Generate header dependency files for consistency

Original commit message:

Fix segfault on ARMv7

* Do you understand what's happening?
* Do not use . for all-c-files-under, which will cause wrong paths

.gitignore

@@ -1,4 +1,5 @@
 *.o
+*.d
 .*
 minieap
 ifaddrs.c

append.mk

@@ -7,13 +7,24 @@ $(LOCAL_MODULE)_PRIV_C_FLAGS := \
 
 $(LOCAL_MODULE)_LDFLAGS := $(LOCAL_LDFLAGS)
 $(LOCAL_MODULE)_PRIV_OBJS := $(addprefix $(LOCAL_PATH),$(LOCAL_SRC_FILES:.c=.o))
+$(LOCAL_MODULE)_PRIV_DEPS := $(addprefix $(LOCAL_PATH),$(LOCAL_SRC_FILES:.c=.d))
 
 # Use := here!
+# And $($(xxx)_suffix), not $(xxx)_suffix
 .PHONY: $(LOCAL_MODULE)
-$(LOCAL_MODULE) : CFLAGS := $($(LOCAL_MODULE)_PRIV_C_FLAGS)
+$($(LOCAL_MODULE)_PRIV_OBJS) : CFLAGS := $($(LOCAL_MODULE)_PRIV_C_FLAGS)
 $(LOCAL_MODULE) : $($(LOCAL_MODULE)_PRIV_OBJS)
 
+# sed: change everything before ":" to "${@:.d=.o} $@"
+$($(LOCAL_MODULE)_PRIV_DEPS) : CFLAGS := $($(LOCAL_MODULE)_PRIV_C_FLAGS)
+$($(LOCAL_MODULE)_PRIV_DEPS) : ${@:.d=.c}
+	@$(CC) -MM ${@:.d=.c} $(CFLAGS) > $@
+	@sed -i 's,^.*:,${@:.d=.o} $@ : ,g' $@
+
+# %.o %.d : *.c
+-include $($(LOCAL_MODULE)_PRIV_DEPS)
+
 .PHONY: $(LOCAL_MODULE)_clean
 $(LOCAL_MODULE)_clean:
 # Use patsubst to get correct filenames!
-	rm -f $($(patsubst %_clean,%,$@)_PRIV_OBJS)
+	rm -f $($(patsubst %_clean,%,$@)_PRIV_OBJS) $($(patsubst %_clean,%,$@)_PRIV_DEPS)

if_impl/minieap.mk

@@ -2,7 +2,7 @@
 
 LOCAL_PATH := $(call my-dir)
 
-LOCAL_SRC_FILES := $(call all-c-files-under,.)
+LOCAL_SRC_FILES := $(call all-c-files-under,)
 LOCAL_C_INCLUDES :=
 LOCAL_CFLAGS :=
 LOCAL_LDFLAGS :=

minieap.mk

@@ -2,7 +2,7 @@
 
 LOCAL_PATH := $(call my-dir)
 
-LOCAL_SRC_FILES := $(call all-c-files-under,.)
+LOCAL_SRC_FILES := $(call all-c-files-under,)
 LOCAL_C_INCLUDES :=
 LOCAL_CFLAGS :=
 LOCAL_LDFLAGS :=

packet_plugin/minieap.mk

@@ -2,7 +2,7 @@
 
 LOCAL_PATH := $(call my-dir)
 
-LOCAL_SRC_FILES := $(call all-c-files-under,.)
+LOCAL_SRC_FILES := $(call all-c-files-under,)
 LOCAL_C_INCLUDES :=
 LOCAL_CFLAGS :=
 LOCAL_LDFLAGS :=

packet_plugin/rjv3/minieap.mk

@@ -3,7 +3,7 @@
 LOCAL_PATH := $(call my-dir)
 
 LOCAL_SRC_FILES := \
-    $(call all-c-files-under,.) \
+    $(call all-c-files-under,) \
     $(call all-c-files-under,rjv3_hashes)
 LOCAL_C_INCLUDES := rjv3_hashes
 LOCAL_CFLAGS :=

util/minieap.mk

@@ -2,7 +2,7 @@
 
 LOCAL_PATH := $(call my-dir)
 
-LOCAL_SRC_FILES := $(filter-out ifaddrs.c, $(call all-c-files-under,.))
+LOCAL_SRC_FILES := $(filter-out %ifaddrs.c, $(call all-c-files-under,))
 LOCAL_C_INCLUDES :=
 LOCAL_CFLAGS :=
 LOCAL_LDFLAGS :=