Trouble building master on debian strech/clang-4.0

[mschille]

Hi all,

I’m trying to build ROOT’s master branch on debian stretch with clang-4.0. The compiler is installed correctly, since I can build pretty demanding c++14 projects without issues. I call cmake with the following flags:

mkdir -p /usr/local/src/science/root600/builddir;
cd /usr/local/src/science/root600/builddir
cmake -G Ninja .. -Wno-dev -DCMAKE_INSTALL_PREFIX=/opt/root-6.00 \
    -DCMAKE_C_COMPILER=clang-4.0 \
    -DCMAKE_CXX_COMPILER=clang++-4.0 \
    -DCMAKE_F_COMPILER=gfortran \
    -DCMAKE_C_FLAGS="-Qunused-arguments -O2 -g -ffast-math -march=native -fno-omit-frame-pointer" \
    -DCMAKE_CXX_FLAGS="-Qunused-arguments -O2 -g -ffast-math -march=native -fno-omit-frame-pointer" \
    -DCMAKE_F_FLAGS="-O2 -g -ffast-math -march=native -fno-omit-frame-pointer" \
    -Dall=ON -Dtesting=OFF -Dcxx14=ON -Dsoversion=ON -Droofit=ON -Dminuit2=ON \
    -Dunuran=ON -Dbuiltin-freetype=OFF -Dbuiltin-pcre=OFF -Dbuiltin-zlib=OFF \
    -Dtable=ON -Dgsl-shared=ON -Dqt=ON -Dqtgsi=ON -Dafs=ON -Dshadowpw=ON \
    -Dbuiltin-afterimage=OFF -Dbuiltin-freetype=OFF -Druby=OFF -Dr=ON \
    -Dbuiltin-pcre=OFF -Dbuiltin-zlib=OFF -Dbuiltin-lzma=OFF -Dbuiltin_lz4=ON \
    -Dbuiltin-ftgl=OFF -Dbuiltin-glew=OFF -Ddavix=OFF -Dgsl_shared=ON \
    -Dbuiltin_ftgl=OFF -Dbuiltin_glew=OFF -Dbuiltin_vdt=ON -Dbuiltin_vc=ON \
    -Dbuiltin_xrootd=ON

I get the following error:

[...]
-- Go bindings enabled.
-- Found OCaml: /usr/bin/ocamlfind
-- OCaml bindings enabled.
-- LLVM host triple: x86_64-unknown-linux-gnu
-- LLVM default target triple: x86_64-unknown-linux-gnu
-- Building with -fPIC
-- Constructing LLVMBuild project information
-- Targeting X86
-- Found Z3: /usr/lib/x86_64-linux-gnu/libz3.so (Required is at least version "4.5")
-- Clang version: 5.0.0
CMake Error at interpreter/llvm/src/tools/clang/cmake/modules/AddClang.cmake:93 (if):
  if given arguments:

    "clangBasic" "IN_LIST" "LLVM_DISTRIBUTION_COMPONENTS" "OR" "NOT" "LLVM_DISTRIBUTION_COMPONENTS"

  Unknown arguments specified
Call Stack (most recent call first):
  interpreter/llvm/src/tools/clang/lib/Basic/CMakeLists.txt:65 (add_clang_library)


-- Configuring incomplete, errors occurred!
See also "/usr/local/src/science/root600/builddir/CMakeFiles/CMakeOutput.log".
See also "/usr/local/src/science/root600/builddir/CMakeFiles/CMakeError.log".

I have attached a log file of the CMake run and the two files it mentions at the end. Any pointers would be very much appreciated.

Thanks a lot in advance!
Cheers,

Manuel

CMakeError.log.txt (17.5 KB)
cmakelog.txt (10.5 KB)
CMakeOutput.log.txt (91.2 KB)

[amadio]

This looks like a bug in the build system. Could you please try again on a fresh build directory without setting your own compiler flags? It could be a problem with flag propagation between ROOT and llvm.

[mschille]

Thanks for the hint! I gave it a try (rm -fr builddir/*; cd builddir; …/doconfig.sh, the script I pasted above, but with the custom compiler flags removed), but it does not change anything, unfortunately.

[eguiraud]

Hi,
I’d start super simple and add possible sources of problems little by little. For example, you could checkout a commit that should certainly be working (cd /path/to/root/source; git checkout v6-10-00) and simply run cd path/to/build; cmake path/to/root. If this works without problems it should be easy to figure out what is the cause of your error by trying to checkout master (possibly after fetching the latest version) and/or adding flags.

edit: maybe obvious: ROOT’s build directory must be outside of the source directory

[mschille]

That was a good hint indeed, thanks! It seems that there’s something that’s gone wrong in my set of custom patches on top of ROOT (although I usually manage to leave the build files untouched - but I seem to have goofed there). I have a clue what to look for now, thanks!

Manuel