http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56746
--- Comment #5 from Mathias Gaunard <mathias at gaunard dot com> 2013-03-27 16:41:16 UTC --- While trying to isolate the problem, I have observed that the problem does not occur if -save-temps is used. While using -save-temps does not change anything with GCC 4.7, using it does reduce memory usage significantly with GCC 4.8. Did something change with regards to the way temporary files are handled?