-l crypto \
-Wl,-Bstatic -lpthread -Wl,-Bdynamic
+xOPT_LEVEL=-O2
+ifeq (${USE_O3}, 1)
+ xOPT_LEVEL=-O3
+endif
+
DEFS=-D_MT -DWIN32 -D_WINDOWS -DBOOST_THREAD_USE_LIB -DBOOST_SPIRIT_THREADSAFE -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
DEBUGFLAGS=-g
-CFLAGS=-O2 -msse2 -w -Wall -Wextra -Wno-ignored-qualifiers -Wformat -Wformat-security -Wno-unused-parameter $(DEBUGFLAGS) $(DEFS) $(INCLUDEPATHS)
+CFLAGS=$(xOPT_LEVEL) -msse2 -w -Wall -Wextra -Wno-ignored-qualifiers -Wformat -Wformat-security -Wno-unused-parameter $(DEBUGFLAGS) $(DEFS) $(INCLUDEPATHS)
LDFLAGS=-Wl,--dynamicbase -Wl,--nxcompat -static-libgcc -static-libstdc++
ifndef USE_UPNP