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>
diff --git a/tools/perf/Makefile b/tools/perf/Makefile
index 5aa3d04..9147044 100644
--- a/tools/perf/Makefile
+++ b/tools/perf/Makefile
@@ -34,7 +34,7 @@
# 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