[PATCH 1/4] debug_uart: Replace debug functions with dummies if CONFIG_DEBUG_UART is not set

[Simon Glass]

On Tue, 27 Aug 2024 at 08:21, Lukasz Czechowski
<lukasz.czechowski at thaumatec.com> wrote:
>
> In case DEBUG UART is not used, define dummy macros replacing
> the actual function implementations that will not be available.
> This allows to compile code and avoid linker errors.
> Because the DEBUG_UART_FUNCS macro should not be used if
> DEBUG UART is not available, redefine it to generate compilation
> warning.
>
> Signed-off-by: Lukasz Czechowski <lukasz.czechowski at thaumatec.com>
> ---
>  include/debug_uart.h | 16 ++++++++++++++++
>  1 file changed, 16 insertions(+)

Reviewed-by: Simon Glass <sjg at chromium.org>


>
> diff --git a/include/debug_uart.h b/include/debug_uart.h
> index 714b369e6fe..dc0f1aa4c98 100644
> --- a/include/debug_uart.h
> +++ b/include/debug_uart.h
> @@ -128,6 +128,8 @@ void printdec(unsigned int value);
>                         (1 << CONFIG_DEBUG_UART_SHIFT), \
>                 CONFIG_DEBUG_UART_SHIFT)
>
> +#ifdef CONFIG_DEBUG_UART
> +
>  /*
>   * Now define some functions - this should be inserted into the serial driver
>   */
> @@ -197,4 +199,18 @@ void printdec(unsigned int value);
>                 _DEBUG_UART_ANNOUNCE \
>         } \
>
> +#else
> +
> +#define DEBUG_UART_FUNCS \
> +       #warning "DEBUG_UART not defined!"
> +
> +#define printch(ch) do{}while(0);
> +#define printascii(str) do{}while(0);
> +#define printhex2(value) do{}while(0);
> +#define printhex4(value) do{}while(0);
> +#define printhex8(value) do{}while(0);
> +#define printdec(value) do{}while(0);
> +
> +#endif
> +
>  #endif
> --
> 2.43.0
>