perf tools: Fix parallel build including 'clean' target

Do not parallelize 'clean' with other targets, figure out if it is
present and do it first, then the other targets.

Noticed with:

  tools/perf> make -j24 clean all

   LD       arch/libperf-in.o
   LD       plugin_xen-in.o
 arch//libperf-in.o: file not recognized: File truncated
 make[3]: *** [arch/libperf-in.o] Error 1
 make[2]: *** [arch] Error 2
 make[2]: *** Waiting for unfinished jobs....
   AR       libapi.a

Reported-and-Tested-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: Jiri Olsa <[email protected]>
Acked-by: Wang Nan <[email protected]>
Link: http://lkml.kernel.org/n/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

diff --git a/tools/perf/Makefile b/tools/perf/Makefile
index 4b68f465195cb5fa371b28d16404435c0c7ae9d6..67837c6cdbd8eb55e4f1380c0916e22b440c9a59 100644 (file)
--- a/tools/perf/Makefile
+++ b/tools/perf/Makefile
@@ -68,6 +68,20 @@ all tags TAGS:
        $(print_msg)
        $(make)
 
+ifdef MAKECMDGOALS
+has_clean := 0
+ifneq ($(filter clean,$(MAKECMDGOALS)),)
+  has_clean := 1
+endif # clean
+
+ifeq ($(has_clean),1)
+  rest := $(filter-out clean,$(MAKECMDGOALS))
+  ifneq ($(rest),)
+$(rest): clean
+  endif # rest
+endif # has_clean
+endif # MAKECMDGOALS
+
 #
 # The clean target is not really parallel, don't print the jobs info:
 #