tests/beman/execution26/exec-with-awaitable-senders.test.cpp:11:10: fatal error: 'print' file not found

[ClausKlein]

klein_cl@lx005535:~/Workspace/cpp/beman/execution26$ make
CC=/usr/lib/llvm-19/bin/clang++ cmake --fresh -G Ninja -S /home/klein_cl/Workspace/cpp/beman/execution26 -B  build/default   \
      -DCMAKE_CXX_COMPILER=/usr/lib/llvm-19/bin/clang++ # XXX -DCMAKE_CXX_FLAGS="-g "
-- The CXX compiler identification is Clang 19.1.4
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /usr/lib/llvm-19/bin/clang++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- TARGET_ALIAS="beman_execution26::beman_execution26" ; TARGET_LIBRARY="beman_execution26" ; TARGET_PREFIX="beman.execution26" ; PROJECT_SOURCE_DIR="/home/klein_cl/Workspace/cpp/beman/execution26"
-- Configuring done (0.4s)
-- Generating done (0.1s)
-- Build files have been written to: /home/klein_cl/Workspace/cpp/beman/execution26/build/default
cmake --build build/default
[62/211] Scanning /home/klein_cl/Workspace/cpp/beman/execution26/tests/beman/execution26/exec-with-awaitable-senders.test.cpp for CXX dependencies
FAILED: tests/beman/execution26/CMakeFiles/beman.execution26.exec-with-awaitable-senders.test.dir/exec-with-awaitable-senders.test.cpp.o.ddi 
"/usr/bin/clang-scan-deps-19" -format=p1689 -- /usr/lib/llvm-19/bin/clang++  -I/home/klein_cl/Workspace/cpp/beman/execution26/tests/beman/execution26/include -I/home/klein_cl/Workspace/cpp/beman/execution26/include -std=gnu++23 -x c++ /home/klein_cl/Workspace/cpp/beman/execution26/tests/beman/execution26/exec-with-awaitable-senders.test.cpp -c -o tests/beman/execution26/CMakeFiles/beman.execution26.exec-with-awaitable-senders.test.dir/exec-with-awaitable-senders.test.cpp.o -resource-dir "/usr/lib/llvm-19/lib/clang/19" -MT tests/beman/execution26/CMakeFiles/beman.execution26.exec-with-awaitable-senders.test.dir/exec-with-awaitable-senders.test.cpp.o.ddi -MD -MF tests/beman/execution26/CMakeFiles/beman.execution26.exec-with-awaitable-senders.test.dir/exec-with-awaitable-senders.test.cpp.o.ddi.d > tests/beman/execution26/CMakeFiles/beman.execution26.exec-with-awaitable-senders.test.dir/exec-with-awaitable-senders.test.cpp.o.ddi.tmp && mv tests/beman/execution26/CMakeFiles/beman.execution26.exec-with-awaitable-senders.test.dir/exec-with-awaitable-senders.test.cpp.o.ddi.tmp tests/beman/execution26/CMakeFiles/beman.execution26.exec-with-awaitable-senders.test.dir/exec-with-awaitable-senders.test.cpp.o.ddi
Error while scanning dependencies for /home/klein_cl/Workspace/cpp/beman/execution26/tests/beman/execution26/exec-with-awaitable-senders.test.cpp:
/home/klein_cl/Workspace/cpp/beman/execution26/tests/beman/execution26/exec-with-awaitable-senders.test.cpp:11:10: fatal error: 'print' file not found
[79/211] Building CXX object tests/beman/execution26/CMakeFiles/beman.execution26.stopcallback-inplace-general.test.dir/stopcallback-inplace-general.test.cpp.o
ninja: build stopped: subcommand failed.
make: *** [Makefile:82: build] Error 1
klein_cl@lx005535:~/Workspace/cpp/beman/execution26$ grep -rw print tests/
tests/beman/execution26/exec-with-awaitable-senders.test.cpp:#include <print>
klein_cl@lx005535:~/Workspace/cpp/beman/execution26$ 

[ClausKlein]

The main question is: why is CI green?

I do not find any CI run with the exec-with-awaitable-senders.test

[maikel]

Well, the above doesn’t use libc++-19 but whatever libstdc++ is available, right? The print header is part of c++23 and I think it worked for me with libc++-18.

that, said: I believe print is not even used there and I forgot to remove it when I changed the example into a proper test

[maikel]

The main question is: why is CI green?

I do not find any CI run with the exec-with-awaitable-senders.test

I think ci properly uses libc++

[ClausKlein]

Should we adapt the CMakePresets.json to use explicit the libc++ ?

[maikel]

Should we adapt the CMakePresets.json to use explicit the libc++ ?

Hm, I thought it would be already the case. For reference, I use the following CMakeUserPresets in development

{
  "version": 9,
  "cmakeMinimumRequired": {
    "major": 3,
    "minor": 30,
    "patch": 0
  },
  "configurePresets": [
    {
      "name": "cppcheck",
      "hidden": true,
      "cacheVariables": {
        "CMAKE_CXX_CPPCHECK": "cppcheck;--inline-suppr"
      }
    },
    {
      "name": "clang-tidy",
      "hidden": true,
      "cacheVariables": {
        "CMAKE_CXX_CLANG_TIDY": "clang-tidy-18;--header-filter=^${sourceDir}/"
      }
    },
    {
      "name": "clang",
      "hidden": false,
      "cacheVariables": {
        "CMAKE_CXX_COMPILER": "/usr/bin/clang++-18",
        "CMAKE_CXX_FLAGS": "-ftemplate-backtrace-limit=0 -stdlib=libc++"
      },
      "inherits": [
        "debug",
        "clang-tidy",
        "cppcheck"
      ]
    },
    {
      "name": "clang-asan",
      "hidden": false,
      "cacheVariables": {
        "CMAKE_CXX_COMPILER": "/usr/bin/clang++-18",
        "CMAKE_CXX_FLAGS": "-ftemplate-backtrace-limit=0 -stdlib=libc++ -fsanitize=address"
      },
      "inherits": [
        "debug"
      ]
    }
  ]
}```

[dietmarkuehl]

It would be good to consistently build with the same setup to avoid things slipping through. I found that recent features aren't necessarily supported by all compilers, yet. I try to stay away from those where possible.

[maikel]

Can we close this? (Or do we have actionable items)

[ClausKlein]

Ok, works