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perf tools: Fix build breakage if prefix= is specified

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Invoking Makefile.perf with prefix= breaks the build since Makefile.perf
hands that variable down to Makefile.build where it overrides

    prefix       := $(subst ./,,$(OUTPUT)$(dir)/)

leading to errors like this:

    No rule to make target '/usrabspath.o', needed by '/usrlibperf-in.o'

Signed-off-by: Lukas Wunner <lukas@wunner.de>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Fixes: c819e2cf2e
Link: http://lkml.kernel.org/r/5582c48a.84a22b0a.a918.5285SMTPIN_ADDED_MISSING@mx.google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Lukas Wunner 2015-06-18 13:00:32 +02:00 committed by Arnaldo Carvalho de Melo
parent 15c1247953
commit 75e84ab906
1 changed files with 4 additions and 4 deletions
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8
tools/build/Makefile.build
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@ -94,12 +94,12 @@ obj-y := $(patsubst %/, %/$(obj)-in.o, $(obj-y))
subdir-obj-y := $(filter %/$(obj)-in.o, $(obj-y))
# '$(OUTPUT)/dir' prefix to all objects
prefix := $(subst ./,,$(OUTPUT)$(dir)/)
obj-y := $(addprefix $(prefix),$(obj-y))
subdir-obj-y := $(addprefix $(prefix),$(subdir-obj-y))
objprefix := $(subst ./,,$(OUTPUT)$(dir)/)
obj-y := $(addprefix $(objprefix),$(obj-y))
subdir-obj-y := $(addprefix $(objprefix),$(subdir-obj-y))
# Final '$(obj)-in.o' object
in-target := $(prefix)$(obj)-in.o
in-target := $(objprefix)$(obj)-in.o
PHONY += $(subdir-y)