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Subject[PATCH 05/36] perf build: Disable make's built-in rules
Date
We don't use any built-in rules, so we can disable
make's checks for that and build faster.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Tested-by: Will Deacon <will.deacon@arm.com>
Cc: Alexis Berlemont <alexis.berlemont@gmail.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
---
tools/perf/Makefile.perf | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf
index aa6a50447c32..8087f97ee4e8 100644
--- a/tools/perf/Makefile.perf
+++ b/tools/perf/Makefile.perf
@@ -84,6 +84,10 @@ ifneq ($(OUTPUT),)
#$(info Determined 'OUTPUT' to be $(OUTPUT))
endif

+# Do not use make's built-in rules
+# (this increases performance and avoids hard-to-debug behaviour);
+MAKEFLAGS += -r
+
$(OUTPUT)PERF-VERSION-FILE: ../../.git/HEAD
@$(SHELL_PATH) util/PERF-VERSION-GEN $(OUTPUT)
@touch $(OUTPUT)PERF-VERSION-FILE
--
1.9.3


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