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