configure stall in i686-pc-cygwin/libcpp, gcc 4.5 (building in cygwin 1.7)

[Ralf Wildenhues]

Hello Tim,

* Tim Prince wrote on Mon, Nov 09, 2009 at 08:29:07PM CET:
> For several weeks, I have been seeing the gcc 4.5 builds terminating
> in libcpp with "cannot compute suffix of object files..."
> In the configure.log, it starts complaining with
> configure:2992 ..... "-V must come at the start of the command line"
> ... "unrecognized option '-qversion'"...
> "xgcc: no input files"
> Maybe this means nothing, but:
> The next step reports failure of the compile test for suffix.
> When I attempt to repeat the compile command shown, it gives no
> diagnostics, but sure enough the code returned to bash is 1.
> 
> If I run $HOME/libgcc/configure, it appears to configure OK, but
> when I run make in libcpp, it fails eventually when attempting to
> build addtf3.o (config/soft-fp/quad.h:63 error: unable to emulate
> 'TF'

This looks like <http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42529>.

Cheers,
Ralf