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274 lines
10 KiB
HTML
274 lines
10 KiB
HTML
<!--#if expr="$FAQMASTER" -->
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
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<HTML>
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<HEAD>
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<TITLE>Apache Server Frequently Asked Questions</TITLE>
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</HEAD>
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<!-- Background white, links blue (unvisited), navy (visited), red (active) -->
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<BODY
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BGCOLOR="#FFFFFF"
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TEXT="#000000"
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LINK="#0000FF"
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VLINK="#000080"
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ALINK="#FF0000"
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>
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<!--#include virtual="header.html" -->
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<H1 ALIGN="CENTER">Apache Server Frequently Asked Questions</H1>
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<P>
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$Revision: 1.1 $ ($Date: 1999/06/24 15:02:51 $)
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</P>
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<P>
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The latest version of this FAQ is always available from the main
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Apache web site, at
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<<A
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HREF="http://www.apache.org/docs/misc/FAQ.html"
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REL="Help"
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><SAMP>http://www.apache.org/docs/misc/FAQ.html</SAMP></A>>.
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</P>
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<!-- Notes about changes: -->
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<!-- - If adding a relative link to another part of the -->
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<!-- documentation, *do* include the ".html" portion. There's a -->
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<!-- good chance that the user will be reading the documentation -->
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<!-- on his own system, which may not be configured for -->
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<!-- multiviews. -->
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<!-- - When adding items, make sure they're put in the right place -->
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<!-- - verify that the numbering matches up. -->
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<!-- - *Don't* use <PRE></PRE> blocks - they don't appear -->
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<!-- correctly in a reliable way when this is converted to text -->
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<!-- with Lynx. Use <DL><DD><CODE>xxx<BR>xx</CODE></DD></DL> -->
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<!-- blocks inside a <P></P> instead. This is necessary to get -->
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<!-- the horizontal and vertical indenting right. -->
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<!-- - Don't forget to include an HR tag after the last /P tag -->
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<!-- but before the /LI in an item. -->
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<P>
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If you are reading a text-only version of this FAQ, you may find numbers
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enclosed in brackets (such as "[12]"). These refer to the list of
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reference URLs to be found at the end of the document. These references
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do not appear, and are not needed, for the hypertext version.
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</P>
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<H2>The Questions</H2>
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<OL TYPE="A">
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<!--#endif -->
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<!--#if expr="$TOC || $STANDALONE" -->
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<LI VALUE="3"><STRONG>Building Apache</STRONG>
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<OL>
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<LI><A HREF="#bind8.1">Why do I get an error about an undefined
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reference to "<SAMP>__inet_ntoa</SAMP>" or other
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<SAMP>__inet_*</SAMP> symbols?</A>
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</LI>
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<LI><A HREF="#cantbuild">Why won't Apache compile with my
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system's <SAMP>cc</SAMP>?</A>
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</LI>
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<LI><A HREF="#linuxiovec">Why do I get complaints about redefinition
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of "<CODE>struct iovec</CODE>" when compiling under Linux?</A>
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</LI>
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<LI><A HREF="#broken-gcc">I'm using gcc and I get some compilation errors,
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what is wrong?</A>
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</LI>
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<LI><A HREF="#glibc-crypt">I'm using RedHat Linux 5.0, or some other
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<SAMP>glibc</SAMP>-based Linux system, and I get errors with the
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<CODE>crypt</CODE> function when I attempt to build Apache 1.2.</A>
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</LI>
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</OL>
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</LI>
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<!--#endif -->
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<!--#if expr="$STANDALONE" -->
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</OL>
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<HR>
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<H2>The Answers</H2>
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<!--#endif -->
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<!--#if expr="! $TOC" -->
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<H3>C. Building Apache</H3>
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<OL>
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<LI><A NAME="bind8.1">
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<STRONG>Why do I get an error about an undefined reference to
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"<SAMP>__inet_ntoa</SAMP>" or other
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<SAMP>__inet_*</SAMP> symbols?</STRONG>
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</A>
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<P>
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If you have installed <A HREF="http://www.isc.org/bind.html">BIND-8</A>
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then this is normally due to a conflict between your include files
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and your libraries. BIND-8 installs its include files and libraries
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<CODE>/usr/local/include/</CODE> and <CODE>/usr/local/lib/</CODE>, while
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the resolver that comes with your system is probably installed in
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<CODE>/usr/include/</CODE> and <CODE>/usr/lib/</CODE>. If
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your system uses the header files in <CODE>/usr/local/include/</CODE>
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before those in <CODE>/usr/include/</CODE> but you do not use the new
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resolver library, then the two versions will conflict.
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</P>
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<P>
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To resolve this, you can either make sure you use the include files
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and libraries that came with your system or make sure to use the
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new include files and libraries. Adding <CODE>-lbind</CODE> to the
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<CODE>EXTRA_LDFLAGS</CODE> line in your <SAMP>Configuration</SAMP>
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file, then re-running <SAMP>Configure</SAMP>, should resolve the
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problem. (Apache versions 1.2.* and earlier use
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<CODE>EXTRA_LFLAGS</CODE> instead.)
