Add make lcov-html to generate code coverage report

In addition, update build rules to compile object files in the same
directory as the source code file if CONFIG_CODE_COVERAGE=y is set to
make lcov find the source code files.

Signed-hostap: Jouni Malinen <j@w1.fi>

hostapd/Makefile

@@ -6,8 +6,8 @@ ifndef CFLAGS
 CFLAGS = -MMD -O2 -Wall -g
 endif
 
-CFLAGS += -I../src
-CFLAGS += -I../src/utils
+CFLAGS += -I$(abspath ../src)
+CFLAGS += -I$(abspath ../src/utils)
 
 # Uncomment following line and set the path to your kernel tree include
 # directory if your C library does not include all header files.
@@ -873,9 +873,15 @@ Q=
 E=true
 endif
 
+ifdef CONFIG_CODE_COVERAGE
+%.o: %.c
+	@$(E) "  CC " $<
+	$(Q)cd $(dir $@); $(CC) -c -o $(notdir $@) $(CFLAGS) $(notdir $<)
+else
 %.o: %.c
 	$(Q)$(CC) -c -o $@ $(CFLAGS) $<
 	@$(E) "  CC " $<
+endif
 
 verify_config:
 	@if [ ! -r .config ]; then \
@@ -944,9 +950,15 @@ hlr_auc_gw: $(HOBJS)
 	$(Q)$(CC) $(LDFLAGS) -o hlr_auc_gw $(HOBJS) $(LIBS_h)
 	@$(E) "  LD " $@
 
+lcov-html:
+	lcov -c -d .. > lcov.info
+	genhtml lcov.info --output-directory lcov-html
+
 clean:
 	$(MAKE) -C ../src clean
 	rm -f core *~ *.o hostapd hostapd_cli nt_password_hash hlr_auc_gw
 	rm -f *.d *.gcno *.gcda *.gcov
+	rm -f lcov.info
+	rm -rf lcov-html
 
 -include $(OBJS:%.o=%.d)

wpa_supplicant/Makefile

@@ -10,8 +10,8 @@ export LIBDIR ?= /usr/local/lib/
 export BINDIR ?= /usr/local/sbin/
 PKG_CONFIG ?= pkg-config
 
-CFLAGS += -I../src
-CFLAGS += -I../src/utils
+CFLAGS += -I$(abspath ../src)
+CFLAGS += -I$(abspath ../src/utils)
 
 -include .config
 
@@ -1622,9 +1622,15 @@ eap_eke.so: ../src/eap_peer/eap_eke.c ../src/eap_common/eap_eke_common.c
 	$(CC) $(LDFLAGS) -o $@ $(CFLAGS) -shared -rdynamic -fPIC $< \
 		-D$(*F:eap_%=eap_peer_%)_register=eap_peer_method_dynamic_init
 
+ifdef CONFIG_CODE_COVERAGE
+%.o: %.c
+	@$(E) "  CC " $<
+	$(Q)cd $(dir $@); $(CC) -c -o $(notdir $@) $(CFLAGS) $(notdir $<)
+else
 %.o: %.c
 	$(Q)$(CC) -c -o $@ $(CFLAGS) $<
 	@$(E) "  CC " $<
+endif
 
 %.service: %.service.in
 	sed -e 's|\@BINDIR\@|$(BINDIR)|g' $< >$@
@@ -1676,6 +1682,10 @@ FIPSLD=$(FIPSDIR)/bin/fipsld
 fips:
 	$(MAKE) CC=$(FIPSLD) FIPSLD_CC="$(CC)"
 
+lcov-html: wpa_supplicant.gcda
+	lcov -c -d .. > lcov.info
+	genhtml lcov.info --output-directory lcov-html
+
 clean:
 	$(MAKE) -C ../src clean
 	$(MAKE) -C dbus clean
@@ -1683,5 +1693,7 @@ clean:
 	rm -f eap_*.so $(ALL) $(WINALL) eapol_test preauth_test
 	rm -f wpa_priv
 	rm -f nfc_pw_token
+	rm -f lcov.info
+	rm -rf lcov-html
 
 -include $(OBJS:%.o=%.d)