X-Git-Url: https://granicus.if.org/sourcecode?a=blobdiff_plain;f=gcc_compat.h;h=fe3f9048f7d099eaa63814b4c30501945685c217;hb=3fb78d7305cd5b38bbed2d91b328c3181207b4e9;hp=1f2c8354a065726ae27904ede6301a2f6d7d2d0c;hpb=f32126ba790dd4e61d43a2140b24f02426297bb6;p=strace

diff --git a/gcc_compat.h b/gcc_compat.h
index 1f2c8354..fe3f9048 100644
--- a/gcc_compat.h
+++ b/gcc_compat.h
@@ -25,8 +25,8 @@
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef GCC_COMPAT_H_
-#define GCC_COMPAT_H_
+#ifndef STRACE_GCC_COMPAT_H
+#define STRACE_GCC_COMPAT_H
 
 #if defined __GNUC__ && defined __GNUC_MINOR__
 # define GNUC_PREREQ(maj, min)	\
@@ -52,6 +52,16 @@
 # define ATTRIBUTE_PACKED	/* empty */
 #endif
 
+#if GNUC_PREREQ(3, 0)
+# define SAME_TYPE(x, y)	__builtin_types_compatible_p(typeof(x), typeof(y))
+# define FAIL_BUILD_ON_ZERO(expr) (sizeof(int[-1 + 2 * !!(expr)]) * 0)
+/* &(a)[0] is a pointer and not an array, shouldn't be treated as the same */
+# define MUST_BE_ARRAY(a) FAIL_BUILD_ON_ZERO(!SAME_TYPE((a), &(a)[0]))
+#else
+# define SAME_TYPE(x, y)	0
+# define MUST_BE_ARRAY(a)	0
+#endif
+
 #if GNUC_PREREQ(3, 0)
 # define ATTRIBUTE_MALLOC	__attribute__((__malloc__))
 #else
@@ -64,10 +74,22 @@
 # define ATTRIBUTE_NOINLINE	/* empty */
 #endif
 
+#if GNUC_PREREQ(4, 0)
+# define ATTRIBUTE_SENTINEL	__attribute__((__sentinel__))
+#else
+# define ATTRIBUTE_SENTINEL	/* empty */
+#endif
+
+#if GNUC_PREREQ(4, 1)
+# define ALIGNOF(t_)	__alignof__(t_)
+#else
+# define ALIGNOF(t_)	(sizeof(struct {char x_; t_ y_;}) - sizeof(t_))
+#endif
+
 #if GNUC_PREREQ(4, 3)
 # define ATTRIBUTE_ALLOC_SIZE(args)	__attribute__((__alloc_size__ args))
 #else
 # define ATTRIBUTE_ALLOC_SIZE(args)	/* empty */
 #endif
 
-#endif
+#endif /* !STRACE_GCC_COMPAT_H */