[bsp][ra6m3-hmi-board] support gcc and llvm-arm toolchain. (#7553)

Co-authored-by: Man, Jianting (Meco) <920369182@qq.com>

.github/workflows/action.yml

@@ -290,6 +290,7 @@ jobs:
             RTT_TOOL_CHAIN: "llvm-arm"
             SUB_RTT_BSP:  
                 - "stm32/stm32l475-atk-pandora"
+                - "renesas/ra6m3-hmi-board"
     steps:
       - uses: actions/checkout@v3
       - name: Set up Python

bsp/renesas/ra6m3-hmi-board/SConscript

@@ -12,7 +12,7 @@ list = os.listdir(cwd)
 if rtconfig.PLATFORM in ['iccarm']:
     print("\nThe current project does not support IAR build\n")
     Return('group')
-elif rtconfig.PLATFORM in ['gcc', 'armclang']:
+elif rtconfig.PLATFORM in ['gcc', 'armclang', 'llvm-arm']:
     if GetOption('target') != 'mdk5':
         CPPPATH = [cwd]
         src = Glob('./src/*.c')

bsp/renesas/ra6m3-hmi-board/board/ports/audio/SConscript

@@ -11,7 +11,7 @@ src += Glob('pwm_audio.c')
 CPPPATH = [cwd]
 LOCAL_CFLAGS = ''
 
-if rtconfig.PLATFORM in ['gcc', 'armclang']:
+if rtconfig.PLATFORM in ['gcc', 'armclang', 'llvm-arm']:
     LOCAL_CFLAGS += ' -std=c99'
 elif rtconfig.PLATFORM in ['armcc']:
     LOCAL_CFLAGS += ' --c99'

bsp/renesas/ra6m3-hmi-board/board/ports/avi/SConscript

@@ -8,7 +8,7 @@ src = Glob('*.c')
 CPPPATH = [cwd]
 LOCAL_CFLAGS = ''
 
-if rtconfig.PLATFORM in ['gcc', 'armclang']:
+if rtconfig.PLATFORM in ['gcc', 'armclang', 'llvm-arm']:
     LOCAL_CFLAGS += ' -std=c99'
 elif rtconfig.PLATFORM in ['armcc']:
     LOCAL_CFLAGS += ' --c99'

bsp/renesas/ra6m3-hmi-board/board/ports/wifi/SConscript

@@ -12,7 +12,7 @@ if GetDepend(['BSP_USING_RW007']):
 CPPPATH = [cwd]
 LOCAL_CFLAGS = ''
 
-if rtconfig.PLATFORM in ['gcc', 'armclang']:
+if rtconfig.PLATFORM in ['gcc', 'armclang', 'llvm-arm']:
     LOCAL_CFLAGS += ' -std=c99'
 elif rtconfig.PLATFORM in ['armcc']:
     LOCAL_CFLAGS += ' --c99'

bsp/renesas/ra6m3-hmi-board/ra/SConscript

@@ -10,7 +10,7 @@ CPPPATH = []
 if rtconfig.PLATFORM in ['iccarm']:
     print("\nThe current project does not support IAR build\n")
     Return('group')
-elif rtconfig.PLATFORM in ['gcc', 'armclang']:
+elif rtconfig.PLATFORM in ['gcc', 'armclang', 'llvm-arm']:
     if GetOption('target') != 'mdk5':
         src += Glob(cwd + '/fsp/src/bsp/mcu/all/*.c')
         src += [cwd + '/fsp/src/bsp/cmsis/Device/RENESAS/Source/system.c']

bsp/renesas/ra6m3-hmi-board/ra/fsp/src/bsp/cmsis/Device/RENESAS/Source/startup.c

@@ -64,7 +64,12 @@ void Reset_Handler (void)
     SystemInit();
 
