The printf() implementation needs 4~5KB of storage space which may not be available when building an SPL for SoCs with scarce internal RAM (8KB or less). This patch adds a new option, CONFIG_SPL_PRINTF_SUPPORT, to deal with this.
Signed-off-by: José Miguel Gonçalves jose.goncalves@inov.pt --- Changes for v3: - new patch --- README | 3 +++ include/common.h | 11 +++++++++++ 2 files changed, 14 insertions(+)
diff --git a/README b/README index 016d8bc..988812c 100644 --- a/README +++ b/README @@ -2576,6 +2576,9 @@ FIT uImage format: CONFIG_SPL_LIBCOMMON_SUPPORT Support for common/libcommon.o in SPL binary
+ CONFIG_SPL_PRINTF_SUPPORT + Enable printf() support in common/libcommon.o + CONFIG_SPL_LIBDISK_SUPPORT Support for disk/libdisk.o in SPL binary
diff --git a/include/common.h b/include/common.h index 55025c0..c10d745 100644 --- a/include/common.h +++ b/include/common.h @@ -805,9 +805,20 @@ int tstc(void); /* stdout */ void putc(const char c); void puts(const char *s); +/* + * The printf() implementation needs 4~5KB of storage space which may not be + * available when building an SPL for SoCs with scarce internal RAM + * (8KB or less). To force printf() inclusion on an SPL we must define + * CONFIG_SPL_LIBCOMMON_SUPPORT and CONFIG_SPL_PRINTF_SUPPORT. + */ +#if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_PRINTF_SUPPORT) int printf(const char *fmt, ...) __attribute__ ((format (__printf__, 1, 2))); int vprintf(const char *fmt, va_list args); +#else +#define printf(fmt...) do {} while (0) +#define vprintf(fmt, args) do {} while (0) +#endif
/* stderr */ #define eputc(c) fputc(stderr, c)