From cef9addbbb51b1888cdbfe45221e2dbf785e9ef0 Mon Sep 17 00:00:00 2001
From: chao an <anchao@lixiang.com>
Date: Fri, 5 Jul 2024 21:42:46 +0800
Subject: [PATCH] sim/cmake: enable garbage collection of unused input sections

enable --gc-sections for linker
enable -ffunction-sections -fdata-sections for compiler

Signed-off-by: chao an <anchao@lixiang.com>
---
 arch/sim/src/cmake/Toolchain.cmake | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/sim/src/cmake/Toolchain.cmake b/arch/sim/src/cmake/Toolchain.cmake
index 90aa92a33b294..c787a9fe3076f 100644
--- a/arch/sim/src/cmake/Toolchain.cmake
+++ b/arch/sim/src/cmake/Toolchain.cmake
@@ -94,6 +94,11 @@ else()
   endif()
 endif()
 
+if(CONFIG_DEBUG_OPT_UNUSED_SECTIONS)
+  add_link_options(-Wl,--gc-sections)
+  add_compile_options(-ffunction-sections -fdata-sections)
+endif()
+
 if(CONFIG_CXX_STANDARD)
   add_compile_options($<$<COMPILE_LANGUAGE:CXX>:-std=${CONFIG_CXX_STANDARD}>)
 endif()