From 5cea279a85e16d20247d911b060b6aff8186003a Mon Sep 17 00:00:00 2001
From: Martin Ling <martin-git@earth.li>
Date: Fri, 3 Jan 2014 13:38:06 +0100
Subject: [PATCH] linux: Speed fields may not be present in kernel termios
 structures.

---
 configure.ac    |  4 ++++
 linux_termios.c |  6 ++----
 serialport.c    | 17 ++++++++++++-----
 3 files changed, 18 insertions(+), 9 deletions(-)

diff --git a/configure.ac b/configure.ac
index 961031d..6ceb02a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -107,6 +107,10 @@ AC_TYPE_SIZE_T
 # Check for specific termios structures.
 AC_CHECK_TYPE([struct termios2], [AC_DEFINE(HAVE_TERMIOS2, 1)], [], [[#include <linux/termios.h>]])
 AC_CHECK_TYPE([struct termiox], [AC_DEFINE(HAVE_TERMIOX, 1)], [], [[#include <linux/termios.h>]])
+AC_CHECK_MEMBERS([struct termios.c_ispeed, struct termios.c_ospeed],
+	[AC_DEFINE(HAVE_TERMIOS_SPEED, 1)], [], [[#include <linux/termios.h>]])
+AC_CHECK_MEMBERS([struct termios2.c_ispeed, struct termios2.c_ospeed],
+	[AC_DEFINE(HAVE_TERMIOS2_SPEED, 1)], [], [[#include <linux/termios.h>]])
 
 AC_SUBST(MAKEFLAGS, '--no-print-directory')
 AC_SUBST(AM_LIBTOOLFLAGS, '--silent')
diff --git a/linux_termios.c b/linux_termios.c
index b236869..d45f801 100644
--- a/linux_termios.c
+++ b/linux_termios.c
@@ -33,8 +33,6 @@
  * TCSETX/TCGETX ioctls used with struct termiox, others do not.
  */
 
-#if defined(__linux__) && !defined(__ANDROID__)
-
 #include <linux/termios.h>
 #include "linux_termios.h"
 
@@ -65,6 +63,7 @@ int get_termios_size(void)
 #endif
 }
 
+#ifdef USE_TERMIOS_SPEED
 int get_termios_speed(void *data)
 {
 #ifdef HAVE_TERMIOS2
@@ -89,6 +88,7 @@ void set_termios_speed(void *data, int speed)
 	term->c_cflag |= BOTHER;
 	term->c_ispeed = term->c_ospeed = speed;
 }
+#endif
 
 #ifdef HAVE_TERMIOX
 int get_termiox_size(void)
@@ -125,5 +125,3 @@ void set_termiox_flow(void *data, int rts, int cts, int dtr, int dsr)
 		termx->x_cflag |= DSRXON;
 }
 #endif
-
-#endif
diff --git a/serialport.c b/serialport.c
index 0823180..12cb529 100644
--- a/serialport.c
+++ b/serialport.c
@@ -70,6 +70,11 @@
 #define TIOCOUTQ FIONWRITE
 #endif
 
+/* Non-standard baudrates are not available everywhere. */
+#if defined(HAVE_TERMIOS_SPEED) || defined(HAVE_TERMIOS2_SPEED)
+#define USE_TERMIOS_SPEED
+#endif
+
 #include "libserialport.h"
 
 struct sp_port {
@@ -1458,7 +1463,7 @@ enum sp_return sp_wait(struct sp_event_set *event_set, unsigned int timeout)
 #endif
 }
 
-#ifdef __linux__
+#ifdef USE_TERMIOS_SPEED
 static enum sp_return get_baudrate(int fd, int *baudrate)
 {
 	void *data;
@@ -1511,6 +1516,7 @@ static enum sp_return set_baudrate(int fd, int baudrate)
 
 	RETURN_OK();
 }
+#endif /* USE_TERMIOS_SPEED */
 
 #ifdef USE_TERMIOX
 static enum sp_return get_flow(int fd, struct port_data *data)
@@ -1568,7 +1574,6 @@ static enum sp_return set_flow(int fd, struct port_data *data)
 	RETURN_OK();
 }
 #endif /* USE_TERMIOX */
-#endif /* __linux__ */
 
 static enum sp_return get_config(struct sp_port *port, struct port_data *data,
 	struct sp_port_config *config)
@@ -1705,7 +1710,7 @@ static enum sp_return get_config(struct sp_port *port, struct port_data *data,
 	if (i == NUM_STD_BAUDRATES) {
 #ifdef __APPLE__
 		config->baudrate = (int)data->term.c_ispeed;
-#elif defined(__linux__)
+#elif defined(USE_TERMIOS_SPEED)
 		TRY(get_baudrate(port->fd, &config->baudrate));
 #else
 		config->baudrate = -1;
@@ -1788,7 +1793,7 @@ static enum sp_return set_config(struct sp_port *port, struct port_data *data,
 
 	baud_nonstd = B0;
 #endif
-#ifdef __linux__
+#ifdef USE_TERMIOS_SPEED
 	int baud_nonstd = 0;
 #endif
 
@@ -1955,7 +1960,7 @@ static enum sp_return set_config(struct sp_port *port, struct port_data *data,
 			if (cfsetspeed(&data->term, B9600) < 0)
 				RETURN_FAIL("cfsetspeed() failed");
 			baud_nonstd = config->baudrate;
-#elif defined(__linux__)
+#elif defined(USE_TERMIOS_SPEED)
 			baud_nonstd = 1;
 #else
 			RETURN_ERROR(SP_ERR_SUPP, "Non-standard baudrate not supported");
@@ -2151,8 +2156,10 @@ static enum sp_return set_config(struct sp_port *port, struct port_data *data,
 			RETURN_FAIL("cfsetspeed() failed");
 	}
 #elif defined(__linux__)
+#ifdef USE_TERMIOS_SPEED
 	if (baud_nonstd)
 		TRY(set_baudrate(port->fd, config->baudrate));
+#endif
 #ifdef USE_TERMIOX
 	if (data->termiox_supported)
 		TRY(set_flow(port->fd, data));