     /* Call user application. */
+#ifdef __ARMCC_VERSION
     main();
+#elif defined(__GNUC__)
+    extern int entry(void);
+    entry();
+#endif
 
     while (1)
     {

bsp/renesas/ra6m3-hmi-board/ra_cfg/SConscript

@@ -10,7 +10,7 @@ CPPPATH = []
 if rtconfig.PLATFORM in ['iccarm']:
     print("\nThe current project does not support IAR build\n")
     Return('group')
-elif rtconfig.PLATFORM in ['gcc', 'armclang']:
+elif rtconfig.PLATFORM in ['gcc', 'armclang', 'llvm-arm']:
     if GetOption('target') != 'mdk5':
         src = Glob('*.c')
         CPPPATH = [cwd+'/fsp_cfg', cwd + '/fsp_cfg/bsp']

bsp/renesas/ra6m3-hmi-board/ra_gen/SConscript

@@ -10,7 +10,7 @@ CPPPATH = []
 if rtconfig.PLATFORM in ['iccarm']:
     print("\nThe current project does not support IAR build\n")
     Return('group')
-elif rtconfig.PLATFORM in ['gcc', 'armclang']:
+elif rtconfig.PLATFORM in ['gcc', 'armclang', 'llvm-arm']:
     if GetOption('target') != 'mdk5':
         src = Glob('*.c')
         CPPPATH = [cwd, ]

bsp/renesas/ra6m3-hmi-board/rtconfig.py

@@ -4,7 +4,7 @@ import sys
 # toolchains options
 ARCH='arm'
 CPU='cortex-m4'
-CROSS_TOOL='keil'
+CROSS_TOOL='gcc'
 
 if os.getenv('RTT_CC'):
     CROSS_TOOL = os.getenv('RTT_CC')
@@ -22,6 +22,9 @@ elif CROSS_TOOL == 'keil':
 elif CROSS_TOOL == 'iar':
     PLATFORM    = 'iccarm'
     EXEC_PATH   = r'C:/Program Files/IAR Systems/Embedded Workbench 8.0'
+elif CROSS_TOOL == 'llvm-arm':
+    PLATFORM    = 'llvm-arm'
+    EXEC_PATH   = r'D:\Progrem\LLVMEmbeddedToolchainForArm-16.0.0-Windows-x86_64\bin'
 
 if os.getenv('RTT_EXEC_PATH'):
     EXEC_PATH = os.getenv('RTT_EXEC_PATH')
@@ -93,6 +96,37 @@ elif PLATFORM == 'armclang':
         CFLAGS += ' -Os'
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET \n'
+elif PLATFORM == 'llvm-arm':
+    # toolchains
+    PREFIX = 'llvm-'
+    CC = 'clang'
+    AS = 'clang'
+    AR = PREFIX + 'ar'
+    CXX = 'clang++'
+    LINK = 'clang'
+    TARGET_EXT = 'elf'
+    SIZE = PREFIX + 'size'
+    OBJDUMP = PREFIX + 'objdump'
+    OBJCPY = PREFIX + 'objcopy'
+    DEVICE = ' --config armv7em_hard_fpv4_sp_d16.cfg'
+    DEVICE += ' -ffunction-sections -fdata-sections'
+    CFLAGS = DEVICE
+    CFLAGS += ' -mfloat-abi=hard -march=armv7em -mfpu=fpv4-sp-d16'
+    AFLAGS = ' -c' + DEVICE + ' -Wa,-mimplicit-it=thumb ' ## -x assembler-with-cpp
+    LFLAGS = DEVICE + ' -Wl,--gc-sections,-Map=rt-thread.map,-u,Reset_Handler  -T script/fsp.ld -L script/'
+
+    CPATH = ''
+    LPATH = ''
+
+    if BUILD == 'debug':
+        CFLAGS += ' -O0 -gdwarf-2 -g'
+        AFLAGS += ' -gdwarf-2'
+    else:
+        CFLAGS += ' -O2'
+
+    CXXFLAGS = CFLAGS 
+
+    POST_ACTION = OBJCPY + ' -O ihex $TARGET rtthread.hex\n' + SIZE + ' $TARGET \n'
 
 def dist_handle(BSP_ROOT, dist_dir):
     import sys

bsp/renesas/ra6m3-hmi-board/script/fsp.ld

@@ -86,7 +86,7 @@ MEMORY
 }
 
 /* Library configurations */
-GROUP(libgcc.a libc.a libm.a libnosys.a)
+GROUP(libc.a libm.a)
 
 /* Linker script to place sections and symbol values. Should be used together
  * with other linker script that defines memory regions FLASH and RAM.