Generate tags for Vi, for Emacs and with Global

.gitignore

@@ -26,3 +26,11 @@ massif-*
 
 # CMake generates *.dir/ folders for in-tree builds (used by MSVC projects), ignore all of those:
 *.dir/
+
+# Editor navigation files:
+/GPATH
+/GRTAGS
+/GSYMS
+/GTAGS
+/TAGS
+/tags

.globalrc

+default:\
+    :langmap=c\:.c.h.function:\
+

Makefile

@@ -132,3 +132,12 @@ apidoc:
 apidoc_clean:
 	rm -rf apidoc
 endif
+
+## Editor navigation files
+C_SOURCE_FILES = $(wildcard include/*/*.h library/*.[hc] programs/*/*.[hc] tests/suites/*.function)
+tags: $(C_SOURCE_FILES)
+	ctags -o $@ $(C_SOURCE_FILES)
+TAGS: $(C_SOURCE_FILES)
+	etags -o $@ $(C_SOURCE_FILES)
+GPATH GRTAGS GSYMS GTAGS: $(C_SOURCE_FILES)
+	ls $(C_SOURCE_FILES) | gtags -f - --gtagsconf .globalrc