b2 does not compile with clang 11

[diehlpk]

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Environment and version details

• Operating System+version: **Linux daint106 4.12.14-197.99-default Versioned Clang automatic configuration #1 SMP Thu Jul 15 13:52:56 UTC 2021 (a15b9f6) x86_64 x86_64 x86_64 GNU/Linux
  **
• Compiler+version: Clang 11*
• Shell: Bash,

Brief problem description

./b2 does not compile with clang 11

Steps to reproduce the issue

Install boost with clang 11

Actual behavior summary

> clang++ -x c++ -std=c++11 -O3 -s -DNDEBUG builtins.cpp class.cpp command.cpp compile.cpp constants.cpp cwd.cpp debug.cpp debugger.cpp execcmd.cpp execnt.cpp execunix.cpp filesys.cpp filent.cpp fileunix.cpp frames.cpp function.cpp glob.cpp hash.cpp hcache.cpp hdrmacro.cpp headers.cpp jam_strings.cpp jam.cpp jamgram.cpp lists.cpp make.cpp make1.cpp md5.cpp mem.cpp modules.cpp native.cpp object.cpp option.cpp output.cpp parse.cpp pathnt.cpp pathsys.cpp pathunix.cpp regexp.cpp rules.cpp scan.cpp search.cpp startup.cpp subst.cpp sysinfo.cpp timestamp.cpp variable.cpp w32_getreg.cpp modules/order.cpp modules/path.cpp modules/property-set.cpp modules/regex.cpp modules/sequence.cpp modules/set.cpp -o b2
ld.lld: error: undefined symbol: __cray_sset_detect
>>> referenced by order.cpp
>>>               /tmp/order-677dee.o:(order(frame*, int))
clang-11: error: linker command failed with exit code 1 (use -v to see invocation)

Expected behavior summary

I would like to compile b2 to install boost

[grafikrobot]

Strange since clang11 is tested continously (ex. https://dev.azure.com/bfgroup/3a4e7a7e-c1b4-4e2f-9199-f52918ea06c6/_apis/build/builds/301/logs/326) and it's fine on Ubuntu. My suspicion would be there's some extra options to use for building on your specific platform. Or that there's something broken about your tools install/setup. Can you give more details on your system. Which variant of Linux? (perhaps share contents of /etc/issue) Can you verify you can compile a simple hello world C++ program directly with a command as what b2 is using to build?

[diehlpk]

I could compile boost 1.75 and 1.70 using the same compiler. I am on a Cray system using the Cray cc and CC combined with clang 11. In addition, I could compile hdf5, silo, hwloc, jemalloc, and cmake using the same compiler.

clang++ --version

Cray clang version 11.0.0  (1563bb12fb3eabb03515d4cc4aeaedd757aea56a)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /opt/cray/pe/cce/11.0.0/cce-clang/x86_64/share/../bin

CC --version

clang++ --version
Cray clang version 11.0.0  (1563bb12fb3eabb03515d4cc4aeaedd757aea56a)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /opt/cray/pe/cce/11.0.0/cce-clang/x86_64/bin

uname -a

Linux daint106 4.12.14-197.99-default #1 SMP Thu Jul 15 13:52:56 UTC 2021 (a15b9f6) x86_64 x86_64 x86_64 GNU/Linux

[diehlpk]

@grafikrobot I found the issue why it does not compile and it is because clang++ is used and not CC as it should be on CRAY.

I have no idea how to tell boost to use CC instead of clang++ to compile b2 on a Cray machine.

[grafikrobot]

The Cray CC compiler is not one directly supported. It tries to use clang++ by default instead. First you can use whatever compiler you want by building b2 manually and using the --cxx=CC and --cxxflags=... options to the ./src/engine/build.sh script. Second it should be possible to fix using clang++ on Cray. Just need to figure out what additional CLI options are needed to resolve the link error you're seeing.

[grafikrobot]

Going to assume this is no longer a problem. If otherwise, feel free to reopen.

[markstock]

@diehlpk , or anyone else who is trying to build boost libraries with Cray compiler wrappers, the following seems to work.

First, edit bootstrap.sh about line 229 (in 1_79_0) with the extra chunk at the end:

CXX= CXXFLAGS= "$my_dir/tools/build/src/engine/build.sh" ${TOOLSET} "--cxx=CC"

Now you can run something like:

./bootstrap.sh --prefix=$MYLIB/boost-amd521 --with-toolset=clang --with-libraries=all

Then before the b2 call, edit tools/build/src/tools/clang-linux.jam about line 52 and replace clang++ with CC. Now you can run:

./b2 --prefix=$MYLIB/boost-amd521 --build-dir=build-amd521 toolset=clang install

[markstock]

There is also a build script in the following repository, though I have not tried it: https://github.com/Cray/pe-scripts