Teach 'make tags' about MOCK_IMPL.

Patch from nherring; closes ticket 16869

Makefile.am

@@ -36,6 +36,9 @@ EXTRA_DIST+= \
 	README						\
 	ReleaseNotes
 
+## This tells etags how to find mockable function definitions.
+AM_ETAGSFLAGS=--regex='{c}/MOCK_IMPL([^,]+,\W*\([a-zA-Z0-9_]+\)\W*,/\1/s'
+
 if COVERAGE_ENABLED
 TEST_CFLAGS=-fno-inline -fprofile-arcs -ftest-coverage
 if DISABLE_ASSERTS_IN_UNIT_TESTS

changes/16869

@@ -0,0 +1,4 @@
+  o Minor features (development tools, etags):
+    - Teach the "make tags" Makefile target how to correctly find
+      "MOCK_IMPL" function definitions. Patch from nherring; closes
+      ticket 16869.