7 files changed, 8 insertions, 25 deletions
diff --git a/Makefile.main b/Makefile.main
index 5f8691a..d4249f0 100644
--- a/Makefile.main
+++ b/Makefile.main
@@ -29,7 +29,7 @@ CWARNS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
 # Host tools and options
 HOSTCC=gcc
 HOSTEND=$(shell uname -m | sed -e 's/^i.*86$$/LITTLE/' -e 's/^x86.*/LITTLE/' -e 's/^ppc.*/BIG/')
-HOSTCFLAGS=-O1 $(CWARNS) -DHAVE_$(HOSTEND)_ENDIAN
+HOSTCFLAGS=-O1 $(CWARNS) -DHAVE_$(HOSTEND)_ENDIAN -MMD
 VALGRIND=valgrind -q --show-reachable=yes --error-exitcode=99
 
 # Target options
diff --git a/core/test/Makefile.check b/core/test/Makefile.check
index 7ffbfc4..15a662f 100644
--- a/core/test/Makefile.check
+++ b/core/test/Makefile.check
@@ -19,18 +19,9 @@ $(CORE_TEST) : core/test/stubs.o
 $(CORE_TEST) : % : %.c
 	$(HOSTCC) $(HOSTCFLAGS) -O0 -g -I include -I . -I libfdt -o $@ $< core/test/stubs.o
 
-$(CORE_TEST): % : %.d
-
 $(CORE_TEST:%=%-gcov): %-gcov : %.c %
 	$(HOSTCC) $(HOSTCFLAGS) -fprofile-arcs -ftest-coverage -O0 -g -I include -I . -I libfdt -lgcov -o $@ $< core/test/stubs.o
 
-$(CORE_TEST:%=%-gcov): % : $(%.d:-gcov=)
-
-core/test/stubs.o: core/test/stubs.d
-
-core/test/%.d: core/test/%.c
-	$(HOSTCC) $(HOSTCFLAGS) -I include -I . -I libfdt -M $< > $@
-
 -include $(wildcard core/test/*.d)
 
 clean: core-test-clean
diff --git a/hdata/test/Makefile.check b/hdata/test/Makefile.check
index 63fcb4a..39e7c1e 100644
--- a/hdata/test/Makefile.check
+++ b/hdata/test/Makefile.check
@@ -12,6 +12,8 @@ hdata/test/stubs.o: hdata/test/stubs.c
 hdata/test/hdata_to_dt: hdata/test/hdata_to_dt.c hdata/test/stubs.o
 	$(HOSTCC) $(HOSTCFLAGS) -DTEST -O0 -g -I hdata -I include -I . -I libfdt -o $@ $< hdata/test/stubs.o
 
+-include $(wildcard hdata/test/*.d)
+
 clean: hdata-test-clean
 
 hdata-test-clean:
diff --git a/hw/ipmi/test/Makefile.check b/hw/ipmi/test/Makefile.check
index 364a921..59c7a9b 100644
--- a/hw/ipmi/test/Makefile.check
+++ b/hw/ipmi/test/Makefile.check
@@ -14,16 +14,11 @@ $(IPMI_TEST:%=%-check) : %-check: %
 $(IPMI_TEST) : % : %.c
 	$(HOSTCC) $(HOSTCFLAGS) -O0 -g -I include -I . -o $@ $<
 
-$(IPMI_TEST): % : %.d
-
 $(IPMI_TEST:%=%-gcov): %-gcov : %.c %
 	$(HOSTCC) $(HOSTCFLAGS) -fprofile-arcs -ftest-coverage -O0 -g -I include -I . -I libfdt -lgcov -o $@ $<
 
 $(IPMI_TEST:%=%-gcov): % : $(%.d:-gcov=)
 
-hw/ipmi/test/%.d: hw/ipmi/test/%.c
-	$(HOSTCC) $(HOSTCFLAGS) -I include -I . -I libfdt -M $< > $@
-
 -include $(wildcard hw/ipmi/test/*.d)
 
 clean: ipmi-test-clean
diff --git a/libc/test/Makefile.check b/libc/test/Makefile.check
index dc9f1ff..57f6cf7 100644
--- a/libc/test/Makefile.check
+++ b/libc/test/Makefile.check
@@ -14,16 +14,9 @@ $(LIBC_TEST:%=%-check) : %-check: %
 $(LIBC_TEST) : % : %.c
 	$(HOSTCC) $(HOSTCFLAGS) -O0 -g -I include -I . -I libfdt -I libc/include -o $@ $<
 
-$(LIBC_TEST): % : %.d
-
 $(LIBC_TEST:%=%-gcov): %-gcov : %.c %
 	$(HOSTCC) $(HOSTCFLAGS) -fprofile-arcs -ftest-coverage -lgcov -O0 -g -I include -I . -I libfdt -I libc/include -o $@ $<
 
-$(LIBC_TEST:%=%-gcov): % : $(%.d:-gcov=)
-
-libc/test/%.d: libc/test/%.c
-	$(HOSTCC) $(HOSTCFLAGS) -I include -I . -I libfdt -I libc/include -M $< > $@
-
 -include $(wildcard libc/test/*.d)
 
 clean: libc-test-clean
diff --git a/libflash/test/Makefile.check b/libflash/test/Makefile.check
index 54a7890..d6aac3c 100644
--- a/libflash/test/Makefile.check
+++ b/libflash/test/Makefile.check
@@ -22,7 +22,7 @@ $(LIBFLASH_TEST) : % : %.c
 $(LIBFLASH_TEST:%=%-gcov): %-gcov : %.c %
 	$(HOSTCC) $(HOSTCFLAGS) -fprofile-arcs -ftest-coverage -lgcov -O0 -g -I include -I . -o $@ $< libflash/test/stubs.o
 
-$(LIBFLASH_TEST:%=%-gcov): % : $(%.d:-gcov=)
+-include $(wildcard libflash/test/*.d)
 
 clean: libflash-test-clean
 
diff --git a/test/hello_world/Makefile.check b/test/hello_world/Makefile.check
index 6e94da7..a2a430c 100644
--- a/test/hello_world/Makefile.check
+++ b/test/hello_world/Makefile.check
@@ -2,14 +2,16 @@ HELLO_WORLD_TEST := test/hello_world/hello_kernel/hello_kernel
 
 check: $(HELLO_WORLD_TEST:%=%-check)
 
-$(HELLO_WORLD_TEST:%=%-check) : %-check: %
+$(HELLO_WORLD_TEST:%=%-check) : %-check: % skiboot.lid
 	./test/hello_world/run_hello_world.sh
 
 test/hello_world/hello_kernel/hello_kernel.o: test/hello_world/hello_kernel/hello_kernel.S
-	$(call Q,CC, $(CC) -m64 -c -Itest/hello_world/hello_kernel/ -o $@ $^ ,$@)
+	$(call Q,CC, $(CC) -m64 -c -MMD -Itest/hello_world/hello_kernel/ -o $@ $^ ,$@)
 
 hello_kernel_LDFLAGS=-m64 -Wl,--build-id=none -T test/hello_world/hello_kernel/hello_kernel.ld -ffreestanding -nostdlib -Ttext=0x0 -lgcc
 
+-include $(wildcard test/hello_world/hello_kernel/*.d)
+
 test/hello_world/hello_kernel/hello_kernel: test/hello_world/hello_kernel/hello_kernel.o
 	$(call Q,LD, $(CC) $(hello_kernel_LDFLAGS) -o $@ $^ , $@)