From ad33383e806d22d880a353e013258f2796e9d0c9 Mon Sep 17 00:00:00 2001
From: Thorsten Otto <admin@tho-otto.de>
Date: Fri, 22 Mar 2024 09:55:59 +0100
Subject: [PATCH] Add check whether compiler supports
 -fdata-sections/-ffunction-sections

---
 CMakeLists.txt | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3ce8dad3..be15b5f1 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -2,6 +2,7 @@ cmake_minimum_required(VERSION 3.10)
 
 set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_SOURCE_DIR}/cmake/")
 include(FeatureSummary)
+include(CheckCXXCompilerFlag)
 
 if(NOT DEFINED CMAKE_BUILD_TYPE)
     set(CMAKE_BUILD_TYPE "Debug" CACHE STRING "Choose the type of build, options are: Debug Release RelWithDebInfo" FORCE)
@@ -82,6 +83,24 @@ if(NOT MSVC)
         set(CMAKE_FIND_FRAMEWORK "LAST")
     endif()
 
+    message(STATUS "Checking whether compiler supports -fdata-sections")
+    check_cxx_compiler_flag("-Werror -fdata-sections" HAVE_DATA_SECTIONS)
+    if(HAVE_DATA_SECTIONS)
+      message(STATUS "yes")
+      set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fdata-sections")
+    else()
+      message(STATUS "no")
+    endif()
+
+    message(STATUS "Checking whether compiler supports -ffunction-sections")
+    check_cxx_compiler_flag("-Werror -ffunction-sections" HAVE_FUNCTION_SECTIONS)
+    if(HAVE_FUNCTION_SECTIONS)
+      message(STATUS "yes")
+      set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -ffunction-sections")
+    else()
+      message(STATUS "no")
+    endif()
+
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -w -Wwrite-strings -Werror=write-strings -fcheck-new -fsigned-char -fdata-sections -ffunction-sections -DNOMINMAX")
 else()
     set(CMAKE_CXX_FLAGS "/Zc:strictStrings")