scons make 编译失败，求原因

发布于 2021-09-16 08:04:44 浏览：1422 订阅该版

请教大家出错的原因， 而且为什么make 和scons编译结果不一样呢？
步骤
1. scons --target=makefile
![image.png](https://oss-club.rt-thread.org/uploads/20210916/318c1157218285b75366ab08a40ba463.png)

2 make 
![image.png](https://oss-club.rt-thread.org/uploads/20210916/c25b654a209c647a022bdfc91b428b0c.png)

使用scons 编译
3 ![image.png](https://oss-club.rt-thread.org/uploads/20210916/cff7a6fe0fe99f3d6e83b4bdae8d7fb2.png)

rtconfig.py 
```python
import os
ARCH     = 'risc-v'
CPU      = 'bumblebee'
CROSS_TOOL  = 'gcc'

if os.getenv('RTT_CC'):
    CROSS_TOOL = os.getenv('RTT_CC')

if  CROSS_TOOL == 'gcc':
    PLATFORM    = 'gcc'
    EXEC_PATH   = r'E:/DevBoard/ARTT/rt-studio/RT-ThreadStudio/repo/Extract/ToolChain_Support_Packages/WCH/RISC-V-GCC-WCH/8.2.0/bin'
    #EXEC_PATH   = r'/opt/unknown-gcc/bin'
else:
    print('Please make sure your toolchains is GNU GCC!')
    exit(0)

if os.getenv('RTT_EXEC_PATH'):
    EXEC_PATH = os.getenv('RTT_EXEC_PATH')

BUILD = 'debug'

CORE = 'risc-v'
MAP_FILE = 'rtthread.map'
LINK_FILE = './linkscripts/link.lds'
TARGET_NAME = 'rtthread.hex'

if PLATFORM == 'gcc':
   
    PREFIX = 'riscv-none-embed-'
    CC = PREFIX + 'gcc'
    CXX= PREFIX + 'g++'
    AS = PREFIX + 'gcc'
    AR = PREFIX + 'ar'
    LINK = PREFIX + 'gcc'
    TARGET_EXT = 'elf'
    SIZE = PREFIX + 'size'
    OBJDUMP = PREFIX + 'objdump'
    OBJCPY = PREFIX + 'objcopy'

DEVICE = ' -march=rv32imac -mabi=ilp32 -DUSE_PLIC -DUSE_M_TIME -DNO_INIT -mcmodel=medany -msmall-data-limit=8 -L.  -nostartfiles  -lc '
    CFLAGS = DEVICE
    CFLAGS += ' -save-temps=obj'
    AFLAGS = '-c'+ DEVICE + ' -x assembler-with-cpp'
    AFLAGS += ' -IIlibraries/Core -Ilibraries/WCH32V103_std_peripheral -Ilibraries/WCH32V103_std_peripheral/inc'
    LFLAGS = DEVICE
    LFLAGS += ' -Wl,--gc-sections,-cref,-Map=' + MAP_FILE
    LFLAGS += ' -T ' + LINK_FILE
    LFLAGS += ' -Wl,-wrap=memset'

CPATH = ''
    LPATH = ''

if BUILD == 'debug':
        CFLAGS += ' -O0 -g3'
        AFLAGS += ' -g3'
    else:
        CFLAGS += ' -O2'

POST_ACTION = OBJCPY + ' -O binary $TARGET ' + TARGET_NAME + '\n'
    POST_ACTION += SIZE + ' $TARGET\n'
```

