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tools/perf/build: Fix non-existent build directory handling 

Arnaldo reported that non-existent build directories were not
recognized  properly. The reason is readlink failure causing 'O'
to become empty.

Solve it by passing through the 'O' variable unmodified if
readlink fails.

Reported-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: http://lkml.kernel.org/r/20131009150023.GA10167@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Ingo Molnar 2013-10-09 17:00:23 +02:00 committed by Arnaldo Carvalho de Melo
parent 4e98771274
commit 3fb66335e1
1 changed files with 1 additions and 1 deletions
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2
tools/perf/Makefile
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@ -34,7 +34,7 @@ endif
# Only pass canonical directory names as the output directory:
#
ifneq ($(O),)
FULL_O := $(shell readlink -f $(O))
FULL_O := $(shell readlink -f $(O) || echo $(O))
endif
define print_msg