Does not work with ESP32-C3, IDF 5.4

[simon4web]

-- Check for working CXX compiler: /usr/bin/c++ - broken
CMake Error at /opt/esp/tools/cmake/3.30.2/share/cmake-3.30/Modules/CMakeTestCXXCompiler.cmake:73 (message):
The C++ compiler

"/usr/bin/c++"

is not able to compile a simple test program.

It fails with the following output:

Change Dir: '/workspaces/myProject/build/esp-idf/marcel-cd__etlcpp/etl/CMakeFiles/CMakeScratch/TryCompile-xL6qnL'

Run Build Command(s): /usr/bin/ninja -v cmTC_e41d7
[1/2] /usr/bin/c++    -o CMakeFiles/cmTC_e41d7.dir/testCXXCompiler.cxx.obj -c /workspaces/myProject/build/esp-idf/marcel-cd__etlcpp/etl/CMakeFiles/CMakeScratch/TryCompile-xL6qnL/testCXXCompiler.cxx
[2/2] : && /usr/bin/c++  -nostartfiles -march=rv32imc_zicsr_zifencei --specs=nosys.specs CMakeFiles/cmTC_e41d7.dir/testCXXCompiler.cxx.obj -o cmTC_e41d7   && :
FAILED: cmTC_e41d7 
: && /usr/bin/c++  -nostartfiles -march=rv32imc_zicsr_zifencei --specs=nosys.specs CMakeFiles/cmTC_e41d7.dir/testCXXCompiler.cxx.obj -o cmTC_e41d7   && :
c++: fatal error: cannot read spec file 'nosys.specs': No such file or directory
compilation terminated.
ninja: build stopped: subcommand failed.

[pablobacho]

Thanks for the report. Unfortunately I haven't worked on this project in a while. Please check some of the forks that may be more up to date. If you'd like to contribute, we can merge a fix.