[PATCH 5/9] perf build: Add feature-dump target

From: Wang Nan
Date: Wed Jan 13 2016 - 07:19:39 EST


From: Jiri Olsa <jolsa@xxxxxxxxxx>

To provide FEATURE-DUMP into $(FEATURE_DUMP_COPY)
if defined, with no further action.

Get feature dump of the current build:
$ make feature-dump
BUILD: Doing 'make -j4' parallel build

Auto-detecting system features:
... dwarf: [ on ]

FEATURE-DUMP file available in FEATURE-DUMP

Get feature dump static build into /tmp/fd file:
$ make feature-dump FEATURE_DUMP_COPY=/tmp/fd LDFLAGS=-static
BUILD: Doing 'make -j4' parallel build

Auto-detecting system features:
... dwarf: [ OFF ]

SNIP

FEATURE-DUMP file copied into /tmp/fd

Suggested-by: Wang Nan <wangnan0@xxxxxxxxxx>
Link: http://lkml.kernel.org/n/tip-xzqhfxw3euqmls3cve0ruuol@xxxxxxxxxxxxxx
Signed-off-by: Jiri Olsa <jolsa@xxxxxxxxxx>
Signed-off-by: Wang Nan <wangnan0@xxxxxxxxxx>
---
tools/perf/Makefile.perf | 11 +++++++++++
1 file changed, 11 insertions(+)

diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf
index 0a22407..f758a72 100644
--- a/tools/perf/Makefile.perf
+++ b/tools/perf/Makefile.perf
@@ -611,6 +611,17 @@ clean: $(LIBTRACEEVENT)-clean $(LIBAPI)-clean $(LIBBPF)-clean $(LIBSUBCMD)-clean
$(python-clean)

#
+# To provide FEATURE-DUMP into $(FEATURE_DUMP_COPY)
+# file if defined, with no further action.
+feature-dump:
+ifdef FEATURE_DUMP_COPY
+ @cp $(OUTPUT)FEATURE-DUMP $(FEATURE_DUMP_COPY)
+ @echo "FEATURE-DUMP file copied into $(FEATURE_DUMP_COPY)"
+else
+ @echo "FEATURE-DUMP file available in $(OUTPUT)FEATURE-DUMP"
+endif
+
+#
# Trick: if ../../.git does not exist - we are building out of tree for example,
# then force version regeneration:
#
--
1.8.3.4