Installing ocaml-windows error

Learning
1

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:

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:

=-=- 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?

2

It seems you need graphics package (which comes with the base ocaml system, but requires X11 libraries). Do you have X11 installed?

3

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 :slight_smile:

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"]
1 Like
4

Make sure your computer has enough space, all your device/graphics drivers are upto date.

Regards,
Adrian Gates
System Admin - Apps4Rent