(struct cmsghdr): Don't declare __cmsg_data field if its size would be bigger

than 0.
(CMSG_DATA): Adjust accordingly.

diff --git a/sysdeps/unix/sysv/aix/bits/socket.h b/sysdeps/unix/sysv/aix/bits/socket.h
index 45877fa..1fdadfe 100644 (file)
--- a/sysdeps/unix/sysv/aix/bits/socket.h
+++ b/sysdeps/unix/sysv/aix/bits/socket.h
@@ -203,14 +203,13 @@ struct cmsghdr
                                   of cmsghdr structure.  */
     int cmsg_level;            /* Originating protocol.  */
     int cmsg_type;             /* Protocol specific type.  */
-#if !defined __STRICT_ANSI__ && defined __GNUC__ && __GNUC__ >= 2
-    unsigned char __cmsg_data[0]; /* Ancillary data.  */
-    /* XXX Perhaps this should be removed.  */
+#if (!defined __STRICT_ANSI__ && __GNUC__ >= 2) || __STDC_VERSION__ >= 199901L
+    __extension__ unsigned char __cmsg_data __flexarr; /* Ancillary data.  */
 #endif
   };
 
 /* Ancillary data object manipulation macros.  */
-#if !defined __STRICT_ANSI__ && defined __GNUC__ && __GNUC__ >= 2
+#if (!defined __STRICT_ANSI__ && __GNUC__ >= 2) || __STDC_VERSION__ >= 199901L
 # define CMSG_DATA(cmsg) ((cmsg)->__cmsg_data)
 #else
 # define CMSG_DATA(cmsg) ((unsigned char *) ((struct cmsghdr *) (cmsg) + 1))

diff --git a/sysdeps/unix/sysv/linux/alpha/bits/socket.h b/sysdeps/unix/sysv/linux/alpha/bits/socket.h
index 2d57128..82c4302 100644 (file)
--- a/sysdeps/unix/sysv/linux/alpha/bits/socket.h
+++ b/sysdeps/unix/sysv/linux/alpha/bits/socket.h
@@ -233,12 +233,13 @@ struct cmsghdr
                                   of cmsghdr structure.  */
     int cmsg_level;            /* Originating protocol.  */
     int cmsg_type;             /* Protocol specific type.  */
+#if (!defined __STRICT_ANSI__ && __GNUC__ >= 2) || __STDC_VERSION__ >= 199901L
     __extension__ unsigned char __cmsg_data __flexarr; /* Ancillary data.  */
-    /* XXX Perhaps this should be removed.  */
+#endif
   };
 
 /* Ancillary data object manipulation macros.  */
-#if !defined __STRICT_ANSI__ && defined __GNUC__ && __GNUC__ >= 2
+#if (!defined __STRICT_ANSI__ && __GNUC__ >= 2) || __STDC_VERSION__ >= 199901L
 # define CMSG_DATA(cmsg) ((cmsg)->__cmsg_data)
 #else
 # define CMSG_DATA(cmsg) ((unsigned char *) ((struct cmsghdr *) (cmsg) + 1))

diff --git a/sysdeps/unix/sysv/linux/mips/bits/socket.h b/sysdeps/unix/sysv/linux/mips/bits/socket.h
index 482eefe..a10c3a7 100644 (file)
--- a/sysdeps/unix/sysv/linux/mips/bits/socket.h
+++ b/sysdeps/unix/sysv/linux/mips/bits/socket.h
@@ -233,12 +233,13 @@ struct cmsghdr
                                   of cmsghdr structure.  */
     int cmsg_level;            /* Originating protocol.  */
     int cmsg_type;             /* Protocol specific type.  */
+#if (!defined __STRICT_ANSI__ && __GNUC__ >= 2) || __STDC_VERSION__ >= 199901L
     __extension__ unsigned char __cmsg_data __flexarr; /* Ancillary data.  */
-    /* XXX Perhaps this should be removed.  */
+#endif
   };
 
 /* Ancillary data object manipulation macros.  */
-#if !defined __STRICT_ANSI__ && defined __GNUC__ && __GNUC__ >= 2
+#if (!defined __STRICT_ANSI__ && __GNUC__ >= 2) || __STDC_VERSION__ >= 199901L
 # define CMSG_DATA(cmsg) ((cmsg)->__cmsg_data)
 #else
 # define CMSG_DATA(cmsg) ((unsigned char *) ((struct cmsghdr *) (cmsg) + 1))