Linux to posix conversion

Changed "linux" target to "posix". Most of the changes are shared with
QuRT and with OSX. The Linux specific parts are in for i2c which uses
<linux/i2c.h> and <linux/i2c-dev.h>.

There is also a check for __PX4_LINUX in mavlink for a tty ioctl that is
not supported.

Signed-off-by: Mark Charlebois <charlebm@gmail.com>

src/modules/commander/module.mk

@@ -52,7 +52,7 @@ ifdef ($(PX4_TARGET_OS),nuttx)
 SRCS += 
 			state_machine_helper.cpp 
 else
-SRCS +=			state_machine_helper_linux.cpp 
+SRCS +=			state_machine_helper_posix.cpp 
 endif
 
 MODULE_STACKSIZE = 5000

src/modules/mavlink/mavlink_main.h

@@ -35,5 +35,5 @@
 #ifdef __PX4_NUTTX
 #include "mavlink_main_nuttx.h"
 #else
-#include "mavlink_main_linux.h"
+#include "mavlink_main_posix.h"
 #endif

src/modules/mavlink/mavlink_main_posix.h

@@ -32,7 +32,7 @@
  ****************************************************************************/
 
 /**
- * @file mavlink_main_linux.h
+ * @file mavlink_main_posix.h
  * MAVLink 1.0 protocol interface definition.
  *
  * @author Lorenz Meier <lm@inf.ethz.ch>

src/modules/mavlink/mavlink_receiver_nuttx.cpp

@@ -41,7 +41,7 @@
  */
 
 /* XXX trim includes */
-#include <px4_config.h>
+#include <nuttx/config.h>
 #include <unistd.h>
 #include <pthread.h>
 #include <stdio.h>

src/modules/mavlink/mavlink_tests/module.mk

@@ -42,7 +42,7 @@ SRCS			= mavlink_tests.cpp \
 ifeq ($(PX4_TARGET_NUTTX),nuttx)
 SRCS += 		../mavlink_ftp_nuttx.cpp 
 else
-SRCS += 		../mavlink_ftp_linux.cpp 
+SRCS += 		../mavlink_ftp_posix.cpp 
 endif
 
 INCLUDE_DIRS	 += $(MAVLINK_SRC)/include/mavlink

src/modules/mavlink/module.mk

@@ -41,9 +41,9 @@ SRCS		 += 	mavlink_main_nuttx.cpp \
 			mavlink_ftp_nuttx.cpp \
 			mavlink_receiver_nuttx.cpp 
 else
-SRCS		 += 	mavlink_main_linux.cpp \
-			mavlink_ftp_linux.cpp \
-			mavlink_receiver_linux.cpp 
+SRCS		 += 	mavlink_main_posix.cpp \
+			mavlink_ftp_posix.cpp \
+			mavlink_receiver_posix.cpp 
 endif
 
 SRCS 		 +=	mavlink.c \

src/modules/sensors/module.mk

@@ -41,7 +41,7 @@ MODULE_PRIORITY	= "SCHED_PRIORITY_MAX-5"
 ifeq ($(PX$_TARGET_OS),nuttx)
 SRCS		= sensors_nuttx.cpp 
 else
-SRCS		= sensors_linux.cpp 
+SRCS		= sensors_posix.cpp 
 endif
 SRCS +=		  sensor_params.c
 

src/modules/sensors/sensors_nuttx.cpp

@@ -46,7 +46,7 @@
  * @author Anton Babushkin <anton@px4.io>
  */
 
-#include <px4_config.h>
+#include <nuttx/config.h>
 
 #include <fcntl.h>
 #include <poll.h>

src/modules/systemlib/param/param.h

@@ -396,7 +396,7 @@ struct param_info_s {
 // See https://llvm.org/bugs/show_bug.cgi?format=multiple&id=18006
 // The following hack is for GCC >=4.8 only. Clang works fine without
 // this.
-#ifdef __PX4_LINUX
+#ifdef __PX4_POSIX
 				__attribute__((aligned(16)));
 #else
 				;