uart: Make the uart module optional

Making the uart module optional makes an -Os compile much smaller.

1 files changed, 7 insertions, 1 deletions

diff --git a/uart.h b/uart.h
index 5ff2d79..b60b250 100644
--- a/uart.h
+++ b/uart.h
@@ -19,10 +19,16 @@
 #ifndef FMK_UART_H
 #define FMK_UART_H
 
+#ifdef WITH_UART
 void uart_setup(void);
 void uart_putchar(int c);
 void uart_printf(const char *fmt, ...);
 void uart_puts(const char *s);
-void uart0_isr(void);
+#else
+static inline void uart_setup(void) { }
+static inline void uart_putchar(int c) { (void)c; }
+static inline void uart_printf(const char *fmt, ...) { (void)fmt; }
+static inline void uart_puts(const char *s) { (void)s; }
+#endif
 
 #endif /* FMK_UART_H */