Index: deps/v8/tools/gcmole/Makefile
--- deps/v8/tools/gcmole/Makefile.orig
+++ deps/v8/tools/gcmole/Makefile
@@ -32,7 +32,7 @@ LLVM_BUILD_INCLUDE:=$(BUILD_ROOT)/include
 CLANG_SRC_INCLUDE:=$(CLANG_SRC_ROOT)/include
 CLANG_BUILD_INCLUDE:=$(BUILD_ROOT)/tools/clang/include
 
-CXXFLAGS = -O3 -g3
+CXXFLAGS = -g3
 all: libgcmole.so
 Release: libgcmole.so