See http://www.infradead.org/rpr.html

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

  $ make -C tools/perf build-test
  make[1]: Entering directory `/home/acme/git/linux/tools/perf'
                 make_pure_O: cd . && make -f Makefile  O=/tmp/tmp.mPx0Cmik3f 
DESTDIR=/tmp/tmp.U0SUmVbtJm
            make_clean_all_O: cd . && make -f Makefile  O=/tmp/tmp.Yl5UzhTU7T 
DESTDIR=/tmp/tmp.fop1E4jdER clean all
                make_debug_O: cd . && make -f Makefile  O=/tmp/tmp.pMn2ozBoXC 
DESTDIR=/tmp/tmp.azxhDp5sEp DEBUG=1
           make_no_libperl_O: cd . && make -f Makefile  O=/tmp/tmp.qJPiINMtA7 
DESTDIR=/tmp/tmp.KNMrLeGDxZ NO_LIBPERL=1
  <SNIP>

More needs to be done to make it more compact, i.e. elide the '-f Makefile',
remove that 'cd . &&', move the DESTDIR= and O= to the end, as they don't
convey that much information besides the fact that they are being set to some
random directory just for this build, move the meat, i.e. the meaningful
feature disabling bits to the start, etc.

Cc: Adrian Hunter <[email protected]>
Cc: David Ahern <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Wang Nan <[email protected]>
Link: http://lkml.kernel.org/n/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
---
 tools/perf/tests/make | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/tools/perf/tests/make b/tools/perf/tests/make
index 7f663f4611c6..cc72b67bde5e 100644
--- a/tools/perf/tests/make
+++ b/tools/perf/tests/make
@@ -261,6 +261,8 @@ run := $(shell shuf -e $(run))
 run_O := $(shell shuf -e $(run_O))
 endif
 
+max_width := $(shell echo $(run_O) | sed 's/ /\n/g' | wc -L)
+
 ifdef DEBUG
 d := $(info run   $(run))
 d := $(info run_O $(run_O))
@@ -274,7 +276,7 @@ $(run):
        $(call clean)
        @TMP_DEST=$$(mktemp -d); \
        cmd="cd $(PERF) && make -f $(MK) $(PARALLEL_OPT) $(O_OPT) 
DESTDIR=$$TMP_DEST $($@)"; \
-       echo "- $@: $$cmd" && echo $$cmd > $@ && \
+       printf "%*.*s: %s\n" $(max_width) $(max_width) "$@" "$$cmd" && echo 
$$cmd > $@ && \
        ( eval $$cmd ) >> $@ 2>&1; \
        echo "  test: $(call test,$@)" >> $@ 2>&1; \
        $(call test,$@) && \
@@ -285,7 +287,7 @@ $(run_O):
        @TMP_O=$$(mktemp -d); \
        TMP_DEST=$$(mktemp -d); \
        cmd="cd $(PERF) && make -f $(MK) $(PARALLEL_OPT) O=$$TMP_O 
DESTDIR=$$TMP_DEST $($(patsubst %_O,%,$@))"; \
-       echo "- $@: $$cmd" && echo $$cmd > $@ && \
+       printf "%*.*s: %s\n" $(max_width) $(max_width) "$@" "$$cmd" && echo 
$$cmd > $@ && \
        ( eval $$cmd ) >> $@ 2>&1 && \
        echo "  test: $(call test_O,$@)" >> $@ 2>&1; \
        $(call test_O,$@) && \
-- 
2.5.0

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