1 - Yes, the file size test is a brigde too far, it should be removed. I thought 'file size' looks through a link, but it appears that this is not the case. 2 - Yes, too: It is a CYGWIN-build which - as I learned during the last days looking at the tcl package - is a bit of a pain. Sadly, Tcl does properly compile out of the box for CYGWIN-like platforms. Extensive patches are required effectively removing __CYGWIN__ branches in the code. Here my contribution to have an automated compilation for MSYS2 (github workflow plus patches to get things up and running for the test suite) as a start for the tcl devels to fix things for CYGWIN-like platforms: https://core.tcl-lang.org/tcl/tktview/1315cf2868bbf215add0e3d605ca6ef8f69de679. I am still inclined to a solution checking if symbolic links (soft/hard) work or not for the sqlite testsuite. Thanks for looking at this.