diff --git a/tools/cmake/compiler_flags.cmake b/tools/cmake/compiler_flags.cmake
index 55829408..8269b010 100644
--- a/tools/cmake/compiler_flags.cmake
+++ b/tools/cmake/compiler_flags.cmake
@@ -1,7 +1,8 @@
-list(APPEND GLOBAL_C_FLAGS -Os -g3)
+list(APPEND GLOBAL_C_FLAGS -O2 -g3)
 list(APPEND GLOBAL_C_FLAGS -fno-jump-tables -fshort-enums -fno-common -fms-extensions -ffunction-sections -fdata-sections -fstrict-volatile-bitfields -ffast-math)
 list(APPEND GLOBAL_C_FLAGS -Wall -Wshift-negative-value -Wchar-subscripts -Wformat -Wuninitialized -Winit-self -Wignored-qualifiers -Wunused -Wundef)
 list(APPEND GLOBAL_C_FLAGS -msmall-data-limit=4)
+list(APPEND GLOBAL_C_FLAGS -Wtype-limits)
 
 list(APPEND GLOBAL_LD_FLAGS -Wl,--cref -Wl,--gc-sections -nostartfiles -g3)
 list(APPEND GLOBAL_LD_FLAGS -fms-extensions -ffunction-sections -fdata-sections)