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</P>
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<P>
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<STRONG>Note:</STRONG>As of BIND 8.1.1, the bind libraries and files are
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installed under <SAMP>/usr/local/bind</SAMP> by default, so you
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should not run into this problem. Should you want to use the bind
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resolvers you'll have to add the following to the respective lines:
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</P>
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<P>
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<DL>
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<DD><CODE>EXTRA_CFLAGS=-I/usr/local/bind/include
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<BR>
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EXTRA_LDFLAGS=-L/usr/local/bind/lib
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<BR>
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EXTRA_LIBS=-lbind</CODE>
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</DD>
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</DL>
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<P></P>
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<HR>
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</LI>
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<LI><A NAME="cantbuild">
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<STRONG>Why won't Apache compile with my system's
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<SAMP>cc</SAMP>?</STRONG>
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</A>
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<P>
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If the server won't compile on your system, it is probably due to one
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of the following causes:
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</P>
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<UL>
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<LI><STRONG>The <SAMP>Configure</SAMP> script doesn't recognize your system
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environment.</STRONG>
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<BR>
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This might be either because it's completely unknown or because
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the specific environment (include files, OS version, <EM>et
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cetera</EM>) isn't explicitly handled. If this happens, you may
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need to port the server to your OS yourself.
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</LI>
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<LI><STRONG>Your system's C compiler is garbage.</STRONG>
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<BR>
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Some operating systems include a default C compiler that is either
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not ANSI C-compliant or suffers from other deficiencies. The usual
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recommendation in cases like this is to acquire, install, and use
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<SAMP>gcc</SAMP>.
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</LI>
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<LI><STRONG>Your <SAMP>include</SAMP> files may be confused.</STRONG>
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<BR>
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In some cases, we have found that a compiler installation or system
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upgrade has left the C header files in an inconsistent state. Make
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sure that your include directory tree is in sync with the compiler and
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the operating system.
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</LI>
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<LI><STRONG>Your operating system or compiler may be out of
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revision.</STRONG>
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<BR>
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Software vendors (including those that develop operating systems)
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issue new releases for a reason; sometimes to add functionality, but
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more often to fix bugs that have been discovered. Try upgrading
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your compiler and/or your operating system.
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</LI>
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</UL>
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<P>
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The Apache Group tests the ability to build the server on many
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different platforms. Unfortunately, we can't test all of the OS
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platforms there are. If you have verified that none of the above
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issues is the cause of your problem, and it hasn't been reported
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before, please submit a
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<A HREF="http://www.apache.org/bug_report.html">problem report</A>.
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Be sure to include <EM>complete</EM> details, such as the compiler
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& OS versions and exact error messages.
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</P>
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<HR>
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</LI>
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<LI><A NAME="linuxiovec">
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<STRONG>Why do I get complaints about redefinition
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of "<CODE>struct iovec</CODE>" when
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compiling under Linux?</STRONG>
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</A>
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<P>
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This is a conflict between your C library includes and your kernel
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includes. You need to make sure that the versions of both are matched
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properly. There are two workarounds, either one will solve the problem:
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</P>
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<P>
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<UL>
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<LI>Remove the definition of <CODE>struct iovec</CODE> from your C
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library includes. It is located in <CODE>/usr/include/sys/uio.h</CODE>.
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<STRONG>Or,</STRONG>
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</LI>
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<LI>Add <CODE>-DNO_WRITEV</CODE> to the <CODE>EXTRA_CFLAGS</CODE>
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line in your <SAMP>Configuration</SAMP> and reconfigure/rebuild.
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This hurts performance and should only be used as a last resort.
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</LI>
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</UL>
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<P></P>
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<HR>
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</LI>
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<LI><A NAME="broken-gcc"><STRONG>I'm using gcc and I get some
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compilation errors, what is wrong?</STRONG></A>
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<P>
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GCC parses your system header files and produces a modified subset which
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it uses for compiling. This behaviour ties GCC tightly to the version
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of your operating system. So, for example, if you were running IRIX 5.3
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when you built GCC and then upgrade to IRIX 6.2 later, you will have to
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rebuild GCC. Similarly for Solaris 2.4, 2.5, or 2.5.1 when you upgrade
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to 2.6. Sometimes you can type "gcc -v" and it will tell you the version
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of the operating system it was built against.
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</P>
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<P>
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If you fail to do this, then it is very likely that Apache will fail
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to build. One of the most common errors is with <CODE>readv</CODE>,
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<CODE>writev</CODE>, or <CODE>uio.h</CODE>. This is <STRONG>not</STRONG> a
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bug with Apache. You will need to re-install GCC.
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</P>
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<HR>
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</LI>
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<LI><A NAME="glibc-crypt">
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<STRONG>I'm using RedHat Linux 5.0, or some other
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<SAMP>glibc</SAMP>-based Linux system, and I get errors with the
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<CODE>crypt</CODE> function when I attempt to build Apache 1.2.</STRONG>
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</A>
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<P>
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<SAMP>glibc</SAMP> puts the <CODE>crypt</CODE> function into a separate
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library. Edit your <CODE>src/Configuration</CODE> file and set this:
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</P>
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<DL>
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<DD><CODE>EXTRA_LIBS=-lcrypt</CODE>
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</DD>
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</DL>
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<P>
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Then re-run <SAMP>src/Configure</SAMP> and re-execute the make.
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</P>
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<HR>
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</LI>
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</OL>
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<!--#endif -->
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<!--#if expr="$STANDALONE" -->
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<!-- Don't forget to add HR tags at the end of each list item.. -->
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<!--#include virtual="footer.html" -->
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</BODY>
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</HTML>
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<!--#endif -->
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