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Subject[RFC 1/2] Kbuild: Make composite object searching more generic
Date
Reduce repeated logic around expanding composite objects in preparation
for later commit to support nested composite objects.

Signed-off-by: Elliot Berman <eberman@codeaurora.org>
---
scripts/Makefile.lib | 12 ++++++++----
1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index 213677a5..93e4f10 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -56,15 +56,19 @@ else
obj-y := $(filter-out %/, $(obj-y))
endif

+# Expand $(foo-objs) $(foo-y) by calling $(call suffix-search,foo.o,-objs -y)
+suffix-search = $(foreach s,$(2),$($(1:.o=$s)))
# If $(foo-objs), $(foo-y), $(foo-m), or $(foo-) exists, foo.o is a composite object
-multi-used-y := $(sort $(foreach m,$(obj-y), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-))), $(m))))
-multi-used-m := $(sort $(foreach m,$(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-m)) $($(m:.o=-))), $(m))))
+multi-search = $(sort $(foreach m,$(1), $(if $(strip $(call suffix-search,$(m),$(2) -)), $(m))))
+multi-used-y := $(call multi-search,$(obj-y),-objs -y)
+multi-used-m := $(call multi-search,$(obj-m),-objs -y -m)
multi-used := $(multi-used-y) $(multi-used-m)

# Replace multi-part objects by their individual parts,
# including built-in.a from subdirectories
-real-obj-y := $(foreach m, $(obj-y), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-))),$($(m:.o=-objs)) $($(m:.o=-y)),$(m)))
-real-obj-m := $(foreach m, $(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-m)) $($(m:.o=-))),$($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-m)),$(m)))
+real-search = $(foreach m,$(1), $(if $(strip $(call suffix-search,$(m),$(2) -)),$(call suffix-search,$(m),$(2)),$(m)))
+real-obj-y := $(call real-search, $(obj-y),-objs -y)
+real-obj-m := $(call real-search, $(obj-m),-objs -y -m)

always-y += $(always-m)

--
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project
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