[PATCH 2/6] perf, tools: Fix lib/traceevent build dir with OUTPUT variable set

[Robert Richter <robert.richter@amd.com>]

With the OUTPUT variable set the libtraceevent.a file is wrongly built
in the source directory:

 + make -d OUTPUT=/.../.build/perf-user/ DESTDIR=/.../.install/perf-user/
 ...
     Considering target file `../lib/traceevent//libtraceevent.a'.
      File `../lib/traceevent//libtraceevent.a' does not exist.
      Finished prerequisites of target file `../lib/traceevent//libtraceevent.a'.
     Must remake target `../lib/traceevent//libtraceevent.a'.
 Invoking recipe from Makefile:837 to update target `../lib/traceevent//libtraceevent.a'.
 Putting child 0x703850 (../lib/traceevent//libtraceevent.a) PID 8365 on the chain.
 Live child 0x703850 (../lib/traceevent//libtraceevent.a) PID 8365
     SUBDIR ../lib/traceevent/

 $ git clean -nxd
 Would remove tools/lib/traceevent/.event-parse.d
 Would remove tools/lib/traceevent/.parse-filter.d
 Would remove tools/lib/traceevent/.parse-utils.d
 Would remove tools/lib/traceevent/.trace-seq.d
 Would remove tools/lib/traceevent/event-parse.o
 Would remove tools/lib/traceevent/libtraceevent.a
 Would remove tools/lib/traceevent/parse-filter.o
 Would remove tools/lib/traceevent/parse-utils.o
 Would remove tools/lib/traceevent/trace-seq.o

This patch fixes this.

Note: Though this should already work with O=$outputdir we better use
the OUTPUT variable directly.

Signed-off-by: Robert Richter <robert.richter@amd.com>
---
 tools/perf/Makefile |    8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/tools/perf/Makefile b/tools/perf/Makefile
index 35655c3..2d4bf6e 100644
--- a/tools/perf/Makefile
+++ b/tools/perf/Makefile
@@ -186,10 +186,10 @@ SCRIPTS = $(patsubst %.sh,%,$(SCRIPT_SH))
 
 TRACE_EVENT_DIR = ../lib/traceevent/
 
-ifeq ("$(origin O)", "command line")
-	TE_PATH=$(OUTPUT)/
+ifneq ($(OUTPUT),)
+	TE_PATH=$(OUTPUT)
 else
-	TE_PATH=$(TRACE_EVENT_DIR)/
+	TE_PATH=$(TRACE_EVENT_DIR)
 endif
 
 LIBTRACEEVENT = $(TE_PATH)libtraceevent.a
@@ -842,7 +842,7 @@ $(LIB_FILE): $(LIB_OBJS)
 
 # libtraceevent.a
 $(LIBTRACEEVENT):
-	$(QUIET_SUBDIR0)$(TRACE_EVENT_DIR) $(QUIET_SUBDIR1) $(COMMAND_O) libtraceevent.a
+	$(QUIET_SUBDIR0)$(TRACE_EVENT_DIR) $(QUIET_SUBDIR1) O=$(OUTPUT) libtraceevent.a
 
 help:
 	@echo 'Perf make targets:'
-- 
1.7.8.4