These gcc extensions help the compiler optimize function calls,
but are unavailable if dss is not compiled with gcc.
This patch defines the corresponding macros to empty if __GNUC__
is not defined, or if the gcc version is too old to support the
particular function attribute.
+#define HAVE_GNUC(maj, min) \
+ defined(__GNUC__) && \
+ (__GNUC__ > maj || (__GNUC__ == maj && __GNUC_MINOR__ >= min))
+
+#if HAVE_GNUC(2,5)
# define __noreturn __attribute__ ((noreturn))
# define __noreturn __attribute__ ((noreturn))
+#else
+# define __noreturn
+#endif
+
+#if HAVE_GNUC(3,0)
# define __malloc __attribute__ ((malloc))
# define __malloc __attribute__ ((malloc))
+#else
+# define __malloc
+#endif
+
+#if HAVE_GNUC(2,7)
# define __a_unused __attribute__ ((unused))
# define __a_unused __attribute__ ((unused))
+#else
+# define __a_unused
+#endif
+
/*
* p is the number of the "format string" parameter, and q is
* the number of the first variadic parameter
*/
/*
* p is the number of the "format string" parameter, and q is
* the number of the first variadic parameter
*/
# define __printf(p,q) __attribute__ ((format (printf, p, q)))
# define __printf(p,q) __attribute__ ((format (printf, p, q)))
+#else
+# define __printf(p,q)
+#endif
+
/*
* as direct use of __printf(p,q) confuses doxygen, here are two extra macros
* for those values p,q that are actually used by paraslash.
/*
* as direct use of __printf(p,q) confuses doxygen, here are two extra macros
* for those values p,q that are actually used by paraslash.
#define __printf_1_2 __printf(1,2)
#define __printf_2_3 __printf(2,3)
#define __printf_1_2 __printf(1,2)
#define __printf_2_3 __printf(2,3)
-# if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ > 3)
# define __must_check __attribute__ ((warn_unused_result))
# define __must_check __attribute__ ((warn_unused_result))
# define __must_check /* no warn_unused_result */
# define __must_check /* no warn_unused_result */
#define _static_inline_ static inline
#define _static_inline_ static inline