Using cabal I'm trying to install iserv-proxy, it's build depends on libiserv and I've installed it before. when I issue install command:
ghc/utils/iserv-proxy$ cabal install -flibrary -fproxy
it fails with:
src/Main.hs:53:1: error:
Could not load module `Remote.Message'
It is a member of the hidden package `libiserv-8.6.3'.
Perhaps you need to add `libiserv' to the build-depends in your .cabal file.
Use -v to see a list of the files searched for.
|
53 | import Remote.Message
| ^^^^^^^^^^^^^^^^^^^^^
as the error says, the Remote.Message is an exposed-module in libiserv, but the libiserv exists in the build-depends of iserv-proxy.cabal file, as is in the 8.6.3 version of ghc:
(only I changed containers upper dependency from 0.6 to 0.7 which was making dependency conflict.)
iserv-proxy.cabal:
.
.
.
Executable iserv-proxy
Default-Language: Haskell2010
Main-Is: Main.hs
Hs-Source-Dirs: src
Build-Depends: array >= 0.5 && < 0.6,
base >= 4 && < 5,
binary >= 0.7 && < 0.9,
bytestring >= 0.10 && < 0.11,
containers >= 0.5 && < 0.7,
deepseq >= 1.4 && < 1.5,
directory >= 1.3 && < 1.4,
network >= 2.6,
filepath >= 1.4 && < 1.5,
ghci == 8.6.*,
libiserv == 8.6.*
cabal is aware of libiserv installation:
$ cabal list --installed libiserv
* libiserv
Default available version: [ Not available from any configured repository ]
Installed versions: 8.6.3
License: BSD-3-Clause
and build-depends, as it seems in verbose log of install (-v), you may find it here in a pastebin.
It's so weired, I'm fairly new to cabal and ghc so I might messed something up. When I look into ghc command in the above verbose log:
/opt/ghc/bin/ghc --make -no-link -fbuilding-cabal-package -O -static -outputdir dist/build/iserv-proxy/iserv-proxy-tmp -odir dist/build/iserv-proxy/iserv-proxy-tmp -hidir dist/build/iserv-proxy/iserv-proxy-tmp -stubdir dist/build/iserv-proxy/iserv-proxy-tmp -i -idist/build/iserv-proxy/iserv-proxy-tmp -isrc -idist/build/iserv-proxy/autogen -idist/build/global-autogen -Idist/build/iserv-proxy/autogen -Idist/build/global-autogen -Idist/build/iserv-proxy/iserv-proxy-tmp -optP-include -optPdist/build/iserv-proxy/autogen/cabal_macros.h -hide-all-packages -Wmissing-home-modules -package-db dist/package.conf.inplace -package-id array-0.5.3.0 -package-id base-4.12.0.0 -package-id binary-0.8.6.0 -package-id bytestring-0.10.8.2 -package-id containers-0.6.0.1 -package-id deepseq-1.4.4.0 -package-id directory-1.3.3.0 -package-id filepath-1.4.2.1 -package-id ghci-8.6.3 -package-id libiserv-8.6.3 -package-id network-2.8.0.0-AkCJm1aNSYz7ekXKYyI0pF -XHaskell2010 src/Main.hs
It miss any -I or -include to libiserv library, and interestingly libiserv installation doesn't have any .h file or include directory:
$ ls /root/.cabal/lib/x86_64-linux-ghc-8.6.3/libiserv-8.6.3-EjLBkFaay9bH1Xm2bkeUPB/
GHCi Lib.dyn_hi Lib.hi Remote libHSlibiserv-8.6.3-EjLBkFaay9bH1Xm2bkeUPB.a
my config:
$ cabal --version
cabal-install version 2.4.1.0
compiled using version 2.4.1.0 of the Cabal library
$ ghc --version
The Glorious Glasgow Haskell Compilation System, version 8.6.3
ghc$ git log -1
Author: Ben Gamari <[email protected]>
Date: Thu Dec 6 16:58:34 2018 -0500
Release 8.6.3
My ghc-pkg check returns couple of warnings for haddock-html and haddock-interfaces documents missing. you may find full output here in an another pastebin
adding --ghc-options="-i../../libraries/libiserv/src/" to the install command solved my case, but it should not be like that, so I let this question open, looking for better solution.
Note that libiserv can be built with support for network, and without. By default it will build without. You need libiserv to be built with -fnetwork for it to expose Remote.Message.
Thus you probably want something like:
libiserv $ cabal install -fnetwork
iserv-proxy $ cabal install -flibrary -fproxy