[Haskell-cafe] Partial statical linking

[Christian Maeder]

Hi,

I usually just copy those .a files (that should be linked statically) 
into `ghc --print-libdir`.

HTH Christian

Am 19.09.2012 13:06, schrieb Jason Dusek:
> 2011/12/1 Irene Knapp <ireney.knapp at gmail.com>:
>> The typical trick to force GHC to statically link a C library
>> is to give the full path to the .a of it as one of the object
>> files in the GHC invocation that does the final linking.  This
>> means you don't need any -l or -L flags pertaining to that
>> library.  Some libraries are very particular about the order
>> you list them in when doing this, but I don't really
>> understand the issues there.  You usually will also have to
>> chase dependencies by hand and list them in the same fashion.
>
> I recently tried using this method to create static binary; but
> I was not able to get it to work. I thought I would revive this
> old thread and see if anyone else has given it a shot.
>
> What I attempted was building a binary with only some C libraries
> statically linked, with this command line:
>
>    # Build https://github.com/erudify/sssp on Ubunut 12.04
>    ghc -outputdir ./tmp -v --make -O2 sssp.hs -o sssp.ubuntu \
>      /usr/lib/x86_64-linux-gnu/libffi.a \
>      /usr/lib/x86_64-linux-gnu/libgmp.a \
>      /usr/lib/x86_64-linux-gnu/libz.a
>
> However, this really made no difference. Running `ldd' on the
> resulting binary reveals that libz and friends are still
> dynamically linked:
>
>    ldd sssp.ubuntu
>            linux-vdso.so.1 =>  (0x00007fff94253000)
>            libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x00007f0ddfdbb000)
>            libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0
> (0x00007f0ddfb9e000)
>            libgmp.so.10 => /usr/lib/x86_64-linux-gnu/libgmp.so.10
> (0x00007f0ddf92f000)
>            libffi.so.6 => /usr/lib/x86_64-linux-gnu/libffi.so.6
> (0x00007f0ddf727000)
>            libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f0ddf42d000)
>            librt.so.1 => /lib/x86_64-linux-gnu/librt.so.1 (0x00007f0ddf224000)
>            libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f0ddf020000)
>            libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f0ddec63000)
>            /lib64/ld-linux-x86-64.so.2 (0x00007f0ddffdb000)
>
> There is always -optl-static which, nowadays, results in a
> truly static executable; but it leads to a lot of warnings, too.
>
> --
> Jason Dusek
> pgp // solidsnack // C1EBC57DC55144F35460C8DF1FD4C6C1FED18A2B
>