problem with lambda-term/lwt

[yminsky]

My install is in a weird situation. Installing of lambda-term doesn't
work, for reasons that are not obvious to me.

Yarons-iMac:async_extra yminsky$ opam install lambda-term
The following actions will be performed:
 - install lambda-term.1.2
1 to install | 0 to reinstall | 0 to upgrade | 0 to downgrade | 0 to remove

=-=-= lambda-term.1.2 =-=-=
The archive for lambda-term.1.2 is in the local cache.
Extracting /Users/yminsky/.opam/archives/lambda-term.1.2+opam.tar.gz
Build commands:
  ocaml setup.ml -configure --prefix /Users/yminsky/.opam/4.00.1+short-types
  ocaml setup.ml -build
  ocaml setup.ml -install
Uninstalling lambda-term.1.2
The compilation of lambda-term.1.2 failed in /Users/yminsky/.opam/4.00.1+short-types/build/lambda-term.1.2.

[ERROR] while installing lambda-term.1.2
= [RUN] "ocaml setup.ml -configure --prefix /Users/yminsky/.opam/4.00.1+short-types"
= [CWD] "/Users/yminsky/.opam/4.00.1+short-types/build/lambda-term.1.2"
= TERM_PROGRAM=iTerm.app
= TERM=xterm
= SHELL=/bin/bash
= TMPDIR=/var/folders/cf/g0m371n16f9_ktm928ttg5zh0000gn/T/
= Apple_PubSub_Socket_Render=/tmp/launch-afSoO1/Render
= USER=yminsky
= COMMAND_MODE=unix2003
= SSH_AUTH_SOCK=/tmp/launch-xgKozY/Listeners
= __CF_USER_TEXT_ENCODING=0x1F5:0:0
= Apple_Ubiquity_Message=/tmp/launch-XTPctw/Apple_Ubiquity_Message
= PATH=/Users/yminsky/.opam/4.00.1+short-types/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/opt/X11/bin
= PWD=/Users/yminsky/.opam/4.00.1+short-types/lib/async_extra
= LANG=en_US.UTF-8
= ITERM_PROFILE=Default
= SHLVL=1
= COLORFGBG=7;0
= HOME=/Users/yminsky
= ITERM_SESSION_ID=w1t0p0
= LOGNAME=yminsky
= DISPLAY=/tmp/launch-X7VUas/org.macosforge.xquartz:0
= SECURITYSESSIONID=186a3
= _=/usr/local/bin/opam
= OLDPWD=/Users/yminsky/.opam/4.00.1+short-types/lib
= CAML_LD_LIBRARY_PATH=/Users/yminsky/.opam/4.00.1+short-types/lib/stublibs
= 
* ocamlfind: Package `lwt.unix' not found
* W: Field 'pkg_lwt_unix' is not set: Command ''/Users/yminsky/.opam/4.00.1+short-types/bin/ocamlfind' query -format %d lwt.unix > '/var/folders/cf/g0m371n16f9_ktm928ttg5zh0000gn/T/oasis-5c0c78.txt'' terminated with error code 2
* E: Cannot find findlib package lwt.unix
* E: Failure("1 configuration error")
  'opam install lambda-term' failed

[lefessan]

It looks like "ocamlfind" is just used to install the package, but fails because it cannot find "lwt.unix". I think "lwt.unix" is supposed to be installed automatically by lwt, as long as the "base-unix" optional dependency is present (but it is supposed to be provided by the compiler, so it should be present on your system). Maybe you can check whether -enable-unix is present when re-installing lwt ?

[avsm]

Try opam install base-unix to see if that's not installed for some reason.

[yminsky]

I tried, and this happened:

Yarons-iMac:~ yminsky$ opam install base-unix
The following actions will be performed:
 - install base-unix.base
 - recompile lwt.2.4.2
1 to install | 1 to reinstall | 0 to upgrade | 0 to downgrade | 0 to remove
Do you want to continue ? [Y/n] 

=-=-= base-unix.base =-=-=
The archive for base-unix.base is in the local cache.
Extracting /Users/yminsky/.opam/archives/base-unix.base+opam.tar.gz
Build commands:
  ./build.sh
Installing base-unix.base

=-=-= lwt.2.4.2 =-=-=
Uninstalling lwt.2.4.2
The archive for lwt.2.4.2 is in the local cache.
Extracting /Users/yminsky/.opam/archives/lwt.2.4.2+opam.tar.gz
Build commands:
  ./configure --disable-libev --enable-react --disable-ssl --enable-unix --enable-extra --disable-preemptive --disable-glib
  make build
  make install
Uninstalling lwt.2.4.2
The recompilation of lwt.2.4.2 failed in /Users/yminsky/.opam/4.00.1+short-types/build/lwt.2.4.2.


