From 8a9bd9af9d3f2f55f666ef6c6c459ce96dda3b74 Mon Sep 17 00:00:00 2001
From: Gregory Nutt <gnutt@nuttx.org>
Date: Tue, 21 Jun 2016 15:08:09 -0600
Subject: [PATCH] SYSLOG: Some rather complex conditional compilation missed a
 case.

---
 drivers/syslog/syslog_channel.c | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/drivers/syslog/syslog_channel.c b/drivers/syslog/syslog_channel.c
index 2afee2a1ab..a36cb6e70f 100644
--- a/drivers/syslog/syslog_channel.c
+++ b/drivers/syslog/syslog_channel.c
@@ -57,7 +57,17 @@
  * Private Function Prototypes
  ****************************************************************************/
 
-#ifndef CONFIG_ARCH_LOWPUTC
+#if defined(CONFIG_SYSLOG_SERIAL_CONSOLE) && defined(CONFIG_ARCH_LOWPUTC)
+#  define HAVE_LOWPUTC
+#elif !defined(CONFIG_RAMLOG_SYSLOG)
+#  define NEED_LOWPUTC
+#endif
+
+/****************************************************************************
+ * Private Function Prototypes
+ ****************************************************************************/
+
+#ifdef NEED_LOWPUTC
 static int syslog_default_putc(int ch);
 #endif
 static int syslog_default_flush(void);
@@ -73,7 +83,7 @@ const struct syslog_channel_s g_default_channel =
   ramlog_putc,
   syslog_default_flush
 };
-#elif defined(CONFIG_SYSLOG_SERIAL_CONSOLE) && defined(CONFIG_ARCH_LOWPUTC)
+#elif defined(HAVE_LOWPUTC)
 const struct syslog_channel_s g_default_channel =
 {
   up_putc,
@@ -105,7 +115,7 @@ FAR const struct syslog_channel_s *g_syslog_channel = &g_default_channel;
  *
  ****************************************************************************/
 
-#ifndef CONFIG_ARCH_LOWPUTC
+#ifdef NEED_LOWPUTC
 static int syslog_default_putc(int ch)
 {
   return ch;