104 lines
3.5 KiB
Nix
104 lines
3.5 KiB
Nix
{ lib, stdenv
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, python3
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, libffi
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, git
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, cmake
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, zlib
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, fetchgit
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, makeWrapper
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, runCommand
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, runCommandNoCC
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, llvmPackages_5
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, glibc
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}:
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let
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unwrapped = stdenv.mkDerivation rec {
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pname = "cling-unwrapped";
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version = "0.7";
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src = fetchgit {
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url = "http://root.cern/git/clang.git";
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# This commit has the tag cling-0.7 so we use it, even though cpt.py
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# tries to use refs/tags/cling-patches-rrelease_50
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rev = "354b25b5d915ff3b1946479ad07f3f2768ea1621";
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branchName = "cling-patches";
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sha256 = "0q8q2nnvjx3v59ng0q3qqqhzmzf4pmfqqiy3rz1f3drx5w3lgyjg";
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};
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clingSrc = fetchgit {
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url = "http://root.cern/git/cling.git";
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rev = "70163975eee5a76b45a1ca4016bfafebc9b57e07";
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sha256 = "1mv2fhk857kp5rq714bq49iv7gy9fgdwibydj5wy1kq2m3sf3ysi";
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};
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preConfigure = ''
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echo "add_llvm_external_project(cling)" >> tools/CMakeLists.txt
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cp -r $clingSrc ./tools/cling
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chmod -R a+w ./tools/cling
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'';
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nativeBuildInputs = [ python3 git cmake ];
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buildInputs = [ libffi llvmPackages_5.llvm zlib ];
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strictDeps = true;
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cmakeFlags = [
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"-DLLVM_TARGETS_TO_BUILD=host;NVPTX"
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"-DLLVM_ENABLE_RTTI=ON"
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# Setting -DCLING_INCLUDE_TESTS=ON causes the cling/tools targets to be built;
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# see cling/tools/CMakeLists.txt
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"-DCLING_INCLUDE_TESTS=ON"
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];
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meta = with lib; {
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description = "The Interactive C++ Interpreter";
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homepage = "https://root.cern/cling/";
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license = with licenses; [ lgpl21 ncsa ];
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maintainers = with maintainers; [ thomasjm ];
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platforms = platforms.unix;
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};
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};
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# The flags passed to the wrapped cling should
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# a) prevent it from searching for system include files and libs, and
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# b) provide it with the include files and libs it needs (C and C++ standard library)
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# These are also exposed as cling.flags/cling.compilerIncludeFlags because it's handy to be
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# able to pass them to tools that wrap Cling, particularly Jupyter kernels such as xeus-cling
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# and the built-in jupyter-cling-kernel. Both of these use Cling as a library by linking against
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# libclingJupyter.so, so the makeWrapper approach to wrapping the binary doesn't work.
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# Thus, if you're packaging a Jupyter kernel, you either need to pass these flags as extra
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# args to xcpp (for xeus-cling) or put them in the environment variable CLING_OPTS
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# (for jupyter-cling-kernel)
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flags = [
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"-nostdinc"
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"-nostdinc++"
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"-isystem" "${lib.getDev stdenv.cc.libc}/include"
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"-I" "${unwrapped}/include"
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"-I" "${unwrapped}/lib/clang/5.0.2/include"
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];
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# Autodetect the include paths for the compiler used to build Cling, in the same way Cling does at
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# https://github.com/root-project/cling/blob/v0.7/lib/Interpreter/CIFactory.cpp#L107:L111
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# Note: it would be nice to just put the compiler in Cling's PATH and let it do this by itself, but
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# unfortunately passing -nostdinc/-nostdinc++ disables Cling's autodetection logic.
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compilerIncludeFlags = runCommandNoCC "compiler-include-flags.txt" {} ''
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export LC_ALL=C
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${stdenv.cc}/bin/c++ -xc++ -E -v /dev/null 2>&1 | sed -n -e '/^.include/,''${' -e '/^ \/.*++/p' -e '}' > tmp
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sed -e 's/^/-isystem /' -i tmp
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tr '\n' ' ' < tmp > $out
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'';
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in
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runCommand "cling-${unwrapped.version}" {
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buildInputs = [ makeWrapper ];
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inherit unwrapped flags compilerIncludeFlags;
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inherit (unwrapped) meta;
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} ''
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makeWrapper $unwrapped/bin/cling $out/bin/cling \
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--add-flags "$(cat "$compilerIncludeFlags")" \
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--add-flags "$flags"
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''
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