From d7b0e02bc87bbc2ab21a4f03b7a5c5cf22e89f0e Mon Sep 17 00:00:00 2001
From: Felix Morgner <felix.morgner@ost.ch>
Date: Sun, 8 Oct 2023 12:46:46 +0200
Subject: build: enable more optimizations

---
 source/cmake/Platforms/x86_64.cmake | 4 ++--
 source/kernel/CMakeLists.txt        | 4 ++++
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/source/cmake/Platforms/x86_64.cmake b/source/cmake/Platforms/x86_64.cmake
index 25aa27b..14841ec 100644
--- a/source/cmake/Platforms/x86_64.cmake
+++ b/source/cmake/Platforms/x86_64.cmake
@@ -8,10 +8,10 @@ mark_as_advanced(CRT_BEGIN)
 string(REGEX REPLACE "/crtbegin.o" "" CMAKE_SYSROOT "${CRT_BEGIN}")
 mark_as_advanced(CMAKE_SYSROOT)
 
-set(CMAKE_CXX_FLAGS_INIT "-m64 -mno-red-zone -mcmodel=large -fno-exceptions")
+set(CMAKE_CXX_FLAGS_INIT "-m64 -mno-red-zone -mcmodel=large -fno-exceptions -ffunction-sections -fdata-sections")
 set(CMAKE_CXX_FLAGS_DEBUG "-ggdb3")
 set(CMAKE_ASM_FLAGS_DEBUG "-ggdb3")
-set(CMAKE_EXE_LINKER_FLAGS_INIT "-nostartfiles")
+set(CMAKE_EXE_LINKER_FLAGS_INIT "-nostartfiles -Wl,-gc-sections")
 set(CMAKE_CXX_LINK_EXECUTABLE
   "<CMAKE_CXX_COMPILER> \
   <FLAGS> \
diff --git a/source/kernel/CMakeLists.txt b/source/kernel/CMakeLists.txt
index 54bdb8b..bc60f6c 100644
--- a/source/kernel/CMakeLists.txt
+++ b/source/kernel/CMakeLists.txt
@@ -14,6 +14,10 @@ target_compile_options("kernel" PRIVATE
   "$<$<CXX_COMPILER_ID:GNU>:-pedantic-errors>"
 )
 
+set_target_properties("kernel" PROPERTIES
+  INTERPROCEDURAL_OPTIMIZATION YES
+)
+
 #[============================================================================[
 # Apply the platform dependent settings to the kernel image.
 #]============================================================================]
-- 
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