I've noticed something strange while using small printf for an STM32. If the string I want to print ends with a '\n' newline character everything is fine but otherwise the size of the hex file blows out.

e.g.

printf("xxx\n");

This leaves my hex size at 23.3KB

printf("xxx");

This leaves my hex size at 60.4KB

I assume this is because for some reason small printf can't handle it and substitutes the full printf function instead? Or have I done something stupid?

Here's the putchar stuff:

#ifdef __GNUC__
  /* With GCC/RAISONANCE, small printf (option LD Linker->Libraries->Small printf
     set to 'Yes') calls __io_putchar() */
  #define PUTCHAR_PROTOTYPE int __io_putchar(int ch)
#else
  #define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f)
#endif

PUTCHAR_PROTOTYPE
{
    /* Write a character to the USART */
    USART_SendData(USART2, (u8) ch);

    /* Loop until the end of transmission */
    while(USART_GetFlagStatus(USART2, USART_FLAG_TXE) == RESET)
    {
    }

    return ch;
}