link.lds
```c
ENTRY( _start )

__stack_size = 2048;

PROVIDE( _stack_size = __stack_size );

MEMORY
{
	FLASH (rx) : ORIGIN = 0x00000000, LENGTH = 64K
	RAM (xrw) : ORIGIN = 0x20000000, LENGTH = 20K
}

SECTIONS
{

.init :
	{
		_sinit = .;
		. = ALIGN(4);
		KEEP(*(SORT_NONE(.init)))
		. = ALIGN(4);
		_einit = .;
	} >FLASH AT>FLASH

.vector :
  {
      *(.vector);
	  . = ALIGN(64);
  } >FLASH AT>FLASH

.text :
	{
		. = ALIGN(4);
		*(.text)
		*(.text.*)
		*(.rodata)
		*(.rodata*)
		*(.glue_7)
		*(.glue_7t)
		*(.gnu.linkonce.t.*)
		
		 /* section information for finsh shell */
    . = ALIGN(4);
    __fsymtab_start = .;
    KEEP(*(FSymTab))
    __fsymtab_end = .;
    . = ALIGN(4);
    __vsymtab_start = .;
    KEEP(*(VSymTab))
    __vsymtab_end = .;
    . = ALIGN(4);
    
    /* section information for initial. */
    . = ALIGN(4);
    __rt_init_start = .;
    KEEP(*(SORT(.rti_fn*)))
    __rt_init_end = .;
    . = ALIGN(4);

/* section information for modules */
    . = ALIGN(4);
    __rtmsymtab_start = .;
    KEEP(*(RTMSymTab))
    __rtmsymtab_end = .;
		. = ALIGN(4);
			
	} >FLASH AT>FLASH

.fini :
	{
		KEEP(*(SORT_NONE(.fini)))
		. = ALIGN(4);
	} >FLASH AT>FLASH

PROVIDE( _etext = . );
	PROVIDE( _eitcm = . );

.preinit_array  :
	{
	  PROVIDE_HIDDEN (__preinit_array_start = .);
	  KEEP (*(.preinit_array))
	  PROVIDE_HIDDEN (__preinit_array_end = .);
	} >FLASH AT>FLASH 
	
	.init_array     :
	{
	  PROVIDE_HIDDEN (__init_array_start = .);
	  KEEP (*(SORT_BY_INIT_PRIORITY(.init_array.*) SORT_BY_INIT_PRIORITY(.ctors.*)))
	  KEEP (*(.init_array EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o ) .ctors))
	  PROVIDE_HIDDEN (__init_array_end = .);
	} >FLASH AT>FLASH 
	
	.fini_array     :
	{
	  PROVIDE_HIDDEN (__fini_array_start = .);
	  KEEP (*(SORT_BY_INIT_PRIORITY(.fini_array.*) SORT_BY_INIT_PRIORITY(.dtors.*)))
	  KEEP (*(.fini_array EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o ) .dtors))
	  PROVIDE_HIDDEN (__fini_array_end = .);
	} >FLASH AT>FLASH 
	
	.ctors          :
	{
	  /* gcc uses crtbegin.o to find the start of
	     the constructors, so we make sure it is
	     first.  Because this is a wildcard, it
	     doesn't matter if the user does not
	     actually link against crtbegin.o; the
	     linker won't look for a file to match a
	     wildcard.  The wildcard also means that it
	     doesn't matter which directory crtbegin.o
	     is in.  */
	  KEEP (*crtbegin.o(.ctors))
	  KEEP (*crtbegin?.o(.ctors))
	  /* We don't want to include the .ctor section from
	     the crtend.o file until after the sorted ctors.
	     The .ctor section from the crtend file contains the
	     end of ctors marker and it must be last */
	  KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .ctors))
	  KEEP (*(SORT(.ctors.*)))
	  KEEP (*(.ctors))
	} >FLASH AT>FLASH 
	
	.dtors          :
	{
	  KEEP (*crtbegin.o(.dtors))
	  KEEP (*crtbegin?.o(.dtors))
	  KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .dtors))
	  KEEP (*(SORT(.dtors.*)))
	  KEEP (*(.dtors))
	} >FLASH AT>FLASH

.dalign :
	{
		. = ALIGN(4);
		PROVIDE(_data_vma = .);
	} >RAM AT>FLASH

.dlalign :
	{
		. = ALIGN(4); 
		PROVIDE(_data_lma = .);
	} >FLASH AT>FLASH

.data :
	{
    	*(.gnu.linkonce.r.*)
    	*(.data .data.*)
    	*(.gnu.linkonce.d.*)
		. = ALIGN(8);
    	PROVIDE( __global_pointer$ = . + 0x800 );
    	*(.sdata .sdata.*)
		*(.sdata2.*)
    	*(.gnu.linkonce.s.*)
    	. = ALIGN(8);
    	*(.srodata.cst16)
    	*(.srodata.cst8)
    	*(.srodata.cst4)
    	*(.srodata.cst2)
    	*(.srodata .srodata.*)
    	. = ALIGN(4);
		PROVIDE( _edata = .);
	} >RAM AT>FLASH

.bss :
	{
		. = ALIGN(4);
		PROVIDE( _sbss = .);
  	    *(.sbss*)
        *(.gnu.linkonce.sb.*)
		*(.bss*)
     	*(.gnu.linkonce.b.*)		
		*(COMMON*)
		. = ALIGN(4);
		PROVIDE( _ebss = .);
	} >RAM AT>FLASH

PROVIDE( _end = _ebss);
	PROVIDE( end = . );

.stack ORIGIN(RAM) + LENGTH(RAM) - __stack_size :
    {
        . = ALIGN(4);
        PROVIDE(_susrstack = . );
        . = . + __stack_size;
        PROVIDE( _eusrstack = .);
    } >RAM

}
```

