Order objects based on LOCAL_SRC_FILES and LOCAL_GENERATED_SOURCES
We have been reordering objects to the linker based on how they were
generated. In soong, they're ordered based on the order listed in the
src_files.
Keep track of which source files created which object files so that we
can create the ordered list. Optionally change the order, based on
BINARY_OBJECTS_ORDER. That way we can compare make and soong builds.
Since we're keeping track of the used source files, warn when an entry
in LOCAL_SRC_FILES is not used. (whether it is an unused file like a
header, or a typo)
LOCAL_GENERATED_SOURCES is not verified, since it is valid to add
headers and other files in that list (to set up dependencies).
Change-Id: I1dfbbb3aa570c11c1db3b7133e46ed0b8c3b8989
diff --git a/core/definitions.mk b/core/definitions.mk
index 78b607b..a0b2976 100644
--- a/core/definitions.mk
+++ b/core/definitions.mk
@@ -905,6 +905,42 @@
endif
###########################################################
+## Track source files compiled to objects
+###########################################################
+# $(1): list of sources
+# $(2): list of matching objects
+define track-src-file-obj
+$(eval $(call _track-src-file-obj,$(1)))
+endef
+define _track-src-file-obj
+i := w
+$(foreach s,$(1),
+my_tracked_src_files += $(s)
+my_src_file_obj_$(s) := $$(word $$(words $$(i)),$$(2))
+i += w)
+endef
+
+# $(1): list of sources
+# $(2): list of matching generated sources
+define track-src-file-gen
+$(eval $(call _track-src-file-gen,$(2)))
+endef
+define _track-src-file-gen
+i := w
+$(foreach s,$(1),
+my_tracked_gen_files += $(s)
+my_src_file_gen_$(s) := $$(word $$(words $$(i)),$$(1))
+i += w)
+endef
+
+# $(1): list of generated sources
+# $(2): list of matching objects
+define track-gen-file-obj
+$(call track-src-file-obj,$(foreach f,$(1),\
+ $(or $(my_src_file_gen_$(f)),$(f))),$(2))
+endef
+
+###########################################################
## Commands for running lex
###########################################################