ardupilot/libraries/AP_HAL/AP_HAL_Macros.h

#pragma once

/*
  macros to allow code to build on multiple platforms more easily
 */

#ifdef __GNUC__
 #define WARN_IF_UNUSED __attribute__ ((warn_unused_result))
#else
 #define WARN_IF_UNUSED
#endif

// use this to avoid issues between C++11 with NuttX and C++10 on
// other platforms.
#if !(defined(__GXX_EXPERIMENTAL_CXX0X__) || __cplusplus >= 201103L)
# define constexpr const
#endif

#define NORETURN __attribute__ ((noreturn))
AP_HAL: replace header guard with pragma once 2016-02-17 21:25:25 -04:00			`#pragma once`
AP_HAL: added AP_HAL_Macros.h this adds a define for constexpr, allowing code to build either with or without -std=gnu++0x 2013-01-15 18:12:55 -04:00
			`/*`
			`macros to allow code to build on multiple platforms more easily`
			`*/`

			`#ifdef __GNUC__`
			`#define WARN_IF_UNUSED __attribute__ ((warn_unused_result))`
			`#else`
			`#define WARN_IF_UNUSED`
			`#endif`

			`// use this to avoid issues between C++11 with NuttX and C++10 on`
			`// other platforms.`
			`#if !(defined(__GXX_EXPERIMENTAL_CXX0X__) \|\| __cplusplus >= 201103L)`
			`# define constexpr const`
			`#endif`

AP_HAL: use noreturn attribute on panic should reduce coverity warnings 2015-06-05 20:08:28 -03:00			`#define NORETURN __attribute__ ((noreturn))`