diff --git a/cmake/build/core.cmake b/cmake/build/core.cmake
index d16fe028..0056c36c 100644
--- a/cmake/build/core.cmake
+++ b/cmake/build/core.cmake
@@ -21,10 +21,16 @@ set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Werror")
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -O2")
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -pedantic")
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -pedantic-errors")
+
 set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -DDEBUG")
 set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -O0")
 set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -g2")
 
+if(${CMAKE_CXX_COMPILER_ID} STREQUAL GNU)
+  set(CMAKE_CXX_FLAGS_MINSIZEREL "${CMAKE_CXX_FLAGS_MINSIZEREL} -fdata-sections -ffunction-sections")
+  set(CMAKE_EXE_LINKER_FLAGS_MINSIZEREL "${CMAKE_EXE_LINKER_FLAGS_MINSIZEREL} -Wl,--gc-sections,--icf=safe")
+endif()
+
 # Check compiler
 if(${CMAKE_CXX_COMPILER_ID} STREQUAL Clang)
   if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS "3.4.0")
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index a24d149e..4e650e28 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -141,6 +141,7 @@ make_executable(${PROJECT_NAME} SOURCES
 target_link_libraries(${PROJECT_NAME} Threads::Threads)
 
 target_compile_options(${PROJECT_NAME} PUBLIC
+  $<$<CXX_COMPILER_ID:GNU>:$<$<CONFIG:MinSizeRel>:-flto>>
   ${X11_Xft_DEFINITIONS}
   ${X11_XCB_DEFINITIONS}
   ${XCB_DEFINITIONS})
@@ -150,6 +151,8 @@ target_compile_options(${PROJECT_NAME} PUBLIC
 
 if(BUILD_IPC_MSG)
   make_executable(${PROJECT_NAME}-msg SOURCES ipc.cpp utils/file.cpp)
+  target_compile_options(${PROJECT_NAME}-msg PUBLIC
+    $<$<CXX_COMPILER_ID:GNU>:$<$<CONFIG:MinSizeRel>:-flto>>)
 endif()
 
 # }}}