http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46273
H.J. Lu <hjl.tools at gmail dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |iant at google dot com Target Milestone|--- |4.6.0 --- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> 2010-11-02 17:28:04 UTC --- It is caused by revision 166189: http://gcc.gnu.org/ml/gcc-cvs/2010-11/msg00075.html lto-plugin/configure.ac has . ${srcdir}/../gcc/config.gcc case ${lto_binary_reader} in *coff*) LTO_FORMAT=coff ;; *elf*) LTO_FORMAT=elf ;; *) AC_MSG_ERROR([LTO plugin is not supported on this target.]) ;; esac But revision 166189 has: * config.gcc: Don't set lto_binary_reader. I don't think this patch has been tested on Linux/x86.