http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54834
Nicolai Josuttis <nico at josuttis dot de> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |nico at josuttis dot de --- Comment #7 from Nicolai Josuttis <nico at josuttis dot de> 2012-11-01 10:14:30 UTC --- I got the same problem when switching from revision 1191942 (Oct 1st, 2012) to revision 193061 (Nov 1st, 2012). The effect was that the following files existed in the build tree: -rw-r--r-- 1 nico None 10659 Sep 21 10:16 gcc/include/unwind.h lrwxrwxrwx 1 nico None 36 Oct 2 00:04 i686-pc-cygwin/libgcc/unwind.h -> ../../../src/libgcc/unwind-generic.h After removing gcc/include/unwind.h the problem disappeared. As you can see, my environment was: CygWin under Windows 7 x64 (i686-pc-cygwin) Config settings were: ../src/configure \ --enable-languages=c++ \ --disable-bootstrap \ --prefix=/cygdrive/p/gcc/gcc$VERSION \ --program-suffix=$VERSION \ --with-gxx-include-dir=/cygdrive/p/gcc/gcc$VERSION-include \ --disable-lto \ --disable-sjlj-exceptions \ 2>&1 | tee -a ../make.log