README update and some cleanups. (#120)

Signed-off-by: Tomoya Fujita <Tomoya.Fujita@sony.com>

rcl_logging_noop/CMakeLists.txt

@@ -20,11 +20,7 @@ if(NOT WIN32)
   add_compile_options(-Wall -Wextra -Wpedantic)
 endif()
 
-set(${PROJECT_NAME}_sources
-  src/rcl_logging_noop/rcl_logging_noop.cpp
-)
-
-add_library(${PROJECT_NAME} ${${PROJECT_NAME}_sources})
+add_library(${PROJECT_NAME} src/rcl_logging_noop.cpp)
 
 target_link_libraries(${PROJECT_NAME} PRIVATE
   rcutils::rcutils)

rcl_logging_noop/README.md

@@ -0,0 +1,18 @@
+# rcl_logging_noop
+
+Package supporting an implementation of no-op logging functionality.
+
+[rcl_logging_noop](src/rcl_logging_noop.cpp) logging interface implementation can:
+ - initialize
+ - log a message
+ - set the logger level
+ - shutdown
+
+## Build
+
+Currently there is no way to select the logging interface implementation without building [rcl](https://github.com/ros2/rcl) with target logging interface implementation.
+
+```bash
+export RCL_LOGGING_IMPLEMENTATION=rcl_logging_noop
+colcon build --symlink-install --cmake-clean-cache --packages-select rcl_logging_noop rcl
+```

rcl_logging_spdlog/README.md

@@ -2,16 +2,12 @@
 
 Package supporting an implementation of logging functionality using `spdlog`.
 
-[rcl_logging_spdlog](include/rcl_logging_spdlog/logging_interface.h) logging interface implementation can:
+[rcl_logging_spdlog](src/rcl_logging_spdlog.cpp) logging interface implementation can:
  - initialize
  - log a message
  - set the logger level
  - shutdown
 
-Some useful internal abstractions and utilities:
-  - Macros for controlling symbol visibility on the library
-    - [rcl_logging_spdlog/visibility_control.h](include/rcl_logging_spdlog/visibility_control.h)
-
 ## Quality Declaration
 
 This package claims to be in the **Quality Level 1** category, see the [Quality Declaration](./QUALITY_DECLARATION.md) for more details.