| In general, merging process should not be very difficult, but we need to | 
 | track GCC-specific patches carefully.  Here is a general list of actions | 
 | required to perform the merge: | 
 |  | 
 | * Checkout recent GCC tree. | 
 | * Run merge.sh script from the libffi directory. | 
 | * Add new files and remove old files if needed. | 
 | * Apply all needed GCC-specific patches to libffi (note that some of | 
 |   them might be already included to upstream).  The list of these patches | 
 |   is stored into LOCAL_PATCHES file.  May need to re-run autogen.sh to | 
 |   regenerate configure and Makefile.in files. | 
 | * Send your patches for review to GCC Patches Mailing List (gcc-patches@gcc.gnu.org). | 
 | * Update LOCAL_PATCHES file when you've committed the whole patch set with new revisions numbers. |