From: Arnaldo Carvalho de Melo <[email protected]>

Instead of doing an unconditional mkdir, use a dummy Makefile variable
to check if the directory is there and if not, create it.

This is better than what we had and will help with other python bindings
that are in development, like one involved with python backtraces.

Cc: Adrian Hunter <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Namhyung Kim <[email protected]>
Link: https://lkml.kernel.org/n/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
---
 tools/perf/Makefile.perf | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf
index ff29c3372ec3..2921f829a0f4 100644
--- a/tools/perf/Makefile.perf
+++ b/tools/perf/Makefile.perf
@@ -524,12 +524,14 @@ $(arch_errno_name_array): $(arch_errno_tbl)
 
 all: shell_compatibility_test $(ALL_PROGRAMS) $(LANG_BINDINGS) 
$(OTHER_PROGRAMS)
 
+# Create python binding output directory if not already present
+_dummy := $(shell [ -d '$(OUTPUT)python' ] || mkdir -p '$(OUTPUT)python')
+
 $(OUTPUT)python/perf.so: $(PYTHON_EXT_SRCS) $(PYTHON_EXT_DEPS) 
$(LIBTRACEEVENT_DYNAMIC_LIST)
        $(QUIET_GEN)LDSHARED="$(CC) -pthread -shared" \
         CFLAGS='$(CFLAGS)' LDFLAGS='$(LDFLAGS) 
$(LIBTRACEEVENT_DYNAMIC_LIST_LDFLAGS)' \
          $(PYTHON_WORD) util/setup.py \
          --quiet build_ext; \
-       mkdir -p $(OUTPUT)python && \
        cp $(PYTHON_EXTBUILD_LIB)perf*.so $(OUTPUT)python/
 
 please_set_SHELL_PATH_to_a_more_modern_shell:
-- 
2.20.1

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