李肯陪你玩赚嵌入式 认证专家 2021-09-16

2022年度和2023年度RT-Thread社区优秀开源布道师，COC深圳城市开发者社区主理人，专注于嵌入式物联网的架构设计

xianting77 2021-09-16

Whatever brings you down, will eventlly make you stronger!

李肯陪你玩赚嵌入式 2021-09-16

2022年度和2023年度RT-Thread社区优秀开源布道师，COC深圳城市开发者社区主理人，专注于嵌入式物联网的架构设计

在使用scons编译时，加上参数
scons --verbose
一般到最后链接那一步就可以看到当前你链接哪里库，-lxxx 后面就是你的库名字；
以下是一个参考：
```
arm-none-eabi-g++ -o rtthread.elf -march=armv7-a -marm -msoft-float -nostartfiles -Wl,--gc-sections,-Map=rtthread.map,-cref,-u,system_vectors -T link.lds build/drivers/drv_sdio.o build/drivers/board.o build/drivers/drv_keyboard.o build/drivers/drv_timer.o build/drivers/drv_smc911x.o build/drivers/serial.o build/drivers/drv_mouse.o build/drivers/secondary_cpu.o build/applications/lcd_init.o build/applications/main.o build/applications/mnt.o build/kernel/src/memheap.o build/kernel/src/irq.o build/kernel/src/mem.o build/kernel/src/scheduler.o build/kernel/src/clock.o build/kernel/src/mempool.o build/kernel/src/object.o build/kernel/src/timer.o build/kernel/src/thread.o build/kernel/src/ipc.o build/kernel/src/device.o build/kernel/src/signal.o build/kernel/src/idle.o build/kernel/src/cpu.o build/kernel/src/kservice.o build/kernel/src/components.o build/kernel/libcpu/arm/common/backtrace.o build/kernel/libcpu/arm/common/showmem.o build/kernel/libcpu/arm/common/div0.o build/kernel/libcpu/arm/cortex-a/stack.o build/kernel/libcpu/arm/cortex-a/context_gcc.o build/kernel/libcpu/arm/cortex-a/cpu.o build/kernel/libcpu/arm/cortex-a/cache.o build/kernel/libcpu/arm/cortex-a/start_gcc.o build/kernel/libcpu/arm/cortex-a/cp15_gcc.o build/kernel/libcpu/arm/cortex-a/mmu.o build/kernel/libcpu/arm/cortex-a/trap.o build/kernel/libcpu/arm/cortex-a/gic.o build/kernel/libcpu/arm/cortex-a/interrupt.o build/kernel/libcpu/arm/cortex-a/vector_gcc.o build/kernel/components/cplusplus/cxx_Thread.o build/kernel/components/cplusplus/cxx_Semaphore.o build/kernel/components/cplusplus/cxx_crt.o build/kernel/components/cplusplus/cxx_Mutex.o build/kernel/components/cplusplus/crt_init.o build/kernel/components/net/sal_socket/dfs_net/dfs_net.o build/kernel/components/net/sal_socket/socket/net_sockets.o build/kernel/components/net/sal_socket/src/sal_socket.o build/kernel/components/net/sal_socket/socket/net_netdb.o build/kernel/components/net/sal_socket/impl/af_inet_lwip.o build/kernel/components/net/netdev/src/netdev_ipaddr.o build/kernel/components/net/netdev/src/netdev.o build/kernel/components/net/lwip-2.1.2/src/core/timeouts.o build/kernel/components/net/lwip-2.1.2/src/core/ipv4/ip4.o build/kernel/components/net/lwip-2.1.2/src/core/sys.o build/kernel/components/net/lwip-2.1.2/src/netif/lowpan6.o build/kernel/components/net/lwip-2.1.2/src/core/altcp_alloc.o build/kernel/components/net/lwip-2.1.2/src/core/udp.o build/kernel/components/net/lwip-2.1.2/src/api/sockets.o build/kernel/components/net/lwip-2.1.2/src/core/tcp_in.o