CMake Warning: Manually-specified variables were not used by the project: CMAKE_EXPORT_NO_PACKAGE_REGISTRY CMAKE_INSTALL_DATAROOTDIR CMAKE_INSTALL_LIBEXECDIR CMAKE_INSTALL_OLDINCLUDEDIR CMAKE_INSTALL_SBINDIR clang: error: unable to execute command: Terminated clang: error: clang frontend command failed due to signal (use -v to see invocation) clang version 9.0.0-2 (tags/RELEASE_900/final) Target: x86_64-pc-linux-gnu Thread model: posix InstalledDir: /usr/bin clang: note: diagnostic msg: PLEASE submit a bug report to https://bugs.llvm.org/ and include the crash backtrace, preprocessed source, and associated run script. Terminated make[2]: *** [source_subfolder/CMakeFiles/mailio.dir/build.make:128: source_subfolder/CMakeFiles/mailio.dir/src/dialog.cpp.o] Error 143 make[2]: *** Waiting for unfinished jobs.... clang: error: unable to execute command: Terminated clang: error: clang frontend command failed due to signal (use -v to see invocation) clang version 9.0.0-2 (tags/RELEASE_900/final) Target: x86_64-pc-linux-gnu Thread model: posix InstalledDir: /usr/bin clang: note: diagnostic msg: PLEASE submit a bug report to https://bugs.llvm.org/ and include the crash backtrace, preprocessed source, and associated run script. Terminated make[2]: *** [source_subfolder/CMakeFiles/mailio.dir/build.make:141: source_subfolder/CMakeFiles/mailio.dir/src/imap.cpp.o] Error 143 clang: error: unable to execute command: Terminated clang: error: clang frontend command failed due to signal (use -v to see invocation) clang version 9.0.0-2 (tags/RELEASE_900/final) Target: x86_64-pc-linux-gnu Thread model: posix InstalledDir: /usr/bin clang: note: diagnostic msg: PLEASE submit a bug report to https://bugs.llvm.org/ and include the crash backtrace, preprocessed source, and associated run script. Terminated make[2]: *** [source_subfolder/CMakeFiles/mailio.dir/build.make:167: source_subfolder/CMakeFiles/mailio.dir/src/message.cpp.o] Error 143 make[1]: *** [CMakeFiles/Makefile2:94: source_subfolder/CMakeFiles/mailio.dir/all] Error 2 make: *** [Makefile:130: all] Error 2 ERROR: Exiting with code: 5