[PATCH v1 3/6] perf build: Add Wextra for C++ compilation

[Ian Rogers]

Commit d58ac0bf8d1e ("perf build: Add clang and llvm compile and
linking support") added -Wall and -Wno-strict-aliasing for CXXFLAGS,
but not -Wextra. -Wno-strict-aliasing is no longer necessary, adding
-Wextra for CXXFLAGS requires adding -Wno-unused-parameter clang.cpp
and clang-test.cpp for LIBCLANGLLVM=1 to build.

Signed-off-by: Ian Rogers <irogers@xxxxxxxxxx>
---
 tools/perf/Makefile.config | 2 +-
 tools/perf/util/c++/Build  | 3 +++
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config
index 14709a6bd622..fe7afe6d8529 100644
--- a/tools/perf/Makefile.config
+++ b/tools/perf/Makefile.config
@@ -333,8 +333,8 @@ CORE_CFLAGS += -std=gnu11
 
 CXXFLAGS += -std=gnu++14 -fno-exceptions -fno-rtti
 CXXFLAGS += -Wall
+CXXFLAGS += -Wextra
 CXXFLAGS += -fno-omit-frame-pointer
-CXXFLAGS += -Wno-strict-aliasing
 
 HOSTCFLAGS += -Wall
 HOSTCFLAGS += -Wextra
diff --git a/tools/perf/util/c++/Build b/tools/perf/util/c++/Build
index 613ecfd76527..8610d032ac19 100644
--- a/tools/perf/util/c++/Build
+++ b/tools/perf/util/c++/Build
@@ -1,2 +1,5 @@
 perf-$(CONFIG_CLANGLLVM) += clang.o
 perf-$(CONFIG_CLANGLLVM) += clang-test.o
+
+CXXFLAGS_clang.o += -Wno-unused-parameter
+CXXFLAGS_clang-test.o += -Wno-unused-parameter
-- 
2.41.0.487.g6d72f3e995-goog