build/kernel/components/net/lwip-2.1.2/src/core/raw.o build/kernel/components/net/lwip-2.1.2/src/core/netif.o build/kernel/components/net/lwip-2.1.2/src/api/api_lib.o build/kernel/components/net/lwip-2.1.2/src/core/ipv4/etharp.o build/kernel/components/net/lwip-2.1.2/src/core/pbuf.o build/kernel/components/net/lwip-2.1.2/src/core/ipv4/dhcp.o build/kernel/components/net/lwip-2.1.2/src/apps/ping/ping.o build/kernel/components/net/lwip-2.1.2/src/netif/ethernet.o build/kernel/components/net/lwip-2.1.2/src/core/dns.o build/kernel/components/net/lwip-2.1.2/src/api/netbuf.o build/kernel/components/net/lwip-2.1.2/src/core/stats.o build/kernel/components/net/lwip-2.1.2/src/api/if_api.o build/kernel/components/net/lwip-2.1.2/src/core/ipv4/autoip.o build/kernel/components/net/lwip-2.1.2/src/api/netifapi.o build/kernel/components/net/lwip-2.1.2/src/api/api_msg.o build/kernel/components/net/lwip-2.1.2/src/arch/sys_arch.o build/kernel/components/net/lwip-2.1.2/src/core/ipv4/ip4_frag.o build/kernel/components/net/lwip-2.1.2/src/core/tcp_out.o build/kernel/components/net/lwip-2.1.2/src/core/ipv4/igmp.o build/kernel/components/net/lwip-2.1.2/src/core/def.o build/kernel/components/net/lwip-2.1.2/src/core/ipv4/ip4_addr.o build/kernel/components/net/lwip-2.1.2/src/core/ip.o build/kernel/components/net/lwip-2.1.2/src/api/tcpip.o build/kernel/components/net/lwip-2.1.2/src/core/inet_chksum.o build/kernel/components/net/lwip-2.1.2/src/core/init.o build/kernel/components/net/lwip-2.1.2/src/api/err.o build/kernel/components/net/lwip-2.1.2/src/core/tcp.o build/kernel/components/net/lwip-2.1.2/src/core/altcp_tcp.o build/kernel/components/net/lwip-2.1.2/src/core/memp.o build/kernel/components/net/lwip-2.1.2/src/api/netdb.o build/kernel/components/net/lwip-2.1.2/src/core/altcp.o build/kernel/components/net/lwip-2.1.2/src/netif/ethernetif.o build/kernel/components/net/lwip-2.1.2/src/core/ipv4/icmp.o build/kernel/components/libc/compilers/common/time.o build/kernel/components/libc/compilers/common/stdlib.o build/kernel/components/libc/compilers/common/unistd.o build/kernel/components/libc/compilers/common/delay.o build/kernel/components/libc/compilers/newlib/syscalls.o build/kernel/components/libc/compilers/newlib/stdio.o build/kernel/components/libc/compilers/newlib/libc.o build/kernel/components/libc/pthreads/semaphore.o build/kernel/components/libc/pthreads/pthread.o build/kernel/components/libc/pthreads/pthread_spin.o build/kernel/components/libc/pthreads/pthread_tls.o build/kernel/components/libc/pthreads/mqueue.o build/kernel/components/libc/pthreads/pthread_cond.o build/kernel/components/libc/pthreads/pthread_attr.o build/kernel/components/libc/pthreads/sched.o build/kernel/components/libc/pthreads/pthread_barrier.o build/kernel/components/libc/pthreads/pthread_rwlock.o build/kernel/components/libc/pthreads/pthread_mutex.o