tools/perf/build: Split out feature check: 'libpython'

Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/n/tip-9wfutfb8ufFHrddrwlejqrai@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>

tools/perf/config/Makefile

@@ -119,6 +119,7 @@ FEATURE_TESTS =				\
 	gtk2				\
 	gtk2-infobar			\
 	libperl				\
+	libpython			\
 	libnuma
 
 $(foreach test,$(FEATURE_TESTS),$(call feature_check,$(test),$(test)))
@@ -367,7 +368,7 @@ else
       PYTHON_EMBED_CCOPTS := $(shell $(PYTHON_CONFIG_SQ) --cflags 2>/dev/null)
       FLAGS_PYTHON_EMBED := $(PYTHON_EMBED_CCOPTS) $(PYTHON_EMBED_LDOPTS)
 
-      ifneq ($(call try-cc,$(SOURCE_PYTHON_EMBED),$(FLAGS_PYTHON_EMBED),python),y)
+      ifneq ($(feature-libpython), 1)
         $(call disable-python,Python.h (for Python 2.x))
       else
 

tools/perf/config/feature-checks/Makefile

@@ -17,6 +17,7 @@ FILES=					\
 	test-gtk2			\
 	test-gtk2-infobar		\
 	test-libperl			\
+	test-libpython			\
 	test-libnuma
 
 CC := $(CC) -MD
@@ -90,6 +91,23 @@ FLAGS_PERL_EMBED=$(PERL_EMBED_CCOPTS) $(PERL_EMBED_LDOPTS)
 test-libperl:
 	$(BUILD) $(FLAGS_PERL_EMBED)
 
+override PYTHON := python
+override PYTHON_CONFIG := python-config
+
+escape-for-shell-sq =  $(subst ','\'',$(1))
+shell-sq = '$(escape-for-shell-sq)'
+
+PYTHON_CONFIG_SQ = $(call shell-sq,$(PYTHON_CONFIG))
+
+PYTHON_EMBED_LDOPTS = $(shell $(PYTHON_CONFIG_SQ) --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 = $(shell $(PYTHON_CONFIG_SQ) --cflags 2>/dev/null)
+FLAGS_PYTHON_EMBED = $(PYTHON_EMBED_CCOPTS) $(PYTHON_EMBED_LDOPTS)
+
+test-libpython:
+	$(BUILD) $(FLAGS_PYTHON_EMBED)
+
 -include *.d */*.d
 
 ###############################

tools/perf/config/feature-checks/test-libpython.c

@@ -0,0 +1,7 @@
+#include <Python.h>
+#
+int main(void)
+{
+	Py_Initialize();
+	return 0;
+}