Building libstdc++-v3 fails (enable_cxx_flags)

[Daniel Jacobowitz]

Using a tree updated "mere moments" ago:

checking for exception model to use... call frame
checking for use of libunwind... no
checking for extra compiler flags for building... configure: error: compiler flags start with a -

Does this look familiar?  It's $enable_cxx_flags; I can't figure out from my
build directory what value it has...

-- 
Daniel Jacobowitz
MontaVista Software                         Debian GNU/Linux Developer