diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7fa930c..e14b1bd 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -31,12 +31,10 @@ if(WIN32)
   set(OS_LIBS ${winpcap_LIBRARY} ${packet_LIBRARY} Ws2_32.lib Winmm.lib)
 elseif(UNIX AND NOT APPLE)
   set(OS "linux")
-  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Wextra -Werror")
   set(OS_LIBS pthread rt)
 elseif(APPLE)
   # This must come *before* linux or MacOSX will identify as Unix.
   set(OS "macosx")
-  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Wextra -Werror")
   set(OS_LIBS pthread pcap)
 elseif(${CMAKE_SYSTEM_NAME} MATCHES "rt-kernel")
   set(OS "rtk")
@@ -45,10 +43,6 @@ elseif(${CMAKE_SYSTEM_NAME} MATCHES "rt-kernel")
   include_directories(oshw/${OS}/${ARCH})
   file(GLOB OSHW_EXTRA_SOURCES oshw/${OS}/${ARCH}/*.c)
   set(OSHW_SOURCES "${OS_HW_SOURCES} ${OSHW_ARCHSOURCES}")
-  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Wextra -Werror")
-  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wno-unused-but-set-variable")
-  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wno-unused-function")
-  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wno-format")
   set(OS_LIBS "-Wl,--start-group -l${BSP} -l${ARCH} -lkern -ldev -lsio -lblock -lfs -lusb -llwip -leth -li2c -lrtc -lcan -lnand -lspi -lnor -lpwm -ladc -ltrace -lc -lm -Wl,--end-group")
 elseif(${CMAKE_SYSTEM_NAME} MATCHES "rtems")
   message(STATUS "Building for RTEMS")