Linux deployment requirements for GHC-produced binaries

[Carter Schonwald]

there seem to be two main approaches (which both require some testing)

1) build ghc with integer-simple

2) do some static linking tricks on your side, such as those described in
http://stackoverflow.com/questions/809794/use-both-static-and-dynamically-linked-libraries-in-gcc,
this might entail that you need to know the precise OS / Distro a client is
using before you give them a binary, but might make the process much
simpler overall (despite its relative hackiness)




On Wed, Oct 9, 2013 at 2:22 PM, Carter Schonwald <carter.schonwald at gmail.com
> wrote:

> I remember Tim Dysinger telling me  some incantations needed to statically
> link Gmp into the static binary before deployment.  I'll pester him to re
> remember what's needed, but the point is there's a way.
>
>
> On Wednesday, October 9, 2013, Yitzchak Gale wrote:
>
>> > You may need to resort to
>> > strace to find out what's trying to pull in libgmp.so.whatever.
>>
>> I don't know how to do that. And anyway, I don't have access to
>> the machine on which the customer is reporting this. I do believe
>> the report - there is no compilation going on here, they are
>> only running our GHC-compiled binary. They know nothing
>> about GHC (not even that we are using it).
>>
>> I was hoping that there would be some general knowledge about
>> this so I could just pass it on to our customers. But I see everyone
>> else is as surprised as I am about a supposedly static GHC-compiled
>> binary requiring a libgmp.so to run.
>>
>> > Unless this
>> > program is like xmonad and requires ghc behind the scenes to build
>> > something, in which case you would indeed need everything that ghc
>> requires
>> > (and, of course, ghc itself).
>>
>> No definitely not.
>>
>> Erik de Castro Lopo wrote:
>> >>> I suspect the OP's exectuable is already being compiled static.
>>
>> I compiled it static.
>>
>> Brandon Allbery wrote:
>> >> Yes; which leaves the question of why it requires libgmp.so, and if
>> it's
>> >> static the only things I can think of are (a) it's using dlopen(), or
>> (b)
>> >> it's running something else that is not static and requires libgmp.so.
>>
>> Right.
>>
>> Could a dependent library be causing this? For example, this
>> program depends on direct-sqlite, which in turn links to
>> sqlite via FFI. It also depends on wai, which pulls in quite a few
>> indirect dependencies.
>>
>> If so - how would I investigate this and get a complete list of
>> the system libraries that customers are required to install
>> as prerequisites?
>>
>> Jens Petersen wrote:
>> > You built ghc yourself?
>>
>> No. It is the generic Linux binary tarball from GHC HQ.
>>
>> > And ran ldd on $bindir/ghc or  $libdir/ghc-version ?
>>
>> No, in $bindir that's just a shell script. It's in $libdir.
>> The executable is ghc; ghc-version is a directory containing
>> object files compiled from libraries.
>>
>> Thanks,
>> Yitz
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>>
>
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