[PATCH v1 4/4] perf build: Add LTO build option

[Ian Rogers]

Add an LTO build option, that sets the appropriate CFLAGS and CXXFLAGS
values.

Signed-off-by: Ian Rogers <irogers@xxxxxxxxxx>
---
 tools/perf/Makefile.config | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config
index c5db0de49868..a9cfe83638a9 100644
--- a/tools/perf/Makefile.config
+++ b/tools/perf/Makefile.config
@@ -256,6 +256,11 @@ ifdef PARSER_DEBUG
   $(call detected_var,PARSER_DEBUG_FLEX)
 endif
 
+ifdef LTO
+  CORE_CFLAGS += -flto
+  CXXFLAGS += -flto
+endif
+
 # Try different combinations to accommodate systems that only have
 # python[2][3]-config in weird combinations in the following order of
 # priority from lowest to highest:
-- 
2.41.0.487.g6d72f3e995-goog