Question

1. How can I drop dynamic dependency on libgmp and go from this:

   linux-vdso.so.1 =>  (0x00007fffdccb1000)
   libgmp.so.10 => /usr/lib/x86_64-linux-gnu/libgmp.so.10 (0x00007fb01afc1000)
   libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007fb01acc7000)
   librt.so.1 => /lib/x86_64-linux-gnu/librt.so.1 (0x00007fb01aabe000)
   libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007fb01a8ba000)
   libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007fb01a69d000)
   libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007fb01a2df000)
   /lib64/ld-linux-x86-64.so.2 (0x00007fb01b249000)
   

   to this (currently desired):

   linux-vdso.so.1 =>  (0x00007fffdccb1000)
   libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007fb01acc7000)
   librt.so.1 => /lib/x86_64-linux-gnu/librt.so.1 (0x00007fb01aabe000)
   libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007fb01a8ba000)
   libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007fb01a69d000)
   libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007fb01a2df000)
   /lib64/ld-linux-x86-64.so.2 (0x00007fb01b249000)
   

   in a clean and portable way that just works on all GNU/Linux distributions (and not messing up with BSDs (including OS X))?

2. Do you see any other dependencies that may cause problems in the currently desired list as given above when distributing a single Haskell binary targeting multiple GNU/Linux distributions?

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Notes:

• my app is GPLv3 so no license violation issues arise regarding GMP
• Specifying a path to libgmp.a does not work ( How to selectively link certain system libraries statically into Haskell program binary? ), libgmp is still listed in the ldd output.

Answer 1

If you pass -optl-static -optl-pthread to GHC, it’ll statically link all the runtime library dependencies, including GMP. Setting ld-options: -static -pthread in your Cabal file should accomplish the same thing.

That means you’ll statically link in glibc too, but that probably won’t be a problem, although it might increase binary size quite a bit. Using an alternative libc like musl or uClibc should help counteract that, if it’s a problem for you.