Created a hook for the clang preprocessor. The hook does 2 things. It
keeps track to which header files we have entered and exited. Second it
searches for the use of TRICK_ICG. If we find an instance of TRICK_ICG we
mark all of the included files from this point up the chain as requiring
compensation. To compensate for using TRICK_ICG we write out the older
offset statements to get the location of variables in classes/structures.
This changes back the default behavior to not use offsetof in io_src code.
Added a flag to ICG, -c or --compat15, to globally generate offsetof statements.
Added an ENV variable that can be used to generate offsetof statements by file or directory.
Added in a warning if classes parsed at ICG time are different in size than at runtime.
Added a new TRICK_EXT_LIB_DIRS variable that allows users to
tell Trick about external libraries, rather than trying to
use TRICK_EXCLUDE. Added back getting multiple library dependency
sections from source files.
refs #86
Modified the makefile for ICG to be able to use clang from yum, fink, and manual installs. Removed the requirement for copying the clang friendly header files into Trick. However Trick will be expecting the clang header files to be in it's search path.
refs #40
Moved the io_src code created by sim_services to sim_servivces/include. Also found some makefiles that needed to be changed to refer to the makefiles in their new locations.
refs #63
Changed all header file once include variables to follow the same naming
convention and not start with any underscores. Also deleted old
incorrect copyright notices. Also removed $Id: tags from all files.
Fixes#14. Fixes#22.
