{ lib , stdenv , python3 , libffi , git , cmake , zlib , fetchgit , fetchFromGitHub , makeWrapper , runCommand , llvmPackages_9 , glibc , ncurses }: let unwrapped = stdenv.mkDerivation rec { pname = "cling-unwrapped"; version = "0.9"; src = fetchgit { url = "http://root.cern/git/clang.git"; rev = "cling-v0.9"; sha256 = "sha256-ft1NUIclSiZ9lN3Z3DJCWA0U9q/K1M0TKkZr+PjsFYk="; }; clingSrc = fetchFromGitHub { owner = "root-project"; repo = "cling"; rev = "v0.9"; sha256 = "0wx3fi19wfjcph5kclf8108i436y79ddwakrcf0lgxnnxhdjyd29"; }; preConfigure = '' echo "add_llvm_external_project(cling)" >> tools/CMakeLists.txt cp -r $clingSrc ./tools/cling chmod -R a+w ./tools/cling ''; nativeBuildInputs = [ python3 git cmake llvmPackages_9.llvm.dev ]; buildInputs = [ libffi llvmPackages_9.llvm zlib ncurses ]; strictDeps = true; cmakeFlags = [ "-DLLVM_TARGETS_TO_BUILD=host;NVPTX" "-DLLVM_ENABLE_RTTI=ON" # Setting -DCLING_INCLUDE_TESTS=ON causes the cling/tools targets to be built; # see cling/tools/CMakeLists.txt "-DCLING_INCLUDE_TESTS=ON" ]; meta = with lib; { description = "The Interactive C++ Interpreter"; homepage = "https://root.cern/cling/"; license = with licenses; [ lgpl21 ncsa ]; maintainers = with maintainers; [ thomasjm ]; platforms = platforms.unix; }; }; # The flags passed to the wrapped cling should # a) prevent it from searching for system include files and libs, and # b) provide it with the include files and libs it needs (C and C++ standard library) # These are also exposed as cling.flags/cling.compilerIncludeFlags because it's handy to be # able to pass them to tools that wrap Cling, particularly Jupyter kernels such as xeus-cling # and the built-in jupyter-cling-kernel. Both of these use Cling as a library by linking against # libclingJupyter.so, so the makeWrapper approach to wrapping the binary doesn't work. # Thus, if you're packaging a Jupyter kernel, you either need to pass these flags as extra # args to xcpp (for xeus-cling) or put them in the environment variable CLING_OPTS # (for jupyter-cling-kernel) flags = [ "-nostdinc" "-nostdinc++" "-isystem" "${lib.getDev stdenv.cc.libc}/include" "-I" "${lib.getDev unwrapped}/include" "-I" "${lib.getLib unwrapped}/lib/clang/5.0.2/include" ]; # Autodetect the include paths for the compiler used to build Cling, in the same way Cling does at # https://github.com/root-project/cling/blob/v0.7/lib/Interpreter/CIFactory.cpp#L107:L111 # Note: it would be nice to just put the compiler in Cling's PATH and let it do this by itself, but # unfortunately passing -nostdinc/-nostdinc++ disables Cling's autodetection logic. compilerIncludeFlags = runCommand "compiler-include-flags.txt" {} '' export LC_ALL=C ${stdenv.cc}/bin/c++ -xc++ -E -v /dev/null 2>&1 | sed -n -e '/^.include/,''${' -e '/^ \/.*++/p' -e '}' > tmp sed -e 's/^/-isystem /' -i tmp tr '\n' ' ' < tmp > $out ''; in runCommand "cling-${unwrapped.version}" { nativeBuildInputs = [ makeWrapper ]; inherit unwrapped flags compilerIncludeFlags; inherit (unwrapped) meta; } '' makeWrapper $unwrapped/bin/cling $out/bin/cling \ --add-flags "$(cat "$compilerIncludeFlags")" \ --add-flags "$flags" ''