[PATCH] Use the environment variable PYTHON if defined

[Raghavendra D Prabhu <rprabhu@wnohang.net>]

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On systems with python{2,3} installed, perf build can break which can be fixed by
exporting PYTHON to the right value. Added support for PYTHON in the Makefile.
---
  tools/perf/Makefile |    8 ++++++--
  1 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/tools/perf/Makefile b/tools/perf/Makefile
index 7141c42..d998221 100644
--- a/tools/perf/Makefile
+++ b/tools/perf/Makefile
@@ -149,6 +149,9 @@ endif
  #
  # Define NO_PERL if you do not want Perl scripts or libraries at all.
  #
+# Define PYTHON to point to python binary if it is not
+# /usr/bin/python, it will be used/called as $PYTHON-config.
+#
  # Define INTERNAL_QSORT to use Git's implementation of qsort(), which
  # is a simplified version of the merge sort used in glibc. This is
  # recommended if Git triggers O(n^2) behavior in your platform's qsort().
@@ -629,10 +632,11 @@ endif
  ifdef NO_LIBPYTHON
  	BASIC_CFLAGS += -DNO_LIBPYTHON
  else
-       PYTHON_EMBED_LDOPTS = $(shell python-config --ldflags 2>/dev/null)
+       PYTHON ?= /usr/bin/python
+       PYTHON_EMBED_LDOPTS = $(shell $(PYTHON)-config --ldflags 2>/dev/null)
         PYTHON_EMBED_LDFLAGS = $(call strip-libs,$(PYTHON_EMBED_LDOPTS))
         PYTHON_EMBED_LIBADD = $(call grep-libs,$(PYTHON_EMBED_LDOPTS))
-	PYTHON_EMBED_CCOPTS = `python-config --cflags 2>/dev/null`
+	PYTHON_EMBED_CCOPTS = ` $(PYTHON)-config --cflags 2>/dev/null`
  	FLAGS_PYTHON_EMBED=$(PYTHON_EMBED_CCOPTS) $(PYTHON_EMBED_LDOPTS)
  	ifneq ($(call try-cc,$(SOURCE_PYTHON_EMBED),$(FLAGS_PYTHON_EMBED)),y)
  		BASIC_CFLAGS += -DNO_LIBPYTHON
-- 
1.7.4.1

--------------------------
Raghavendra Prabhu
GPG ID:D72BE977


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