Add API documentation and Doxyfile for tracetools

Signed-off-by: Christophe Bedard <bedard.christophe@gmail.com>

Change title

Signed-off-by: Christophe Bedard <bedard.christophe@gmail.com>

tracetools/Doxyfile

@@ -0,0 +1,32 @@
+# All settings not listed here will use the Doxygen default values.
+# To use, see: https://gitlab.com/micro-ROS/ros_tracing/ros2_tracing-api
+
+PROJECT_NAME           = "tracetools"
+PROJECT_NUMBER         = $(PROJECT_NUMBER)
+PROJECT_BRIEF          = "Tracing tools and instrumentation for ROS 2"
+
+INPUT                  = ./include
+
+RECURSIVE              = YES
+OUTPUT_DIRECTORY       = doc_output
+
+EXTRACT_ALL            = YES
+SORT_MEMBER_DOCS       = NO
+
+GENERATE_LATEX         = NO
+
+ENABLE_PREPROCESSING   = YES
+MACRO_EXPANSION        = YES
+EXPAND_ONLY_PREDEF     = NO
+PREDEFINED             = \
+    "TRACETOOLS_PUBLIC="
+
+EXCLUDE_SYMBOLS        = \
+    "DECLARE_TRACEPOINT" \
+    "_demangle_symbol" \
+    "_get_symbol_funcptr"
+
+# Tag files that do not exist will produce a warning and cross-project linking will not work.
+TAGFILES += "../../../data/cppreference-doxygen-web.tag.xml=http://en.cppreference.com/w/"
+# Uncomment to generate tag files for cross-project linking.
+GENERATE_TAGFILE = "../../../data/tracetools.tag"