diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0272d671c..1740cc44f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -107,6 +107,25 @@ endif()
 add_definitions(-DIN_LINPHONE)
 
 
+if(MSVC)
+	set(CMAKE_C_FLAGS "/W3")
+	set(CMAKE_CXX_FLAGS "/W3")
+else()
+	set(CMAKE_C_FLAGS "-Wall -Wuninitialized -Wdeclaration-after-statement -fno-strict-aliasing -Werror")
+	set(CMAKE_CXX_FLAGS "-Wall -Wuninitialized -Werror")
+	if(CMAKE_C_COMPILER_ID STREQUAL "Clang")
+		set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Qunused-arguments -Wno-array-bounds")
+	endif()
+	if(CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
+		set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Qunused-arguments -Wno-array-bounds")
+	endif()
+	if(APPLE)
+		set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wno-error=unknown-warning-option -Wno-tautological-compare -Wno-unused-function")
+		set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-error=unknown-warning-option -Wno-tautological-compare -Wno-unused-function")
+	endif()
+endif()
+
+
 set(GETTEXT_PACKAGE "linphone")
 if(ENABLE_RELATIVE_PREFIX)
 	set(LINPHONE_DATA_DIR ".")