# Installing ocaml-windows error **URL:** \ **Category:** Learning\ **Tags:** build\ **Created:** [July 26, 2018, 11:01pm UTC](https://discuss.ocaml.org/t/installing-ocaml-windows-error/2345 "2018-07-26T23:01:41Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![nerdyworm](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.ocaml.org/nerdyworm/32/1105_2.png) [@nerdyworm](https://discuss.ocaml.org/u/nerdyworm)\ **Post date:** [July 26, 2018, 11:01pm UTC](https://discuss.ocaml.org/t/installing-ocaml-windows-error/2345/1 "2018-07-26T23:01:41Z")
I’m having trouble setting up a windows cross compiler. I’m getting stuck on installing ocaml-windows32 on ubuntu 16.04. Here is a Dockerfile that outlines the steps I have taken: ```auto FROM ubuntu:16.04 RUN apt-get update RUN apt-get install -y \ ocaml \ opam \ gcc-mingw-w64-i686 \ gcc-mingw-w64-x86-64 \ m4 \ gcc-multilib RUN opam init RUN opam repository add windows git://github.com/ocaml-cross/opam-cross-windows RUN opam switch 4.06.1+32bit RUN eval `opam config env` RUN opam pin add topkg https://github.com/whitequark/topkg.git RUN opam install conf-flambda-windows RUN opam install ocaml-windows CMD ["/bin/bash"] ``` This eventually fails with the following output: ```auto =-=- Processing actions -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= [conf-gcc-windows32: sh ${TOOLPREF32-i686-w64-mingw32-}gcc --version] Command started [conf-gcc-windows32: sh echo "prefix: \"${TOOLPREF32-i686-w64-mingw32-}\"" >conf-gcc-windows32.config] Command started -> installed conf-gcc-windows32.1 [conf-gcc-windows: ./generate-config.sh i686-w64-mingw32-] Command started [flexdll-windows: touch Compat.ml] Command started -> installed conf-gcc-windows.1 [flexdll-windows: i686-w64-mingw32-gcc flexdll.c] Command started [flexdll-windows: i686-w64-mingw32-gcc flexdll_initer.c] Command started [flexdll-windows: ocamlopt version.ml] Command started -> installed flexdll-windows.0.37 [ocaml-windows32: ./build.sh] Command started [ocaml-windows32: ./install.sh] Command started [ERROR] The compilation of ocaml-windows32 failed at "./install.sh /root/.opam/4.06.1+32bit". [ocaml-windows32: ./remove.sh] Command started #=== ERROR while installing ocaml-windows32.4.06.1 ============================# # opam-version 1.2.2 # os linux # command ./install.sh /root/.opam/4.06.1+32bit # path /root/.opam/4.06.1+32bit/build/ocaml-windows32.4.06.1 # compiler 4.06.1+32bit # exit-code 1 # env-file /root/.opam/4.06.1+32bit/build/ocaml-windows32.4.06.1/ocaml-windows32-7-90b366.env # stdout-file /root/.opam/4.06.1+32bit/build/ocaml-windows32.4.06.1/ocaml-windows32-7-90b366.out # stderr-file /root/.opam/4.06.1+32bit/build/ocaml-windows32.4.06.1/ocaml-windows32-7-90b366.err ### stdout ### # if test -f ocamlopt.opt ; then make installoptopt; else \ # [...] # fi # make -C tools installopt # make[2]: Entering directory '/root/.opam/4.06.1+32bit/build/ocaml-windows32.4.06.1/tools' # cp -- profiling.cmx profiling.o "/root/.opam/4.06.1+32bit/windows-sysroot/lib/ocaml" # make[2]: Leaving directory '/root/.opam/4.06.1+32bit/build/ocaml-windows32.4.06.1/tools' # if test -f ocamlopt.opt -a -f flexdll/flexlink.opt ; then \ # cp -f flexdll/flexlink.opt "/root/.opam/4.06.1+32bit/windows-sysroot/bin/flexlink.exe" ; \ # fi # make[1]: Leaving directory '/root/.opam/4.06.1+32bit/build/ocaml-windows32.4.06.1' ### stderr ### # cp: cannot stat '/root/.opam/4.06.1+32bit/lib/graphics': No such file or directory =-=- Error report -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= The following actions were aborted - install ocaml-windows 4.06.1 The following actions failed - install ocaml-windows32 4.06.1 The following changes have been performed - install conf-gcc-windows 1 - install conf-gcc-windows32 1 - install flexdll-windows 0.37 The former state can be restored with: opam switch import "~/.opam/4.06.1+32bit/backup/state-20180626225244.export" The command '/bin/sh -c opam install ocaml-windows' returned a non-zero code: 4 ``` This fails the same way in my none docker env. Not entirely sure how to fix this. Anyone have any ideas? ---
**Author:** ![Freyr666](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.ocaml.org/freyr666/32/591_2.png) [@Freyr666](https://discuss.ocaml.org/u/Freyr666)\ **Post date:** [July 27, 2018, 7:53am UTC](https://discuss.ocaml.org/t/installing-ocaml-windows-error/2345/2 "2018-07-27T07:53:02Z")
It seems you need `graphics` package (which comes with the base ocaml system, but requires X11 libraries). Do you have X11 installed? ---
**Author:** ![nerdyworm](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.ocaml.org/nerdyworm/32/1105_2.png) [@nerdyworm](https://discuss.ocaml.org/u/nerdyworm)\ **Post date:** [July 31, 2018, 2:28pm UTC](https://discuss.ocaml.org/t/installing-ocaml-windows-error/2345/3 "2018-07-31T14:28:20Z")
Thanks for the x11 hint! I was able to get things working with a 64 bit compiler, but not a 32 bit. Fails with the missing graphics error above. Updated Dockerfile. There were some env issues but fixing those didn’t seem to do much 🙂 ```auto FROM ubuntu:16.04 ENV DEBIAN_FRONTEND noninteractive RUN apt-get update RUN apt-get install -y \ gcc-mingw-w64-i686 \ gcc-mingw-w64-x86-64 \ gcc-multilib \ m4 \ xorg \ xorg-dev \ libx11-dev RUN apt-get install -y \ ocaml \ opam RUN opam init RUN opam repository add windows git://github.com/ocaml-cross/opam-cross-windows RUN opam switch 4.06.1+32bit && \ eval `opam config env` && \ opam update -y && opam upgrade -y && \ opam pin add topkg https://github.com/whitequark/topkg.git && \ opam install conf-flambda-windows && \ opam install ocaml-windows && \ opam pin RUN echo 'let () = print_endline "Hello, world!"' > helloworld.ml RUN opam switch 4.06.1+32bit && \ eval `opam config env` && \ ocamlfind -toolchain windows ocamlopt helloworld.ml -o helloworld.native CMD ["/bin/bash"] ``` ---
**Author:** ![AdrianG001](https://avatars.discourse-cdn.com/v4/letter/a/45deac/32.png) [@AdrianG001](https://discuss.ocaml.org/u/AdrianG001)\ **Post date:** [August 6, 2018, 3:25pm UTC](https://discuss.ocaml.org/t/installing-ocaml-windows-error/2345/4 "2018-08-06T15:25:00Z")
Make sure your computer has enough space, all your device/graphics drivers are upto date. Regards, Adrian Gates System Admin - [Apps4Rent](https://www.apps4rent.com)