Support coverage testing with GCC/gcov

diff --git a/Makefile b/Makefile
index b040a96e50a30c5413f109d4e49d9c538625918f..c32881b00b8d125cbfd7690c9cb183160f9a8a54 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -1640,3 +1640,27 @@ check-docs::
 check-builtins::
        ./check-builtins.sh
 
+### Test suite coverage testing
+#
+.PHONY: coverage coverage-clean coverage-build coverage-report
+
+coverage:
+       $(MAKE) coverage-build
+       $(MAKE) coverage-report
+
+coverage-clean:
+       rm -f *.gcda *.gcno
+
+COVERAGE_CFLAGS = $(CFLAGS) -O0 -ftest-coverage -fprofile-arcs
+COVERAGE_LDFLAGS = $(CFLAGS)  -O0 -lgcov
+
+coverage-build: coverage-clean
+       $(MAKE) CFLAGS="$(COVERAGE_CFLAGS)" LDFLAGS="$(COVERAGE_LDFLAGS)" all
+       $(MAKE) CFLAGS="$(COVERAGE_CFLAGS)" LDFLAGS="$(COVERAGE_LDFLAGS)" \
+               -j1 test
+
+coverage-report:
+       gcov -b *.c
+       grep '^function.*called 0 ' *.c.gcov \
+               | sed -e 's/\([^:]*\)\.gcov: *function \([^ ]*\) called.*/\1: \2/' \
+               | tee coverage-untested-functions