py/mpconfig: Provide config option for internal printf printer.

The C-level printf is usually used for internal debugging prints, and a
port/board may want to redirect this somewhere other than stdout.

Signed-off-by: Damien George <damien@micropython.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/shared/libc/printf.c b/shared/libc/printf.c
index e8db2b999..6b5373188 100644
--- a/shared/libc/printf.c
+++ b/shared/libc/printf.c
@@ -60,13 +60,13 @@ int snprintf(char *str, size_t size, const char *fmt, ...);
 int printf(const char *fmt, ...) {
     va_list ap;
     va_start(ap, fmt);
-    int ret = mp_vprintf(&mp_plat_print, fmt, ap);
+    int ret = mp_vprintf(MICROPY_INTERNAL_PRINTF_PRINTER, fmt, ap);
     va_end(ap);
     return ret;
 }
 
 int vprintf(const char *fmt, va_list ap) {
-    return mp_vprintf(&mp_plat_print, fmt, ap);
+    return mp_vprintf(MICROPY_INTERNAL_PRINTF_PRINTER, fmt, ap);
 }
 
 // need this because gcc optimises printf("%c", c) -> putchar(c), and printf("a") -> putchar('a')