CMake ninja generator error #16
Description
I found an issue while compiling the example by using CMake ninja generator. Complete log follows:
❯ CXX=g++-11 CC=gcc-11 cmake -S example -B cmake-build-debug -DCMAKE_BUILD_TYPE=Debug -GNinja
-- The CXX compiler identification is GNU 11.3.0
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/g++-11 - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- C++ target standard = 20
-- modules support = TRUE
--
-- C++ latest standard = 23
-- modules support = TRUE
-- Configuring done
-- Generating done
-- Build files have been written to: /home/gbellizio/CLionProjects/GH/modules/cmake-build-debug
❯ cmake --build cmake-build-debug
[1/4] Building CXX object CMakeFiles/main.dir/main.cc.o
FAILED: CMakeFiles/main.dir/main.cc.o
/usr/bin/g++-11 -I/home/gbellizio/CLionProjects/GH/modules/example/include -g -fmodules-ts -std=c++20 -MD -MT CMakeFiles/main.dir/main.cc.o -MF CMakeFiles/main.dir/main.cc.o.d -o CMakeFiles/main.dir/main.cc.o -c /home/gbellizio/CLionProjects/GH/modules/example/main.cc
In module imported at /home/gbellizio/CLionProjects/GH/modules/example/main.cc:1:1:
hello: error: failed to read compiled module: No such file or directory
hello: note: compiled module file is ‘gcm.cache/hello.gcm’
hello: note: imports must be built before being imported
hello: fatal error: returning to the gate for a mechanical issue
compilation terminated.
[2/4] Building CXX object CMakeFiles/hello.dir/hello.cc.o
FAILED: CMakeFiles/hello.dir/hello.cc.o
/usr/bin/g++-11 -I/home/gbellizio/CLionProjects/GH/modules/example/include -g -fmodules-ts -std=c++20 -MD -MT CMakeFiles/hello.dir/hello.cc.o -MF CMakeFiles/hello.dir/hello.cc.o.d -o CMakeFiles/hello.dir/hello.cc.o -c /home/gbellizio/CLionProjects/GH/modules/example/hello.cc
inputs may not also have inputs
ninja: build stopped: subcommand failed.
With Makefile generator all works fine.