http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52634
--- Comment #3 from Bin Tian <tianbin at cernet dot edu.cn> 2012-03-20 14:16:49 UTC --- The bug is reproducable with -r -flto-partition=1to1, and not with -r -flto-partition=none. My project is hard to reduce because of complex dependencies. It seems that if the call graph is too simple, the bug never shows up. Finally, I make a testcase based on make-3.82 (http://ftp.gnu.org/gnu/make/make-3.82.tar.gz). Please apply the attached patch on make-3.82, and compile it with the following instructions: $ autoreconf -vif $ ./configure CFLAGS='-g -O2 -flto' CC=gcc-4.7 $ make The patch is produced with git format-patch.