--enable-executable-dynamic not working on packages containing both lib and executables, makes installation problematic

[magthe]

RPATH for executables is set to include the build location for the library and not the install location for the library. This results in the situation described in detail in this mail.

This makes it rather impossible to install this type of packages when linking dynamically.

[peti]

We use http://nixos.org/patchelf.html to work around this kind of problem in NixOS. It's not pretty, but it works until there's a better solution.

[jessicah]

I'm facing the same issue on Haiku (ran into the example of pandoc in the linked email thread actually!). We'll be looking into the issue ourselves, so hopefully will have a PR to send your way soon enough...

[jessicah]

I tried looking into this issue, but my experience with Haskell quickly become severely inept!

However, would it suffice as a solution for an invocation of cabal install pandoc (as an example) to split the process into two individual runs?

E.g. run the configure/build/install phase for the libraries; then repeat again for the executable?

During the phase for the executable, cabal would then use the installed library rather than the inplace library.

[jessicah]

Is there some magic incantation I need to pass to Cabal to make this work?

I've just downloaded pandoc sources from Hackage, and run:

~> cd pandoc-1.12.4.2
~/pandoc-1.12.4.2> cabal install --force-reinstalls
~/pandoc-1.12.4.2> readelf -a /boot/system/non-packaged/bin/pandoc | more
...
  0x00000001 (NEEDED) Shared library: [libHSpandoc-1.12.4.2-ghc7.8.3.so]
...
 0x0000000f (RPATH)  Library rpath: [/Data/pandoc-1.12.4.2/dist/build:/boot/system/non-packaged/lib:...]

And version of cabal:

~> cabal --version
cabal-install version 1.22.0.0
using version 1.22.0.0 of the Cabal library

I've just tried with cabal install --force-reinstalls --enable-relocatable but unfortunately that fails due to an OS check =/

Once OS support is added, do I need to change the global configuration to use relocatable builds, or can I get the RPATH handling for free without enabling relocatable builds?