update cmake to build with IAR for g0 and g4

hw/bsp/stm32g4/family.cmake

@@ -11,8 +11,8 @@ set(ST_HAL_DRIVER ${TOP}/hw/mcu/st/stm32${ST_FAMILY}xx_hal_driver)
 set(ST_CMSIS ${TOP}/hw/mcu/st/cmsis_device_${ST_FAMILY})
 set(CMSIS_5 ${TOP}/lib/CMSIS_5)
 
-# enable LTO
-set(CMAKE_INTERPROCEDURAL_OPTIMIZATION TRUE)
+# include board specific
+include(${CMAKE_CURRENT_LIST_DIR}/boards/${BOARD}/board.cmake)
 
 # toolchain set up
 set(CMAKE_SYSTEM_PROCESSOR cortex-m4 CACHE INTERNAL "System Processor")
@@ -20,58 +20,60 @@ set(CMAKE_TOOLCHAIN_FILE ${TOP}/tools/cmake/toolchain/arm_${TOOLCHAIN}.cmake)
 
 set(FAMILY_MCUS STM32G4 CACHE INTERNAL "")
 
-# include board specific
-include(${CMAKE_CURRENT_LIST_DIR}/boards/${BOARD}/board.cmake)
+# enable LTO if supported
+include(CheckIPOSupported)
+check_ipo_supported(RESULT IPO_SUPPORTED)
+if (IPO_SUPPORTED)
+  set(CMAKE_INTERPROCEDURAL_OPTIMIZATION TRUE)
+endif ()
 
 
 #------------------------------------
 # BOARD_TARGET
 #------------------------------------
 # only need to be built ONCE for all examples
-set(BOARD_TARGET board_${BOARD})
-if (NOT TARGET ${BOARD_TARGET})
-  add_library(${BOARD_TARGET} STATIC
-    ${ST_CMSIS}/Source/Templates/system_${ST_PREFIX}.c
-    ${ST_HAL_DRIVER}/Src/${ST_PREFIX}_hal.c
-    ${ST_HAL_DRIVER}/Src/${ST_PREFIX}_hal_cortex.c
-    ${ST_HAL_DRIVER}/Src/${ST_PREFIX}_hal_pwr_ex.c
-    ${ST_HAL_DRIVER}/Src/${ST_PREFIX}_hal_rcc.c
-    ${ST_HAL_DRIVER}/Src/${ST_PREFIX}_hal_rcc_ex.c
-    ${ST_HAL_DRIVER}/Src/${ST_PREFIX}_hal_gpio.c
-    ${ST_HAL_DRIVER}/Src/${ST_PREFIX}_hal_uart.c
-    ${ST_HAL_DRIVER}/Src/${ST_PREFIX}_hal_uart_ex.c
-    )
-  target_include_directories(${BOARD_TARGET} PUBLIC
-    ${CMAKE_CURRENT_LIST_DIR}
-    ${CMSIS_5}/CMSIS/Core/Include
-    ${ST_CMSIS}/Include
-    ${ST_HAL_DRIVER}/Inc
-    )
-  target_compile_options(${BOARD_TARGET} PUBLIC
-    )
-  target_compile_definitions(${BOARD_TARGET} PUBLIC
-    )
-  update_board(${BOARD_TARGET})
-
-  target_sources(${BOARD_TARGET} PUBLIC
-    ${STARTUP_FILE_${TOOLCHAIN}}
-    )
-
-  if (TOOLCHAIN STREQUAL "gcc")
-    target_link_options(${BOARD_TARGET} PUBLIC
-      "LINKER:--script=${LD_FILE_GCC}"
-      -nostartfiles
-      # nanolib
-      --specs=nosys.specs
-      --specs=nano.specs
+function(add_board_target BOARD_TARGET)
+  if (NOT TARGET ${BOARD_TARGET})
+    add_library(${BOARD_TARGET} STATIC
+      ${ST_CMSIS}/Source/Templates/system_${ST_PREFIX}.c
+      ${ST_HAL_DRIVER}/Src/${ST_PREFIX}_hal.c
+      ${ST_HAL_DRIVER}/Src/${ST_PREFIX}_hal_cortex.c
+      ${ST_HAL_DRIVER}/Src/${ST_PREFIX}_hal_pwr_ex.c
+      ${ST_HAL_DRIVER}/Src/${ST_PREFIX}_hal_rcc.c
+      ${ST_HAL_DRIVER}/Src/${ST_PREFIX}_hal_rcc_ex.c
+      ${ST_HAL_DRIVER}/Src/${ST_PREFIX}_hal_gpio.c
+      ${ST_HAL_DRIVER}/Src/${ST_PREFIX}_hal_uart.c
+      ${ST_HAL_DRIVER}/Src/${ST_PREFIX}_hal_uart_ex.c
+      ${STARTUP_FILE_${CMAKE_C_COMPILER_ID}}
       )
-  else ()
-    # TODO support IAR
-    target_link_options(${BOARD_TARGET} PUBLIC
-      "LINKER:--config=${LD_FILE_IAR}"
+    target_include_directories(${BOARD_TARGET} PUBLIC
+      ${CMAKE_CURRENT_FUNCTION_LIST_DIR}
+      ${CMSIS_5}/CMSIS/Core/Include
+      ${ST_CMSIS}/Include
+      ${ST_HAL_DRIVER}/Inc
       )
+    target_compile_options(${BOARD_TARGET} PUBLIC
+      )
+    target_compile_definitions(${BOARD_TARGET} PUBLIC
+      )
+
+    update_board(${BOARD_TARGET})
+
+    if (CMAKE_C_COMPILER_ID STREQUAL "GNU")
+      target_link_options(${BOARD_TARGET} PUBLIC
+        "LINKER:--script=${LD_FILE_GNU}"
+        -nostartfiles
+        # nanolib
+        --specs=nosys.specs
+        --specs=nano.specs
+        )
+    elseif (CMAKE_C_COMPILER_ID STREQUAL "IAR")
+      target_link_options(${BOARD_TARGET} PUBLIC
+        "LINKER:--config=${LD_FILE_IAR}"
+        )
+    endif ()
   endif ()
-endif () # BOARD_TARGET
+endfunction()
 
 
 #------------------------------------
@@ -80,6 +82,9 @@ endif () # BOARD_TARGET
 function(family_configure_example TARGET)
   family_configure_common(${TARGET})
 
+  # Board target
+  add_board_target(board_${BOARD})
+
   #---------- Port Specific ----------
   # These files are built for each example since it depends on example's tusb_config.h
   target_sources(${TARGET} PUBLIC
@@ -100,7 +105,7 @@ function(family_configure_example TARGET)
   family_add_tinyusb(${TARGET} OPT_MCU_STM32G4)
 
   # Link dependencies
-  target_link_libraries(${TARGET} PUBLIC ${BOARD_TARGET} ${TARGET}-tinyusb)
+  target_link_libraries(${TARGET} PUBLIC board_${BOARD} ${TARGET}-tinyusb)
 
   # Flashing
   family_flash_stlink(${TARGET})