Define macros in a special way if gcc is not used and so dev_t is an

array.

1 files changed, 13 insertions, 4 deletions

diff --git a/sysdeps/unix/sysv/linux/sys/sysmacros.h b/sysdeps/unix/sysv/linux/sys/sysmacros.h
index 85b1b85d2e..55486feb3e 100644
--- a/sysdeps/unix/sysv/linux/sys/sysmacros.h
+++ b/sysdeps/unix/sysv/linux/sys/sysmacros.h
@@ -21,9 +21,18 @@
 
 #define _SYS_SYSMACROS_H	1
 
-/* For compatibility we provide alternative names.  */
-#define major(dev) (((dev) >> 8) & 0xff)
-#define minor(dev) ((dev) & 0xff)
-#define makedev(major, minor) (((major) << 8) | (minor))
+/* For compatibility we provide alternative names.
+
+   The problem here is that compilers other than GCC probably don't
+   have the `long long' type and so `dev_t' is actually an array.  */
+#if defined __GNUC__ && __GNUC__ >= 2
+# define major(dev) ((int)(((dev) >> 8) & 0xff))
+# define minor(dev) ((int)((dev) & 0xff))
+# define makedev(major, minor) (((major) << 8) | (minor))
+#else
+# define major(dev) (((dev).__val[0] >> 8) & 0xff)
+# define minor(dev) ((dev).__val[0] & 0xff)
+# define makedev(major, minor) { (((major) << 8) | (minor)), 0 }
+#endif
 
 #endif /* _SYS_SYSMACROS_H */