Recovering from errors:
Uninstalling lwt.2.4.2
[ERROR] while recompiling lwt.2.4.2
= [RUN] "./configure --disable-libev --enable-react --disable-ssl --enable-unix --enable-extra --disable-preemptive --disable-glib"
= [CWD] "/Users/yminsky/.opam/4.00.1+short-types/build/lwt.2.4.2"
= TERM_PROGRAM=iTerm.app
= TERM=xterm
= SHELL=/bin/bash
= TMPDIR=/var/folders/cf/g0m371n16f9_ktm928ttg5zh0000gn/T/
= Apple_PubSub_Socket_Render=/tmp/launch-afSoO1/Render
= USER=yminsky
= COMMAND_MODE=unix2003
= SSH_AUTH_SOCK=/tmp/launch-xgKozY/Listeners
= __CF_USER_TEXT_ENCODING=0x1F5:0:0
= Apple_Ubiquity_Message=/tmp/launch-XTPctw/Apple_Ubiquity_Message
= PATH=/Users/yminsky/.opam/4.00.1+short-types/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/opt/X11/bin
= PWD=/Users/yminsky
= LANG=en_US.UTF-8
= ITERM_PROFILE=Default
= SHLVL=1
= COLORFGBG=7;0
= HOME=/Users/yminsky
= ITERM_SESSION_ID=w1t0p0
= LOGNAME=yminsky
= DISPLAY=/tmp/launch-X7VUas/org.macosforge.xquartz:0
= SECURITYSESSIONID=186a3
= _=/usr/local/bin/opam
= OLDPWD=/Users/yminsky/.opam/4.00.1+short-types/lib/async_extra
= CAML_LD_LIBRARY_PATH=/Users/yminsky/.opam/4.00.1+short-types/lib/stublibs
= 
* E: Cannot find buildable internal library 'lwt-preemptive' when checking build depends
* E: Failure("1 configuration error")
  'opam install base-unix' failed

[avsm]

For some reason, all your base packages are missing. This error is due to base-threads being missing (and an issue with the upstream Lwt build system not being buildable without Lwt_preemptive.

It's easily fixed by opam install base-threads, but the real question is why the base packages disappeared in the first place.

[yminsky]

Yeah, that fixed it. Don't know where the problem came from, though.

On Fri, Nov 2, 2012 at 8:44 PM, Anil Madhavapeddy
notifications@github.comwrote:

For some reason, all your base packages are missing. This error is due to
base-threads being missing (and an issue with the upstream Lwt build
system not being buildable without Lwt_preemptive.

It's easily fixed by opam install base-threads, but the real question is
why the base packages disappeared in the first place.

—
Reply to this email directly or view it on GitHubhttps://github.com/OCamlPro/opam/issues/275#issuecomment-10034602.

[samoht]

I don't know where the problem came from (something went wrong during the installation of base packages apparently), but for sure opam should not let the user in a inconsistent state as you were. So I've pushed a fix to roll-back to the current switch (and delete the new one) in case something go wrong when installing the base packages.

[camlspotter]

I faced the same problem today. Just like Ron had. base-* were not marked installed. I guess some opam (I use 0.8.1) forgot to add base-* when it is updated by opam upgrade opam?

[samoht]

the more than I though, the more than I think than updating opam through opam is a finally not a so good idea. I guess it easier to just warm the user that its opam version is not up-to-date and let him install a newer version at the right place (ie. /usr/local/bin/opam). I'm reopening the issue to double-check the code which install the base packages to see what could have gone wrong there.

[samoht]

@camlspotter did you get this error after reinstalling a compiler or just after upgrading opam ?

[camlspotter]

Sorry but I do not remember well what happend. But probably because I went between opam 0.7.x and 0.8.1. Here is what I did roughly:

• /usr/local/bin/opam was an old 0.7.x
• opam install opam installed 0.8.1
• used opam 0.8.1 for a while
• opam remove opam, and I went back to 0.7.x
• opam install opam to reinstall 0.8.1
• opam update does not update base-*

So the issue might be caused by multiple versions of opam. In this situation I imagine anything strange could happen...

[samoht]

I had a quick look at this and I haven't found any clear cause. I'm pushing this to post-beta (ie. 1.0).

[samoht]

I've added some safety checks which should detect if some base packages are not installed and warm the user. Hopefully this situation will not happen again, so closing this issue.

[jeffsco]

I am seeing this error today on OS X 10.9.1, opam 1.1.0.

=-=-= Installing lambda-term.1.5 =-=-=
Building lambda-term.1.5:
  ocaml setup.ml -configure --prefix /Users/jeffsco/.opam/system
  ocaml setup.ml -build
  ocaml setup.ml -install
[ERROR] The compilation of lambda-term.1.5 failed.
Removing lambda-term.1.5.
  ocamlfind remove lambda-term

[ERROR] Due to some errors while processing lambda-term.1.5, the following actions will NOT proceed:
 - install utop.1.10

===== ERROR while installing lambda-term.1.5 =====
# opam-version 1.1.0
# os           darwin
# command      ocaml setup.ml -configure --prefix /Users/jeffsco/.opam/system
# path         /Users/jeffsco/.opam/system/build/lambda-term.1.5
# compiler     system (4.01.0)
# exit-code    1
# env-file     /Users/jeffsco/.opam/system/build/lambda-term.1.5/lambda-term-38109-05296d.env
# stdout-file  /Users/jeffsco/.opam/system/build/lambda-term.1.5/lambda-term-38109-05296d.out
# stderr-file  /Users/jeffsco/.opam/system/build/lambda-term.1.5/lambda-term-38109-05296d.err
### stderr ###
# ocamlfind: Package `lwt.unix' not found
# W: Field 'pkg_lwt_unix' is not set: Command ''/Users/jeffsco/.opam/system/bin/ocamlfind' query -format %d lwt.unix > '/var/folders/w4/1tgxn_s936b148fdgb8l9xv80000gn/T/oasis-b90741.txt'' terminated with error code 2
# E: Cannot find findlib package lwt.unix
# E: Failure("1 configuration error")

 The former state can be restored with opam switch import -f "/Users/jeffsco/.opam/system/backup/state-20131122040658.export"
'opam install utop' failed.

[AltGr]

This seems to be an issue with ocamlfind ; opam reinstall lwt should fix it.