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commit 1c1e7fb65828c99d6e0f0f3857089b559a0c8189
Author: Carlos O'Donell <carlos@redhat.com>
Date: Thu Jun 2 23:30:11 2016 -0400
Fix macro API for __USE_KERNEL_IPV6_DEFS.
The use of __USE_KERNEL_IPV6_DEFS with ifndef is bad
practice per: https://sourceware.org/glibc/wiki/Wundef.
This change moves it to use 'if' and always define the
macro.
Please note that this is not the only problem with this
code. I have a series of fixes after this one to resolve
breakage with this code and add regression tests for it
via compile-only source testing (to be discussed in another
thread).
Unfortunately __USE_KERNEL_XATTR_DEFS is set by the kernel
and not glibc, and uses 'define', so we can't fix that yet.
Index: glibc-2.17-c758a686/inet/netinet/in.h
===================================================================
--- glibc-2.17-c758a686.orig/inet/netinet/in.h
+++ glibc-2.17-c758a686/inet/netinet/in.h
@@ -91,10 +91,10 @@ enum
IPPROTO_MAX
};
-/* If __USER_KERNEL_IPV6_DEFS is defined then the user has included the kernel
+/* If __USE_KERNEL_IPV6_DEFS is 1 then the user has included the kernel
network headers first and we should use those ABI-identical definitions
- instead of our own. */
-#ifndef __USE_KERNEL_IPV6_DEFS
+ instead of our own, otherwise 0. */
+#if !__USE_KERNEL_IPV6_DEFS
enum
{
IPPROTO_HOPOPTS = 0, /* IPv6 Hop-by-Hop options. */
@@ -205,7 +205,7 @@ enum
#define INADDR_ALLRTRS_GROUP ((in_addr_t) 0xe0000002) /* 224.0.0.2 */
#define INADDR_MAX_LOCAL_GROUP ((in_addr_t) 0xe00000ff) /* 224.0.0.255 */
-#ifndef __USE_KERNEL_IPV6_DEFS
+#if !__USE_KERNEL_IPV6_DEFS
/* IPv6 address */
struct in6_addr
{
@@ -248,7 +248,7 @@ struct sockaddr_in
sizeof (struct in_addr)];
};
-#ifndef __USE_KERNEL_IPV6_DEFS
+#if !__USE_KERNEL_IPV6_DEFS
/* Ditto, for IPv6. */
struct sockaddr_in6
{
@@ -284,7 +284,7 @@ struct ip_mreq_source
};
#endif
-#ifndef __USE_KERNEL_IPV6_DEFS
+#if !__USE_KERNEL_IPV6_DEFS
/* Likewise, for IPv6. */
struct ipv6_mreq
{
@@ -531,7 +531,7 @@ extern int bindresvport6 (int __sockfd,
#ifdef __USE_GNU
struct cmsghdr; /* Forward declaration. */
-#ifndef __USE_KERNEL_IPV6_DEFS
+#if !__USE_KERNEL_IPV6_DEFS
/* IPv6 packet information. */
struct in6_pktinfo
{
Index: glibc-2.17-c758a686/sysdeps/unix/sysv/linux/bits/in.h
===================================================================
--- glibc-2.17-c758a686.orig/sysdeps/unix/sysv/linux/bits/in.h
+++ glibc-2.17-c758a686/sysdeps/unix/sysv/linux/bits/in.h
@@ -30,7 +30,9 @@
/* This is not quite the same API since the kernel always defines s6_addr16 and
s6_addr32. This is not a violation of POSIX since POSIX says "at least the
following member" and that holds true. */
-# define __USE_KERNEL_IPV6_DEFS
+# define __USE_KERNEL_IPV6_DEFS 1
+#else
+# define __USE_KERNEL_IPV6_DEFS 0
#endif
/* Options for use with `getsockopt' and `setsockopt' at the IP level.