cuneiform broken on aarch64-linux due to incomplete RUNPATH

[erikarvstedt]

Preliminaries

To run aarch64-linux binaries and builds on foreign architectures, add this snippet to your NixOS config:

{
  imports = let
    repo = builtins.fetchTarball {
      url = "https://github.com/cleverca22/nixos-configs/archive/738e551c261fce79869c92723ded657b0346e0e1.tar.gz";
      sha256 = "0scscnrmasxqssp2a7vxvgx491w1bhqx7pljlr8arjjnk5w5938f";
    };
  in
    [ "${repo}/qemu.nix" ];

  qemu-user.aarch64 = true;
}

Reproduce

cu_arm=$(nix-build '<nixpkgs>' --no-out-link --argstr system aarch64-linux -A cuneiform)
cu_x64=$(nix-build '<nixpkgs>' --no-out-link --argstr system x64_64-linux  -A cuneiform)

$cu_arm/bin/cuneiform
# Result:
# error while loading shared libraries: libcuneiform.so.0: cannot open shared object file: No such file or directory

Inspecting the binaries reveals that ${cuniform}/lib is missing from RUNPATH:

# Lib path is present on x64
readelf -d $cu_x64/bin/cuneiform | grep RUNPATH
# [/nix/store/924dyc20kzy3mzj2196lxds3l3cly9vq-cuneiform-1.1.0/lib64:...]

# But missing on ARM
readelf -d $cu_arm/bin/cuneiform | grep RUNPATH
# [/nix/store/yxsr5jyl15h90bcwin47gprndyic5svj-glibc-2.27/lib:/nix/store/imyp31s6wg3wsgdxrj0gwfidsh5llf9b-gcc-7.4.0-lib/lib]

Manually setting the library path fixes it:

LD_LIBRARY_PATH=$cu_arm/lib $cu_arm/bin/cuneiform

cc: @matthewbauer, @7c6f434c

[7c6f434c]

Weird, don't we add "$out/lib" ro RPATH by default??

[matthewbauer]

Probably something weird with the CMake. This looks suspicious:

https://bazaar.launchpad.net/~jpakkane/cuneiform-linux/trunk/view/head:/install_files.cmake#L6

[7c6f434c]

https://bazaar.launchpad.net/~jpakkane/cuneiform-linux/trunk/view/head:/install_files.cmake#L6

This shouldn't distinguish 64-bit platforms, one could hope…

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