diff --git a/lib_acl/CMakeLists.txt b/lib_acl/CMakeLists.txt
index 9ed767b99..9e7d10a42 100644
--- a/lib_acl/CMakeLists.txt
+++ b/lib_acl/CMakeLists.txt
@@ -26,6 +26,11 @@ elseif (CMAKE_SYSTEM_NAME MATCHES "Linux")
 elseif (CMAKE_SYSTEM_NAME MATCHES "Darwin")
 	add_definitions("-O3")
 	add_definitions("-Wno-invalid-source-encoding")
+	add_definitions("-fvisibility=hidden")
+	add_definitions("-fvisibility-inlines-hidden")
+	add_definitions("-fdata-sections -ffunction-sections")
+	add_definitions("-flto")
+	add_definitions("-Os")
 	set(UNIX_OS true)
 elseif (CMAKE_SYSTEM_NAME MATCHES "FreeBSD")
 	add_definitions("-O2")
diff --git a/lib_acl/Makefile b/lib_acl/Makefile
index 9b3e9427b..c700b6cdf 100644
--- a/lib_acl/Makefile
+++ b/lib_acl/Makefile
@@ -16,7 +16,6 @@ LIB_NAME  = libacl.a
 #CFLAGS = -c -g -W -Wall -Wcast-qual -Wcast-align
 
 CFLAGS = -c -g -W \
--O3 \
 -fPIC \
 -Wall \
 -Werror \
@@ -101,7 +100,13 @@ endif
 # For Darwin
 ifeq ($(findstring Darwin, $(UNIXNAME)), Darwin)
 	CFLAGS += -Wno-invalid-source-encoding \
-		  -Wno-invalid-offsetof
+		  -Wno-invalid-offsetof \
+		  -fvisibility=hidden \
+		  -fvisibility-inlines-hidden \
+		  -fdata-sections \
+		  -ffunction-sections \
+		  -flto \
+		  -Os
 	UNIXTYPE = MACOSX
 	RPATH = macos
 endif
@@ -117,6 +122,7 @@ ifeq ($(findstring Linux, $(UNIXNAME)), Linux)
 #		CFLAGS += -m64
 		RPATH = linux64
 	endif
+	CFLAGS += -O3
 endif
 
 ifeq ($(findstring HAS_TRACE, $(FLAGS)), HAS_TRACE)
diff --git a/lib_acl_cpp/CMakeLists.txt b/lib_acl_cpp/CMakeLists.txt
index 3114d80c6..593edba3a 100644
--- a/lib_acl_cpp/CMakeLists.txt
+++ b/lib_acl_cpp/CMakeLists.txt
@@ -26,6 +26,10 @@ elseif(CMAKE_SYSTEM_NAME MATCHES "FreeBSD")
 	set(UNIX_OS true)
 elseif(CMAKE_SYSTEM_NAME MATCHES "Darwin")
 	add_definitions("-Wno-invalid-source-encoding")
+	add_definitions("-fvisibility=hidden")
+	add_definitions("-fvisibility-inlines-hidden")
+	add_definitions("-fdata-sections -ffunction-sections")
+	add_definitions("-flto")
 	add_definitions("-Os")
 	set(UNIX_OS true)
 elseif (CMAKE_SYSTEM_NAME MATCHES "Windows")
diff --git a/lib_acl_cpp/Makefile b/lib_acl_cpp/Makefile
index f3553a539..ed2187ad9 100644
--- a/lib_acl_cpp/Makefile
+++ b/lib_acl_cpp/Makefile
@@ -9,7 +9,6 @@ RANLIB  = ${ENV_RANLIB}
 FLAGS   = ${ENV_FLAGS}
 
 CFLAGS = -c -g -W \
--O3 \
 -fPIC \
 -Wall \
 -Werror \
@@ -94,7 +93,13 @@ endif
 ifeq ($(findstring Darwin, $(UNIXNAME)), Darwin)
 	CFLAGS += -Wno-invalid-source-encoding \
 		  -Wno-invalid-offsetof \
-		  -Wno-unused-private-field
+		  -Wno-unused-private-field \
+		  -fvisibility=hidden \
+		  -fvisibility-inlines-hidden \
+		  -fdata-sections \
+		  -ffunction-sections \
+		  -flto \
+		  -Os
 	CFLAGS += -Wshadow
 	UNIXTYPE = MACOSX
 	shared_ldflags = -lprotocol -lacl -L/usr/lib -liconv -lz -lpthread
@@ -104,6 +109,7 @@ endif
 ifeq ($(findstring Linux, $(UNIXNAME)), Linux)
 	UNIXTYPE = LINUX
 	CFLAGS += -Wshadow
+	CFLAGS += -O3
 	shared_ldflags = -lprotocol -lacl -lrt -lpthread -lz -ldl
 endif
 
diff --git a/lib_protocol/CMakeLists.txt b/lib_protocol/CMakeLists.txt
index 9b6df1d39..17a21546e 100644
--- a/lib_protocol/CMakeLists.txt
+++ b/lib_protocol/CMakeLists.txt
@@ -25,6 +25,10 @@ elseif (CMAKE_SYSTEM_NAME MATCHES "FreeBSD")
 	set(UNIX_OS true)
 elseif (CMAKE_SYSTEM_NAME MATCHES "Darwin")
 	add_definitions("-Wno-invalid-source-encoding")
+	add_definitions("-fvisibility=hidden")
+	add_definitions("-fvisibility-inlines-hidden")
+	add_definitions("-fdata-sections -ffunction-sections")
+	add_definitions("-flto")
 	add_definitions("-Os")
 	set(UNIX_OS true)
 elseif (CMAKE_SYSTEM_NAME MATCHES "Windows")
diff --git a/lib_protocol/Makefile b/lib_protocol/Makefile
index fc9891112..1306108e8 100644
--- a/lib_protocol/Makefile
+++ b/lib_protocol/Makefile
@@ -8,7 +8,6 @@ ARFL    = rv
 RANLIB  = ${ENV_RANLIB}
 
 CFLAGS = -c -g -W \
--O3 \
 -fPIC \
 -Wall \
 -Werror \
@@ -71,13 +70,20 @@ endif
 # For Darwin
 ifeq ($(findstring Darwin, $(UNIXNAME)), Darwin)
 	CFLAGS += -Wno-invalid-source-encoding \
-		  -Wno-invalid-offsetof
+		  -Wno-invalid-offsetof \
+		  -fvisibility=hidden \
+		  -fvisibility-inlines-hidden \
+		  -fdata-sections \
+		  -ffunction-sections \
+		  -flto \
+		  -Os
 	UNIXTYPE = MACOSX
 endif
 
 # For Linux
 ifeq ($(findstring Linux, $(UNIXNAME)), Linux)
 	UNIXTYPE = LINUX
+	CFLAGS += -O3
 endif
 
 # For MINGW