diff --git a/cross_arm.txt b/cross_arm.txt
index 41717a79..48e16c08 100644
--- a/cross_arm.txt
+++ b/cross_arm.txt
@@ -19,6 +19,9 @@ c_args      = [
                '-mthumb',                   # ARM Thumb2 ISA
                '-mfloat-abi=hard',          # Hard floating point support
                '-mfpu=fpv4-sp-d16',
+               '-fdata-sections',
+               '-ffunction-sections',
+               '-Os'
               ]
 
 c_link_args = [