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<base href="https://bugzilla.netfilter.org/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Compilation failure on Linux 4.5.x when including libiptc/libiptc.h"
href="https://bugzilla.netfilter.org/show_bug.cgi?id=1067">1067</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Compilation failure on Linux 4.5.x when including libiptc/libiptc.h
</td>
</tr>
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<th>Product</th>
<td>iptables
</td>
</tr>
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<th>Version</th>
<td>1.4.x
</td>
</tr>
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<th>Hardware</th>
<td>x86_64
</td>
</tr>
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<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
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<th>Priority</th>
<td>P5
</td>
</tr>
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<th>Component</th>
<td>iptables
</td>
</tr>
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<th>Assignee</th>
<td>netfilter-buglog@lists.netfilter.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>quentin@armitage.org.uk
</td>
</tr></table>
<p>
<div>
<pre>Including <libiptc/libiptc.h> causes a compilation failure with multiple
messages like:
In file included from /usr/include/linux/netfilter_ipv4/ip_tables.h:20:0,
from /usr/include/libiptc/libiptc.h:12,
from /tmp/inc.c:1:
/usr/include/linux/if.h:71:2: error: redeclaration of enumerator ‘IFF_UP’
In file included from /usr/include/libiptc/ipt_kernel_headers.h:14:0,
from /usr/include/libiptc/libiptc.h:6,
from /tmp/inc.c:1:
/usr/include/net/if.h:44:5: note: previous definition of ‘IFF_UP’ was here
Kernel patch 1ffad83dffd675cd742286ae82dca7d746cb0da8 appears to have caused
the problem, by including <linux/if.h>, which has multiple namespace collisions
with <net/if.h>.
<libiptc/libiptc.h> includes <libiptc/ipt_kernel_headers.h> and also
<linux/netfilter_ipv4/ip_tables.h>.
<libiptc/ipt_kernel_headers.h> includes <net/if.h>, and since the above kernel
patch, <linux/netfilter_ipv4/ip_tables.h> includes <linux.if.h>.</pre>
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