diff --git a/default.config b/default.config
index db6ac8d..ca850d5 100644
--- a/default.config
+++ b/default.config
@@ -49,7 +49,9 @@ case "$TASK" in
         # -fuse-linker-plugin is required to use static libs with lto
         # -fprofile-use enables compiler to use profiling info files to optimize executable
         # -fprofile-prefix-path sets path where profiling info about objects are be saved
-        C_ARGS="-O2 -flto=auto -fuse-linker-plugin -fprofile-use -fprofile-prefix-path=$(realpath $OBJDIR)/objects"
+        # -fdata-sections -ffunction-sections -Wl,--gc-sections  removes unused code
+        C_ARGS="-O2 -flto=auto -fuse-linker-plugin -fprofile-use -fprofile-prefix-path=$(realpath $OBJDIR)/objects \
+-fdata-sections -ffunction-sections -Wl,--gc-sections"
         CPP_ARGS="$C_ARGS"
         LINKER_ARGS="$CPP_ARGS"
         PRE_TASK_SCRIPT=