[tip:perf/core] tools/perf/build: Split out feature check: 'libperl'

[tip-bot for Ingo Molnar]

Commit-ID:  7181a6714efc5039ffb50db7462d5cefe15b5630
Gitweb:     http://git.kernel.org/tip/7181a6714efc5039ffb50db7462d5cefe15b5630
Author:     Ingo Molnar <mingo@xxxxxxxxxx>
AuthorDate: Mon, 30 Sep 2013 15:15:36 +0200
Committer:  Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Wed, 9 Oct 2013 08:48:43 +0200

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

Cc: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: David Ahern <dsahern@xxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Link: http://lkml.kernel.org/n/tip-ggucqbwFwpxyuxde6dm7itHq@xxxxxxxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
 tools/perf/config/Makefile                      |  3 ++-
 tools/perf/config/feature-checks/Makefile       | 13 +++++++++++++
 tools/perf/config/feature-checks/test-libperl.c |  9 +++++++++
 3 files changed, 24 insertions(+), 1 deletion(-)

diff --git a/tools/perf/config/Makefile b/tools/perf/config/Makefile
index 3d3d435..8124dd5 100644
--- a/tools/perf/config/Makefile
+++ b/tools/perf/config/Makefile
@@ -118,6 +118,7 @@ FEATURE_TESTS =				\
 	libslang			\
 	gtk2				\
 	gtk2-infobar			\
+	libperl				\
 	libnuma
 
 $(foreach test,$(FEATURE_TESTS),$(call feature_check,$(test),$(test)))
@@ -321,7 +322,7 @@ else
   PERL_EMBED_CCOPTS = `perl -MExtUtils::Embed -e ccopts 2>/dev/null`
   FLAGS_PERL_EMBED=$(PERL_EMBED_CCOPTS) $(PERL_EMBED_LDOPTS)
 
-  ifneq ($(call try-cc,$(SOURCE_PERL_EMBED),$(FLAGS_PERL_EMBED),perl),y)
+  ifneq ($(feature-libperl), 1)
     CFLAGS += -DNO_LIBPERL
     NO_LIBPERL := 1
   else
diff --git a/tools/perf/config/feature-checks/Makefile b/tools/perf/config/feature-checks/Makefile
index 017918f..3033c25 100644
--- a/tools/perf/config/feature-checks/Makefile
+++ b/tools/perf/config/feature-checks/Makefile
@@ -16,6 +16,7 @@ FILES=					\
 	test-libslang			\
 	test-gtk2			\
 	test-gtk2-infobar		\
+	test-libperl			\
 	test-libnuma
 
 CC := $(CC) -MD
@@ -77,6 +78,18 @@ test-gtk2:
 test-gtk2-infobar:
 	$(BUILD) $(shell pkg-config --libs --cflags gtk+-2.0 2>/dev/null)
 
+grep-libs  = $(filter -l%,$(1))
+strip-libs = $(filter-out -l%,$(1))
+
+PERL_EMBED_LDOPTS = $(shell perl -MExtUtils::Embed -e ldopts 2>/dev/null)
+PERL_EMBED_LDFLAGS = $(call strip-libs,$(PERL_EMBED_LDOPTS))
+PERL_EMBED_LIBADD = $(call grep-libs,$(PERL_EMBED_LDOPTS))
+PERL_EMBED_CCOPTS = `perl -MExtUtils::Embed -e ccopts 2>/dev/null`
+FLAGS_PERL_EMBED=$(PERL_EMBED_CCOPTS) $(PERL_EMBED_LDOPTS)
+
+test-libperl:
+	$(BUILD) $(FLAGS_PERL_EMBED)
+
 -include *.d */*.d
 
 ###############################
diff --git a/tools/perf/config/feature-checks/test-libperl.c b/tools/perf/config/feature-checks/test-libperl.c
new file mode 100644
index 0000000..8871f6a
--- /dev/null
+++ b/tools/perf/config/feature-checks/test-libperl.c
@@ -0,0 +1,9 @@
+#include <EXTERN.h>
+#include <perl.h>
+
+int main(void)
+{
+	perl_alloc();
+
+	return 0;
+}
--
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