add lto for cmake

tools/cmake/cpu/cortex-m33.cmake

@@ -3,7 +3,6 @@ if (TOOLCHAIN STREQUAL "gcc")
     -mthumb
     -mcpu=cortex-m33
     -mfloat-abi=hard
-    #-mfpu=fpv5-d16
     -mfpu=fpv5-sp-d16
     )
 

tools/cmake/toolchain/arm_gcc.cmake

@@ -4,9 +4,11 @@ set(CMAKE_ASM_COMPILER "arm-none-eabi-gcc")
 set(CMAKE_C_COMPILER "arm-none-eabi-gcc")
 set(CMAKE_CXX_COMPILER "arm-none-eabi-g++")
 
-set(TOOLCHAIN_SIZE "arm-none-eabi-size" CACHE INTERNAL "")
-set(GCC_ELF2BIN "arm-none-eabi-objcopy")
-set_property(GLOBAL PROPERTY ELF2BIN ${GCC_ELF2BIN})
+set(CMAKE_SIZE "arm-none-eabi-size" CACHE FILEPATH "")
+set(CMAKE_OBJCOPY "arm-none-eabi-objcopy" CACHE FILEPATH "")
+set(CMAKE_OBJDUMP "arm-none-eabi-objdump" CACHE FILEPATH "")
+
+set_property(GLOBAL PROPERTY TARGET_SUPPORTS_SHARED_LIBS FALSE)
 
 # Look for includes and libraries only in the target system prefix.
 set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)

tools/cmake/toolchain/set_flags.cmake

@@ -1,16 +1,16 @@
 include(CMakePrintHelpers)
-foreach(LANG IN ITEMS C CXX ASM)
-    # join the toolchain flags into a single string
-    list(APPEND TOOLCHAIN_${LANG}_FLAGS ${TOOLCHAIN_COMMON_FLAGS})
-    list(JOIN TOOLCHAIN_${LANG}_FLAGS " " TOOLCHAIN_${LANG}_FLAGS)
-    set(CMAKE_${LANG}_FLAGS_INIT "${TOOLCHAIN_${LANG}_FLAGS}")
+foreach (LANG IN ITEMS C CXX ASM)
+  # join the toolchain flags into a single string
+  list(APPEND TOOLCHAIN_${LANG}_FLAGS ${TOOLCHAIN_COMMON_FLAGS})
+  list(JOIN TOOLCHAIN_${LANG}_FLAGS " " TOOLCHAIN_${LANG}_FLAGS)
+  set(CMAKE_${LANG}_FLAGS_INIT "${TOOLCHAIN_${LANG}_FLAGS}")
 
-    #cmake_print_variables(CMAKE_${LANG}_FLAGS_INIT)
+  #cmake_print_variables(CMAKE_${LANG}_FLAGS_INIT)
 
-    # optimization flags
-    set(CMAKE_${LANG}_FLAGS_RELEASE_INIT "-Os")
-    set(CMAKE_${LANG}_FLAGS_DEBUG_INIT "-O0")
-endforeach()
+  # optimization flags for LOG, LOGGER ?
+  #set(CMAKE_${LANG}_FLAGS_RELEASE_INIT "-Os")
+  #set(CMAKE_${LANG}_FLAGS_DEBUG_INIT "-O0")
+endforeach ()
 
 # Linker
 list(JOIN TOOLCHAIN_EXE_LINKER_FLAGS " " CMAKE_EXE_LINKER_FLAGS_INIT)
@@ -18,7 +18,7 @@ list(JOIN TOOLCHAIN_EXE_LINKER_FLAGS " " CMAKE_EXE_LINKER_FLAGS_INIT)
 # try_compile is cmake test compiling its own example,
 # pass -nostdlib to skip stdlib linking
 get_property(IS_IN_TRY_COMPILE GLOBAL PROPERTY IN_TRY_COMPILE)
-if(IS_IN_TRY_COMPILE)
-    set(CMAKE_C_LINK_FLAGS "${CMAKE_C_LINK_FLAGS} -nostdlib")
-    set(CMAKE_CXX_LINK_FLAGS "${CMAKE_CXX_LINK_FLAGS} -nostdlib")
-endif()
+if (IS_IN_TRY_COMPILE)
+  set(CMAKE_C_LINK_FLAGS "${CMAKE_C_LINK_FLAGS} -nostdlib")
+  set(CMAKE_CXX_LINK_FLAGS "${CMAKE_CXX_LINK_FLAGS} -nostdlib")
+endif ()