Merge remote-tracking branch 'origin/pr/2494' into mbedtls-2.7

* origin/pr/2494:
  Ignore more generated files: seedfile, apidoc
  Improve .gitignore grouping and documentation
  Generate tags for Vi, for Emacs and with Global

.gitignore

@@ -1,8 +1,20 @@
+# Random seed file created by test scripts and sample programs
+seedfile
+
+# CMake build artifacts:
 CMakeCache.txt
 CMakeFiles
 CTestTestfile.cmake
 cmake_install.cmake
 Testing
+# CMake generates *.dir/ folders for in-tree builds (used by MSVC projects), ignore all of those:
+*.dir/
+# MSVC files generated by CMake:
+/*.sln
+/*.vcxproj
+/*.filters
+
+# Test coverage build artifacts:
 Coverage
 *.gcno
 *.gcda
@@ -10,16 +22,22 @@ Coverage
 # generated by scripts/memory.sh
 massif-*
 
-# MSVC files generated by CMake:
-/*.sln
-/*.vcxproj
-/*.filters
-
 # MSVC build artifacts:
 *.exe
 *.pdb
 *.ilk
 *.lib
 
-# CMake generates *.dir/ folders for in-tree builds (used by MSVC projects), ignore all of those:
-*.dir/
+# Python build artifacts:
+*.pyc
+
+# Generated documentation:
+/apidoc
+
+# Editor navigation files:
+/GPATH
+/GRTAGS
+/GSYMS
+/GTAGS
+/TAGS
+/tags

.globalrc

@@ -0,0 +1,3 @@
+default:\
+    :langmap=c\:.c.h.function:\
+

Makefile

@@ -108,3 +108,12 @@ 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