linking trouble

[anonizmous]

доброго времени!
не подскажете в чем может быть причина ошибки:

[100%] Linking C executable z.elf
/usr/bin/cmake -E cmake_link_script CMakeFiles/z.elf.dir/link.txt --verbose=1
arm-none-eabi-gcc  -specs=nosys.specs -T/home/valik/t/z/STM32F103C8Tx_FLASH.ld -lc -lm -lnosys -Wl,--gc-sections -u _printf_float -Wl,--print-memory-usage -mcpu=cortex-m3 -mthumb    -O0 -Wall -fdata-sections -ffunction-sections -dM -fno-common -fshort-enums CMakeFiles/z.elf.dir/Src/gpio.c.o CMakeFiles/z.elf.dir/Src/main.c.o CMakeFiles/z.elf.dir/Src/stm32f1xx_hal_msp.c.o CMakeFiles/z.elf.dir/Src/stm32f1xx_it.c.o CMakeFiles/z.elf.dir/Src/syscalls.c.o CMakeFiles/z.elf.dir/Src/system_stm32f1xx.c.o CMakeFiles/z.elf.dir/Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_gpio_ex.c.o CMakeFiles/z.elf.dir/Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_tim.c.o CMakeFiles/z.elf.dir/Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_tim_ex.c.o CMakeFiles/z.elf.dir/Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal.c.o CMakeFiles/z.elf.dir/Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_rcc.c.o CMakeFiles/z.elf.dir/Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_rcc_ex.c.o CMakeFiles/z.elf.dir/Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_gpio.c.o CMakeFiles/z.elf.dir/Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_dma.c.o CMakeFiles/z.elf.dir/Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_cortex.c.o CMakeFiles/z.elf.dir/Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_pwr.c.o CMakeFiles/z.elf.dir/Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_flash.c.o CMakeFiles/z.elf.dir/Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_flash_ex.c.o CMakeFiles/z.elf.dir/Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_exti.c.o CMakeFiles/z.elf.dir/startup_stm32f103xb.s.o -o z.elf 
Memory region         Used Size  Region Size  %age Used
             RAM:        2688 B        20 KB     13.12%
           FLASH:        6640 B        64 KB     10.13%
/usr/lib/gcc/arm-none-eabi/9.3.0/../../../../arm-none-eabi/bin/ld: CMakeFiles/z.elf.dir/Src/syscalls.c.o: in function `_exit':
/home/valik/t/z/Src/syscalls.c:89: multiple definition of `_exit'; /usr/lib/gcc/arm-none-eabi/9.3.0/../../../../arm-none-eabi/lib/thumb/v7-m/nofp/libnosys.a(_exit.o):_exit.c:(.text._exit+0x0): first defined here
collect2: error: ld returned 1 exit status
make[2]: *** [CMakeFiles/z.elf.dir/build.make:381: z.elf] Ошибка 1
make[2]: выход из каталога «/home/valik/t/z/build»
make[1]: *** [CMakeFiles/Makefile2:96: CMakeFiles/z.elf.dir/all] Ошибка 2
make[1]: выход из каталога «/home/valik/t/z/build»
make: *** [Makefile:104: all] Ошибка 2
[valik@valik-nout build]$ 

спасибо!

[SL-RU]

Добрый вечер, из-за файла syscalls.c, в нём дублируются функции, объявленные в libnosys, которая уже подключена к проекту. Его нужно исключить из проекта удалив или добавив в CMakeIgnore.txt