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perf tools: Makefile: Clean up `python/perf.so' rule

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There is no need for a subshell or an explicit `export';
as per the POSIX Shell Command Language specification:

  http://pubs.opengroup.org/onlinepubs/009695399/utilities/xcu_chap02.html#tag_02_09_01
  http://pubs.opengroup.org/onlinepubs/009695399/utilities/xcu_chap02.html#tag_02_10_02

It is only necessary to include the environment variable
assignment just before the command to be run.

Also, it is better to use single-quotes, because GNU make
might expand `$(BASIC_CFLAGS)' into something that the shell
could interpret within double-quotes.

Acked-by: Raghavendra D Prabhu <rprabhu@wnohang.net>
Link: http://lkml.kernel.org/n/tip-58n38o02ocuzrm9qh096hsf5@git.kernel.org
Signed-off-by: Michael Witten <mfwitten@gmail.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Michael Witten 2011-04-09 01:12:56 +00:00 committed by Arnaldo Carvalho de Melo
parent aeafcbaf4f
commit 3643b133f2
1 changed files with 4 additions and 6 deletions
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10
tools/perf/Makefile
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@ -165,12 +165,10 @@ grep-libs = $(filter -l%,$(1))
strip-libs = $(filter-out -l%,$(1))
$(OUTPUT)python/perf.so: $(PYRF_OBJS)
$(QUIET_GEN)( \
export CFLAGS="$(BASIC_CFLAGS)"; \
python util/setup.py --quiet build_ext --build-lib='$(OUTPUT)python' \
--build-temp='$(OUTPUT)python/temp' \
)
$(QUIET_GEN)CFLAGS='$(BASIC_CFLAGS)' python util/setup.py \
--quiet build_ext \
--build-lib='$(OUTPUT)python' \
--build-temp='$(OUTPUT)python/temp'
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