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{ stdenv
, python
, libffi
, git
, cmake
, zlib
, fetchgit
, makeWrapper
, runCommand
, runCommandNoCC
, llvmPackages_5
, glibc
}:
let
unwrapped = stdenv.mkDerivation rec {
pname = "cling-unwrapped";
version = "0.7";
src = fetchgit {
url = "http://root.cern/git/clang.git";
# This commit has the tag cling-0.7 so we use it, even though cpt.py
# tries to use refs/tags/cling-patches-rrelease_50
rev = "354b25b5d915ff3b1946479ad07f3f2768ea1621";
branchName = "cling-patches";
sha256 = "0q8q2nnvjx3v59ng0q3qqqhzmzf4pmfqqiy3rz1f3drx5w3lgyjg";
};
clingSrc = fetchgit {
url = "http://root.cern/git/cling.git";
rev = "70163975eee5a76b45a1ca4016bfafebc9b57e07";
sha256 = "1mv2fhk857kp5rq714bq49iv7gy9fgdwibydj5wy1kq2m3sf3ysi";
};
preConfigure = ''
echo "add_llvm_external_project(cling)" >> tools/CMakeLists.txt
cp -r $clingSrc ./tools/cling
chmod -R a+w ./tools/cling
'';
nativeBuildInputs = [ python git cmake ];
buildInputs = [ libffi llvmPackages_5.llvm zlib ];
cmakeFlags = [
"-DLLVM_TARGETS_TO_BUILD=host;NVPTX"
"-DLLVM_ENABLE_RTTI=ON"
# Setting -DCLING_INCLUDE_TESTS=ON causes the cling/tools targets to be built;
# see cling/tools/CMakeLists.txt
"-DCLING_INCLUDE_TESTS=ON"
];
meta = with stdenv.lib; {
description = "The Interactive C++ Interpreter";
homepage = "https://root.cern/cling/";
license = with licenses; [ lgpl21 ncsa ];
maintainers = with maintainers; [ thomasjm ];
platforms = platforms.unix;
};
};
# The flags passed to the wrapped cling should
# a) prevent it from searching for system include files and libs, and
# b) provide it with the include files and libs it needs (C and C++ standard library)
# These are also exposed as cling.flags/cling.compilerIncludeFlags because it's handy to be
# able to pass them to tools that wrap Cling, particularly Jupyter kernels such as xeus-cling
# and the built-in jupyter-cling-kernel. Both of these use Cling as a library by linking against
# libclingJupyter.so, so the makeWrapper approach to wrapping the binary doesn't work.
# Thus, if you're packaging a Jupyter kernel, you either need to pass these flags as extra
# args to xcpp (for xeus-cling) or put them in the environment variable CLING_OPTS
# (for jupyter-cling-kernel)
flags = [
"-nostdinc"
"-nostdinc++"
"-isystem" "${glibc.dev}/include"
"-I" "${unwrapped}/include"
"-I" "${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 = runCommandNoCC "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}" {
buildInputs = [ makeWrapper ];
inherit unwrapped flags compilerIncludeFlags;
inherit (unwrapped) meta;
} ''
makeWrapper $unwrapped/bin/cling $out/bin/cling \
--add-flags "$(cat "$compilerIncludeFlags")" \
--add-flags "$flags"
''
|
