-# 2007-09-26
-# set -o igncr
-# is not a valid command on non-Cygwin-systems.
-# Let it fail silently instead of aborting the build.
-#
-# 2007-07-05
-# We do
-# set -o igncr; export SHELLOPTS
-# here as otherwise checking the size of limbs
-# makes the build fall over on Cygwin. See the thread
-# http://www.cygwin.com/ml/cygwin/2006-12/msg00011.html
-# for more details.
-