[PATCH 11/19] perf tools: Fix parallel build including 'clean' target

From: Arnaldo Carvalho de Melo
Date: Fri Feb 05 2016 - 11:32:51 EST


From: Jiri Olsa <jolsa@xxxxxxxxxx>

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 <acme@xxxxxxxxxx>
Signed-off-by: Jiri Olsa <jolsa@xxxxxxxxxx>
Acked-by: Wang Nan <wangnan0@xxxxxxxxxx>
Link: http://lkml.kernel.org/n/tip-kb0qs29zbz7hxn32mc5zbsoz@xxxxxxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
tools/perf/Makefile | 14 ++++++++++++++
1 file changed, 14 insertions(+)

diff --git a/tools/perf/Makefile b/tools/perf/Makefile
index 4b68f465195c..67837c6cdbd8 100644
--- 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:
#
--
2.5.0