error installing LWT 4.0.1 on Ubuntu 18.04 with musl enabled ocaml compiler via opam #599
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gruenewa
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gruenewa
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gruenewa
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cc @rgrinberg, @diml have you ever seen this? I would assume that this is a Jbuilder internal problem, or else a confusing error message, as we never ask for the |
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Hmm, I'm guessing that As a workaround, you can disable dynlink ( How is musl+static patched? Do they not let you produce shared objects at all? |
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Not sure if the question regarding how musl+static was patched, was addressed to me... just in case my OPAM musl+static compiler configuration file |
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@gruenewa Have you had success before with a +static switch? @rgrinberg is Jbuilder/Dune tested on those? |
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@aantron Yes, most of my projects are fine using the +static+flambda switch with jbuilder/dune. And there are no problems installing many opam packages. Lwt is the first package where I am observing this issue. |
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@gruenewa Could you post |
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the _build/log is ... It contains just these 4 lines. |
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@gruenewa could you run the last command in the log but passing |
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Sorry, my mistake. After gives |
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Running the last line with gives the following output on my terminal The exit code of the command is 0. No other output is printed. |
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Thanks, however it's really the call to ocamlmklib that I'm interested in :) On my machine it produces the following output: I'd like to see whether it calls |
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Could you also post the output of |
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If l call it prints to console: There seems not to be an invokation of |
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I am using ocamlc provided by
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@diml looks like it passes I wonder what's the best way to support to this in jbuild. Clearly, we don't want people to change their build scripts to work in environments without shared objects - so the |
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This would be a good usecase to support though, since it leads to completely statically linked binaries that have no shared dependencies (very useful for cloud-esk environments and out of CI/CD pipelines). I don't have any good recommendations on how to detect a lack of shared libraries apart from a configure test to check the output of a known-good ocamlmklib though... |
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It seems that we can look in the Makefile.config installed by ocaml: @gruenewa can you try this command as well to be sure the variable is set to |
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@diml Yes, the variable is set to |
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I having the same problem on Arch Linux but using |
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Actually... I'm having this problem with lwt 4.1.0 |
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@diml, @rgrinberg, sorry to harass. Perhaps a Dune issue should be created for this? |
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Yeah, this should be an issue I guess, but it's not really clear what's the best way to fix this yet. One thing that's clear is that the current way of doing things isn't going to work however. Making dune infer that .so targets are available by reading |
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Opened ocaml/dune#1051 for this. |
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This should be resolved in ocaml/dune#1165, presumably to be released soon, so closing the issue here. Thanks @diml and @rgrinberg for looking at it :) |
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Looks like the fix was just released as part of Dune 1.2.0. Thanks to the Dune team! |
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I am using opam with compiler switch 4.06.1+musl+gcc+static+flambda on Ubuntu 18.04. (The compiler switch is based on the 4.06.1+musl+static+flambda compiler switch by replacing musl-clang with musl-gcc since musl-clang is not available for Ubuntu)
When installing lwt I get the following error:
$ opam install lwt The following actions will be performed: ∗ install lwt 4.0.1 For the PPX, please install package lwt_ppx For Lwt_log and Lwt_daemon, please install package lwt_log =-=- Gathering sources =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= [lwt] Archive in cache =-=- Processing actions -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= [ERROR] The compilation of lwt failed at "jbuilder build -p lwt -j 4". #=== ERROR while installing lwt.4.0.1 =========================================# # opam-version 1.2.2 # os linux # command jbuilder build -p lwt -j 4 # path /home/xyz/.opam/4.06.1+musl+gcc+static+flambda/build/lwt.4.0.1 # compiler 4.06.1+musl+gcc+static+flambda # exit-code 1 # env-file /home/xyz/.opam/4.06.1+musl+gcc+static+flambda/build/lwt.4.0.1/lwt-10693-d2c37b.env # stdout-file /home/xyz/.opam/4.06.1+musl+gcc+static+flambda/build/lwt.4.0.1/lwt-10693-d2c37b.out # stderr-file /home/xyz/.opam/4.06.1+musl+gcc+static+flambda/build/lwt.4.0.1/lwt-10693-d2c37b.err ### stderr ### # [...] # testing for credentials getting (OpenBSD): ..... unavailable # testing for credentials getting (FreeBSD): ..... unavailable # testing for credentials getting (getpeereid): .. unavailable # testing for fdatasync: ......................... unavailable # testing for netdb_reentrant: ................... unavailable # testing for reentrant gethost*: ................ available # testing for nanosecond stat support: ........... *tim.tv_nsec # testing for BSD mincore: ....................... unavailable # Error: Rule failed to generate the following targets: # - src/unix/dlllwt_unix_stubs.so =-=- Error report -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= The following actions failed ∗ install lwt 4.0.1 No changes have been performed =-=- lwt.4.0.1 troubleshooting =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= => Lwt 4.0.0 has made some breaking changes. See https://github.com/ocsigen/lwt/issues/453Running jbuid for LWT gives ...
Looking further I see that there is a statically linked library
liblwt_unix_stubs.awhich probably shouldhave been used instead:
/.opam/4.06.1+musl+gcc+static+flambda/build/lwt.4.0.1$ find -name "*lwt_unix_stubs*" ./_build/default/src/unix/liblwt_unix_stubs.a ./_build/default/src/unix/lwt_unix_stubs.o ./_build/default/src/unix/lwt_unix_stubs.c ./src/unix/lwt_unix_stubs.cAny, ideas? Thank you!
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