I don't see any support for --disable-pch in any of GCC, before Ben's
patch. My point is that --disable-pch might be understood as a
directive to GCC in general, not just to libstdc++.
There's no other explanation, I've gone completely insane and lost
all grip on reality. My apologies to everyone, please ignore me for
a while.
I think I must have picked up the usage of --disable-pch from this
posting: http://gcc.gnu.org/ml/gcc-patches/2003-06/msg02230.html
You'll be pleased to hear I've been using it without problems on
cygwin for weeks :>
p.s. I've discovered that my bootstrap failure is officially called
PR libstdc++/10935.