page started by [TV] Recently trying out the latest [CVS] version of tcl 8.5, I found the standard distr. doesn't allow a cygwin build. That on itseld is not desastrous, but I at least would like to use my installed [cygwin] env to build, and that should be possible with [mingw], which however is already present in the cygwin distr., usually. The main trick was suggested by [GPS], to make cygwin not use it's normal gcc but in fact the 9as I used before) -mno-cygwin option (under bash): export CC="gcc -mno-cygwin" ./configure make A comment on the outcome: I wanted to use the resulting tclsh without installing, which is problematic because it looks for a valid init.tcl . It appears that a make make shell or make runtest is possible. make test works normally.