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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 <[email protected]>
Acked-by: Jiri Olsa <[email protected]>
Cc: David Ahern <[email protected]>
Fixes: c819e2cf2e
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
This commit is contained in:
Lukas Wunner authored and Arnaldo Carvalho de Melo committed 2015-06-19 16:39:42 -03:00
1 parent 15c1247953
commit 75e84ab906
1 file changed
+4 -4
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tools/build/Makefile.build
+4 -4
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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)