And second one what I’ve found:
c:/sysgcc/arm-eabi/bin/../lib/gcc/arm-none-eabi/10.3.1/../../../../arm-none-eabi/bin/ld.exe: c:/sysgcc/arm-eabi/bin/../lib/gcc/arm-none-eabi/10.3.1/../../../../arm-none-eabi/lib/thumb/v7e-m+fp/hard\libc_nano.a(lib_a-reent.o):(.bss.errno+0x0): multiple definition of `errno’; Debug/sys_arch.o:C:\Users\***\source\repos\VGDBtest1/../../../STM32CubeIDE/workspace_1.8.0/LCDtest/Middlewares/Third_Party/LwIP/system/OS/sys_arch.c:45: first defined here