[CMake] Add global clean target `clean_all`. Fixes #718.

This target invokes the `clean` target but is also intended for use by
other cleaning targets. The `clean_runtime` target is now declared as a
dependency of `clean-all` so that the runtime is cleaned as well.

1 files changed, 4 insertions, 2 deletions

diff --git a/runtime/CMakeLists.txt b/runtime/CMakeLists.txt
index c90cbda0..2a056d9f 100644
--- a/runtime/CMakeLists.txt
+++ b/runtime/CMakeLists.txt
@@ -115,13 +115,15 @@ ExternalProject_Add_Step(BuildKLEERuntimes RuntimeBuild
 )
 
 # Target for cleaning the bitcode build system
-# FIXME: Invoke `make clean` does not invoke this target. It's also weird
-# that `ExternalProject` provides no way to do a clean.
+# NOTE: Invoking `make clean` does not invoke this target.
+# Instead the user needs to invoke the `clean_all` target.
+# It's also weird that `ExternalProject` provides no way to do a clean.
 add_custom_target(clean_runtime
   COMMAND ${ENV_BINARY} MAKEFLAGS="" ${MAKE_BINARY} -f Makefile.cmake.bitcode clean
   WORKING_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}"
   ${ADD_CUSTOM_COMMAND_USES_TERMINAL_ARG}
 )
+add_dependencies(clean_all clean_runtime)
 
 ###############################################################################
 # Runtime install