[PATCH v1] perf build: Add -funsigned-char to default CFLAGS

[Ian Rogers]

Commit 3bc753c06dd0 ("kbuild: treat char as always unsigned") made
chars unsigned by default in the Linux kernel. To avoid similar kinds
of bugs and warnings, make unsigned chars the default for the perf tool.

Signed-off-by: Ian Rogers <irogers@xxxxxxxxxx>
---
 tools/perf/Makefile.config | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config
index a8dc72cfe48e..3820bdf73f43 100644
--- a/tools/perf/Makefile.config
+++ b/tools/perf/Makefile.config
@@ -349,6 +349,7 @@ CORE_CFLAGS += -fno-omit-frame-pointer
 CORE_CFLAGS += -Wall
 CORE_CFLAGS += -Wextra
 CORE_CFLAGS += -std=gnu11
+CORE_CFLAGS += -funsigned-char
 
 CXXFLAGS += -std=gnu++17 -fno-exceptions -fno-rtti
 CXXFLAGS += -Wall
-- 
2.53.0.473.g4a7958ca14-goog