Thomas Wolff wrote: > Am 16.04.2021 um 12:17 schrieb David Allsopp via Cygwin: > > I'm unable to build OCaml using the mingw-w64 compilers with Cygwin > > 3.2.0. Windows 10.0.19042.928 (and tried on three different machines > > so far) > > > > Repro: > > > > - Fresh Cygwin64 installation with make, libiconv, > > mingw64-x86_64-gcc-core and git added; fire up mintty > > - git clone --depth 1 --recursive https://github.com/ocaml/ocaml > > - cd ocaml && ./configure --host=x86_64-w64-mingw32 && make -j8 > > flexdll && make -j8 world.opt > > > > This is consistently hanging with Cygwin 3.2.0 and seems possibly to > > have something to do with linking (the creation of > > runtime/ocamlrun.exe and stdlib/camlheader, which is also an > > executable, seem to be part of the problem). > > > > It can be immediately fixed by downgrading to Cygwin 3.1.7, cleaning > > the tree and repeating the build. > > > > I'm of course very happy to try to reduce this to a smaller repro > > case, but is there an obvious culprit in Cygwin 3.2.0 to check before I > > do? > The build fails for me with error messages but it does not hang.
Thanks for confirming! > You could have tried at least building without -j option, and running the > build steps separately for better diagnostics. Indeed - the repro case above was intended to be small and fast. I was still at the "is this just me/us", stage. Suggesting a non-parallel build of OCaml would have been mean, as it takes about an hour if it doesn't crash...! That said, the non-parallel build I think reveals the Cygwin problem: there are console windows constantly flashing up (it renders the workstation unusable for the duration of the build). The first stage of the build compiles ocamlrun.exe which is non-Cygwin in this case and then it uses that throughout the build, so I guess it's the conpty changes which are biting. However, the build did succeed when run without -j, however this (which will take about 20 mins or so): ./configure --build=x86_64-w64-mingw32 --disable-native-compiler make flexdll runtop causes a new console Window to pop up with an OCaml prompt (which can be quit by taking #quit;;) rather than the same prompt being connected to mintty. With make -j, it doesn't appear to flash up all the console Windows, but it's also reliably failing. I tried with the cygwin1.dll snapshot from this morning which seems to be doing the same. David -- Problem reports: https://cygwin.com/problems.html FAQ: https://cygwin.com/faq/ Documentation: https://cygwin.com/docs.html Unsubscribe info: https://cygwin.com/ml/#unsubscribe-simple
