diff --git a/backend.native/konan.properties b/backend.native/konan.properties
index 3f3d9db1553..49734a474e5 100644
--- a/backend.native/konan.properties
+++ b/backend.native/konan.properties
@@ -123,8 +123,9 @@ linkerKonanFlags.raspberrypi = -Bstatic -lstdc++ -Bdynamic -ldl -lm -lpthread
 # targetSysroot-relative.
 libGcc.raspberrypi = lib/gcc/arm-linux-gnueabihf/4.8.3
 llvmLtoFlags.raspberrypi = -exported-symbol=Konan_main
+llvmLtoOptFlags.raspberrypi = -O3 -function-sections
+llvmLtoNooptFlags.raspberrypi = -O1
 dynamicLinker.raspberrypi = /lib/ld-linux-armhf.so.3
-llvmLtoFlags.linux = -exported-symbol=Konan_main
 # targetSysRoot relative
 abiSpecificLibraries.raspberrypi = \
     ../lib/arm-linux-gnueabihf \
@@ -149,6 +150,8 @@ dependencies.linux-android_arm32 = \
 quadruple.android_arm32 = arm-linux-androideabi
 entrySelector.android_arm32 =  -Wl,--defsym -Wl,main=Konan_main
 llvmLtoFlags.android_arm32 = -exported-symbol=Konan_main -emulated-tls
+llvmLtoOptFlags.android_arm32 = -O3 -function-sections
+llvmLtoNooptFlags.android_arm32 = -O1
 targetSysRoot.android_arm32 = target-sysroot-21-android_arm32
 libffiDir.android_arm32 = libffi-3.2.1-2-android_arm32
 linkerKonanFlags.android_arm32 = -lm -latomic -lstdc++