1 files changed, 9 insertions, 2 deletions

diff --git a/tools/root.make b/tools/root.make
index 00586379c6..8a923983f9 100644
--- a/tools/root.make
+++ b/tools/root.make
@@ -51,8 +51,8 @@ endif
 
 all: $(DEPFILE) build
 
-# Subdir makefiles. their primary purpose is to populate SRC & OTHER_SRC
-# but they also define special dependencies and compile rules
+# Subdir makefiles. their primary purpose is to populate SRC, OTHER_SRC &
+# ASMDEFS_SRC but they also define special dependencies and compile rules
 include $(TOOLSDIR)/tools.make
 include $(FIRMDIR)/firmware.make
 include $(ROOTDIR)/apps/bitmaps/bitmaps.make
@@ -96,6 +96,7 @@ $(DEPFILE) dep:
         @echo foo > /dev/null # there must be a "real" command in the rule
         $(call mkdepfile,$(DEPFILE),$(SRC))
         $(call mkdepfile,$(DEPFILE),$(OTHER_SRC))
+        $(call mkdepfile,$(DEPFILE),$(ASMDEFS_SRC))
         @mv $(DEPFILE)_ $(DEPFILE)
         $(call bmpdepfile,$(DEPFILE),$(BMP) $(PBMP))
 
@@ -317,6 +318,12 @@ $(BUILDDIR)/%.o: $(ROOTDIR)/%.S
         $(SILENT)mkdir -p $(dir $@)
         $(call PRINTS,CC $(subst $(ROOTDIR)/,,$<))$(CC) $(CFLAGS) -c $< -o $@
 
+# generated definitions for use in .S files
+$(BUILDDIR)/%_asmdefs.h: $(ROOTDIR)/%_asmdefs.c
+        $(call PRINTS,ASMDEFS $(@F))
+        $(SILENT)mkdir -p $(dir $@)
+        $(call asmdefs2file,$<,$@)
+
 # when source and object are both in BUILDDIR (generated code):
 %.o: %.c
         $(SILENT)mkdir -p $(dir $@)