• What are the compile option differences between --specs=nosys.specs and --specs=rdimon.specs in arm-none-eabi-gcc?
    1. As title. and what time I need to add options ? I know add --specs=nano.specs thas is mean using newlib-nano when I use arm-none-eabi-gcc. In readme, rdimon is for semihosting. Nosys is for...
  • GCC+Keil printf cann't retarget to uart
    HI,I Want use gun in keil.now,Can't output debug log to uart.I have implement fputc like this: int fputc(int ch, FILE *f) { if (s_debugInit) { UART_SendData(DEBUG_UART, ch); } return ch; } but when...
  • RL-ARM v3.7 retarget problems
    Hi ! I wrote an application that use serial to get user cmds. I used the Blinky example to retarget fputc, ferror, _ttywrch, _sys_exit, and define getkey and sendchar functions. The problem is...
  • Static library links differently with gcc ld and armlink
    Hi, I've built a static library using arm-none-eabi-gcc and used the -fdata-sections, -ffunction-sections, and --gc-sections to reduce the library memory footprint. I've used that library successfully...
  • arm-...-gcc 8.3.1 VS 4.9.3
    Dears, I have been compiling with arm-none-eabi-gcc version 4.9.3 for a while; and everything were just fine with a Cortex-M0 I recently have tried using version 8.3.1 and things are not going as well...