build/kernel/components/libc/signal/posix_signal.o build/kernel/components/libc/termios/posix_termios.o build/kernel/components/libc/aio/posix_aio.o build/kernel/components/libc/getline/posix_getline.o build/kernel/components/libc/mmap/posix_mmap.o build/kernel/components/lwp/lwp.o build/kernel/components/lwp/lwp_mem.o build/kernel/components/lwp/arch/arm/cortex-a/lwp_gcc.o build/kernel/components/lwp/lwp_memheap.o build/kernel/components/lwp/lwp_syscall.o build/kernel/components/dfs/src/dfs_posix.o build/kernel/components/dfs/src/dfs.o build/kernel/components/dfs/src/dfs_file.o build/kernel/components/dfs/src/dfs_fs.o build/kernel/components/dfs/src/poll.o build/kernel/components/dfs/src/select.o build/kernel/components/dfs/filesystems/devfs/devfs.o build/kernel/components/dfs/filesystems/elmfat/ff.o build/kernel/components/dfs/filesystems/elmfat/dfs_elm.o build/kernel/components/dfs/filesystems/elmfat/ffunicode.o build/kernel/components/dfs/filesystems/ramfs/dfs_ramfs.o build/kernel/components/dfs/filesystems/romfs/romfs.o build/kernel/components/dfs/filesystems/romfs/dfs_romfs.o build/kernel/components/finsh/msh_file.o build/kernel/components/finsh/msh.o build/kernel/components/finsh/shell.o build/kernel/components/drivers/mtd/mtd_nand.o build/kernel/components/drivers/mtd/mtd_nor.o build/kernel/components/drivers/src/ringblk_buf.o build/kernel/components/drivers/src/dataqueue.o build/kernel/components/drivers/src/ringbuffer.o build/kernel/components/drivers/src/pipe.o build/kernel/components/drivers/src/workqueue.o build/kernel/components/drivers/src/completion.o build/kernel/components/drivers/src/waitqueue.o build/kernel/components/drivers/serial/serial.o build/kernel/components/drivers/watchdog/watchdog.o build/kernel/components/drivers/i2c/i2c-bit-ops.o build/kernel/components/drivers/i2c/i2c_core.o build/kernel/components/drivers/i2c/i2c_dev.o build/kernel/components/drivers/sdio/sdio.o build/kernel/components/drivers/sdio/block_dev.o build/kernel/components/drivers/sdio/mmc.o build/kernel/components/drivers/sdio/sd.o build/kernel/components/drivers/sdio/mmcsd_core.o build/kernel/components/drivers/spi/sfud/src/sfud.o build/kernel/components/drivers/spi/spi_dev.o build/kernel/components/drivers/spi/spi_core.o build/kernel/components/drivers/spi/spi_flash_sfud.o build/kernel/components/drivers/spi/spi_msd.o build/kernel/components/drivers/spi/sfud/src/sfud_sfdp.o build/kernel/components/drivers/misc/pin.o build/kernel/components/drivers/rtc/soft_rtc.o build/kernel/components/drivers/rtc/rtc.o **-lc -lm**
arm-none-eabi-objcopy -O binary rtthread.elf rtthread.bin
arm-none-eabi-size rtthread.elf
   text    data     bss     dec     hex filename
 569052    2084   85588  656724   a0554 rtthread.elf
scons: done building targets.
```
比如这个例子，它最后一步就是链接了c库和m库（数学库），
你可以看下你的链接了哪些库。