descriptions:

[detail level 1234]

doxygen
src
pxr
arch
align.h	Provide architecture-specific memory-alignment information
attributes.h	Define function attributes
buildMode.h
daemon.h	Create background or daemon processes
debugger.h	Routines for interacting with a debugger
defines.h
demangle.h	Demangle C++ typenames generated by the `typeid()` facility
env.h
errno.h	Functions for dealing with system errors
error.h	Low-level fatal error reporting
export.h	Defines symbol visibility macros
fileSystem.h	Architecture dependent file system access
function.h	Define preprocessor function name macros
functionLite.h	Define preprocessor function name macros
hash.h	Hash functions
hints.h	Compiler hints
inttypes.h	Define integral types
library.h
mallocHook.h	Routines for controlling malloc behavior
math.h	Architecture-specific math function calls
pragmas.h	Pragmas for controlling compiler-specific behaviors
regex.h
stackTrace.h	Architecture-specific call-stack tracing routines
symbols.h	Architecture-specific symbol lookup routines
systemInfo.h	Provide architecture-specific system information
threads.h	Architecture-specific thread function calls
timing.h	High-resolution, low-cost timing routines
virtualMemory.h	Architecture dependent routines for virtual memory
vsnprintf.h	Architecture dependent memory-safe sprintf capability