Warn more clearly when there are duplicate copied headers
When more than one makefile tries to copy a header to the same
destination, the warning is not clear, and hard to track down and assign
blame:
build/core/copy_headers.mk:15: warning: ignoring old commands for target `out/target/product/bullhead/obj/include/qcom/display/copybit.h'
With this change, the same behavior is kept, but the warning message is
more descriptive, and contains the offending Android.mk files:
build/core/Makefile:54: Duplicate header copy: out/target/product/bullhead/obj/include/qcom/display/copybit.h
build/core/Makefile:54: Defined in: hardware/qcom/display/msm8994/libcopybit/Android.mk hardware/qcom/display/msm8994/libcopybit/Android.mk
In this case, a $(CLEAR_VARS) is missing, so the same Android.mk file is
copying the same headers twice.
Bug: 27302058
Change-Id: Icf8f580ae71a78741db21c1d8f3213424459e637
(cherry picked from commit 6f60f020d781d9a93786616039323e9f25e02c0b)
diff --git a/core/Makefile b/core/Makefile
index 5ad6505..5423322 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -47,6 +47,20 @@
unique_product_copy_files_destinations :=
# -----------------------------------------------------------------
+# Define rules to copy headers defined in copy_headers.mk
+# If more than one makefile declared a header, print a warning,
+# then copy the last one defined. This matches the previous make
+# behavior.
+$(foreach dest,$(ALL_COPIED_HEADERS), \
+ $(eval _srcs := $(ALL_COPIED_HEADERS.$(dest).SRC)) \
+ $(eval _src := $(word $(words $(_srcs)),$(_srcs))) \
+ $(if $(call streq,$(_src),$(_srcs)),, \
+ $(warning Duplicate header copy: $(dest)) \
+ $(warning Defined in: $(ALL_COPIED_HEADERS.$(dest).MAKEFILE))) \
+ $(eval $(call copy-one-header,$(_src),$(dest))))
+all_copied_headers: $(ALL_COPIED_HEADERS)
+
+# -----------------------------------------------------------------
# docs/index.html
ifeq (,$(TARGET_BUILD_APPS))
gen := $(OUT_DOCS)/index.html
@@ -469,7 +483,6 @@
# the ramdisk
INTERNAL_RAMDISK_FILES := $(filter $(TARGET_ROOT_OUT)/%, \
$(ALL_PREBUILT) \
- $(ALL_COPIED_HEADERS) \
$(ALL_GENERATED_SOURCES) \
$(ALL_DEFAULT_INSTALLED_MODULES))
@@ -1034,7 +1047,6 @@
INTERNAL_SYSTEMIMAGE_FILES := $(filter $(TARGET_OUT)/%, \
$(ALL_PREBUILT) \
- $(ALL_COPIED_HEADERS) \
$(ALL_GENERATED_SOURCES) \
$(ALL_DEFAULT_INSTALLED_MODULES) \
$(PDK_FUSION_SYSIMG_FILES) \
@@ -1951,7 +1963,6 @@
ifeq ($(strip $(ATREE_FILES)),)
ATREE_FILES := \
$(ALL_PREBUILT) \
- $(ALL_COPIED_HEADERS) \
$(ALL_DEFAULT_INSTALLED_MODULES) \
$(INSTALLED_RAMDISK_TARGET) \
$(ALL_DOCS) \
diff --git a/core/copy_headers.mk b/core/copy_headers.mk
index e16560f..7d5a5d9 100644
--- a/core/copy_headers.mk
+++ b/core/copy_headers.mk
@@ -18,8 +18,10 @@
$(if $(LOCAL_COPY_HEADERS_TO),\
$($(my_prefix)OUT_HEADERS)/$(LOCAL_COPY_HEADERS_TO)/$(notdir $(header)),\
$($(my_prefix)OUT_HEADERS)/$(notdir $(header)))) \
- $(eval $(call copy-one-header,$(_chFrom),$(_chTo))) \
- $(eval all_copied_headers: $(_chTo)) \
+ $(eval ALL_COPIED_HEADERS.$(_chTo).MAKEFILE += $(LOCAL_MODULE_MAKEFILE)) \
+ $(eval ALL_COPIED_HEADERS.$(_chTo).SRC += $(_chFrom)) \
+ $(if $(filter $(_chTo),$(ALL_COPIED_HEADERS)),, \
+ $(eval ALL_COPIED_HEADERS += $(_chTo))) \
)
_chFrom :=
_chTo :=
