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Subject[PATCH 007/161] tools/perf/build: Split out feature check: 'volatile-register-var'
Date
From: Ingo Molnar <mingo@kernel.org>

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-5dOevlybbwvbk3zTbcxrrqet@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
tools/perf/config/Makefile | 3 ++-
tools/perf/config/feature-checks/Makefile | 4 ++++
tools/perf/config/feature-checks/test-volatile-register-var.c | 6 ++++++
3 files changed, 12 insertions(+), 1 deletion(-)
create mode 100644 tools/perf/config/feature-checks/test-volatile-register-var.c

diff --git a/tools/perf/config/Makefile b/tools/perf/config/Makefile
index 9f94912ccf63..a3de2f8bd61a 100644
--- a/tools/perf/config/Makefile
+++ b/tools/perf/config/Makefile
@@ -105,6 +105,7 @@ FEATURE_TESTS = \
hello \
stackprotector-all \
stackprotector \
+ volatile-register-var \
libnuma

$(foreach test,$(FEATURE_TESTS),$(call feature_check,$(test),$(test)))
@@ -117,7 +118,7 @@ ifeq ($(feature-stackprotector), 1)
CFLAGS += -Wstack-protector
endif

-ifeq ($(call try-cc,$(SOURCE_HELLO),$(CFLAGS) -Werror -Wvolatile-register-var,-Wvolatile-register-var),y)
+ifeq ($(feature-volatile-register-var), 1)
CFLAGS += -Wvolatile-register-var
endif

diff --git a/tools/perf/config/feature-checks/Makefile b/tools/perf/config/feature-checks/Makefile
index 46b7650983cb..5693299b4806 100644
--- a/tools/perf/config/feature-checks/Makefile
+++ b/tools/perf/config/feature-checks/Makefile
@@ -3,6 +3,7 @@ FILES= \
test-hello \
test-stackprotector-all \
test-stackprotector \
+ test-volatile-register-var \
test-libnuma

CC := $(CC) -MD
@@ -22,6 +23,9 @@ test-stackprotector-all:
test-stackprotector:
$(BUILD) -Werror -fstack-protector

+test-volatile-register-var:
+ $(BUILD) -Werror -Wvolatile-register-var
+
test-libnuma:
$(BUILD) -lnuma

diff --git a/tools/perf/config/feature-checks/test-volatile-register-var.c b/tools/perf/config/feature-checks/test-volatile-register-var.c
new file mode 100644
index 000000000000..c9f398d87868
--- /dev/null
+++ b/tools/perf/config/feature-checks/test-volatile-register-var.c
@@ -0,0 +1,6 @@
+#include <stdio.h>
+
+int main(void)
+{
+ return puts("hi");
+}
--
1.8.1.4


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