Improve compile options

Author: Deniskore

binlog_json_parser/CMakeLists.txt

@@ -1,7 +1,55 @@
-cmake_minimum_required(VERSION 3.0)
+cmake_minimum_required(VERSION 3.20)
+
 project(binlog_json_parser)
 
 set(CMAKE_CXX_STANDARD 23)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+
+# Check if the build type is Release
+if(CMAKE_BUILD_TYPE STREQUAL "Release")
+
+    # Set optimization level to -O3 for release builds
+    if(NOT CMAKE_CXX_FLAGS_RELEASE MATCHES "-O")
+        set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -O3")
+    endif()
+
+    # Option to add march-native for release builds
+    option(USE_MARCH_NATIVE "Enable -march=native for release builds" OFF)
+
+    # Determine the architecture
+    include(CMakeDetermineSystem)
+
+    if(CMAKE_SYSTEM_PROCESSOR MATCHES "^(86|x86_64)$")
+        if(USE_MARCH_NATIVE)
+            set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -march=native")
+        else()
+            # Set default march flag to skylake (2015 year) if not using native
+            if(NOT CMAKE_CXX_FLAGS_RELEASE MATCHES "march=")
+                set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -march=skylake")
+            endif()
+        endif()
+    else()
+        message(WARNING "The -march option will not be set because the system is not x86 or x64.")
+    endif()
+
+    # Check for LTO support
+    include(CheckCXXCompilerFlag)
+
+    check_cxx_compiler_flag("-flto" COMPILER_SUPPORTS_LTO)
+
+    if(COMPILER_SUPPORTS_LTO)
+        message(STATUS "Link Time Optimization (LTO) is supported by the compiler.")
+        set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -flto")
+        set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -flto")
+        set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -flto")
+    else()
+        message(WARNING "Link Time Optimization (LTO) is not supported by the compiler.")
+    endif()
+
+    # Export compile flags to a file
+    file(WRITE "${CMAKE_BINARY_DIR}/compile_flags.txt" "CXXFLAGS: ${CMAKE_CXX_FLAGS_RELEASE}\n")
+    file(APPEND "${CMAKE_BINARY_DIR}/compile_flags.txt" "LINKER_FLAGS: ${CMAKE_EXE_LINKER_FLAGS}\n")
+
+endif()
 
-#add_executable(binlog_json_parser main.cpp mysql_json_parser.cpp)
 add_library(mysqljsonparse SHARED mysqljsonparse.cpp mysql_json_parser.cpp)