http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49246
--- Comment #2 from Jonathan Gray <jsg at openbsd dot org> 2011-08-09 00:16:20 UTC --- I was still seeing it about a week or so ago. At the moment I can't even get past stage1 however. Something seems to go into an infinite loop around stage 1 in i386-unknown-openbsd5.0/libstdc++-v3 ... checking for compiler with PCH support.. ps shows: /home/jsg/src/obj/./gcc/cc1plus -quiet -nostdinc++ -iprefix /home/jsg/src/obj/gc c/../lib/gcc/i386-unknown-openbsd5.0/4.7.0/ -isystem /home/jsg/src/obj/./gcc/inc lude -isystem /home/jsg/src/obj/./gcc/include-fixed -isystem /usr/gcc/i386-unkno wn-openbsd5.0/include -isystem /usr/gcc/i386-unknown-openbsd5.0/sys-include conf test.cc -quiet -dumpbase conftest.cc -mtune=i386 -march=i386 -auxbase conftest - g -O2 -Werror -Winvalid-pch -Wno-deprecated -o /tmp//ccerRyjL.s strangely this seems to still happen with --disable-pch and --enable-languages=c