From ededa875d6d1b5947e4516588489b1c8c64e940f Mon Sep 17 00:00:00 2001
From: Timerix22 <timerix11@gmail.com>
Date: Fri, 19 May 2023 19:44:39 +0600
Subject: [PATCH] unused code removal during linkage

---
 cbuild         | 2 +-
 default.config | 6 ++++--
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/cbuild b/cbuild
index e8e4242..991ee07 160000
--- a/cbuild
+++ b/cbuild
@@ -1 +1 @@
-Subproject commit e8e42424d329ef1e75fb827ddf85d55b4cd89169
+Subproject commit 991ee072b3b0e4507c80dfac873c7d41d06f0b69
diff --git a/default.config b/default.config
index 241c3ca..8116b7a 100644
--- a/default.config
+++ b/default.config
@@ -46,7 +46,9 @@ 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="$CPP_ARGS"
         PRE_TASK_SCRIPT=
@@ -82,7 +84,7 @@ case "$TASK" in
         ;;
     # creates static library
     build_static_lib)
-        C_ARGS="-O2 -fpic"
+        C_ARGS="-O2 -fpic -fdata-sections -ffunction-sections"
         CPP_ARGS="$C_ARGS"
         PRE_TASK_SCRIPT=
         TASK_SCRIPT=cbuild/default_tasks/build_static_lib.sh