updated

LDP/faq/docbook/Linux-FAQ.sgml

@@ -12,8 +12,8 @@
      </author>
      <revhistory>
        <revision>
-          <revnumber>1.16</revnumber>
-	  <date>2001-09-16</date>
+          <revnumber>1.18</revnumber>
+	  <date>2001-10-13</date>
           <authorinitials>rk</authorinitials>
        </revision>
      </revhistory>
@@ -326,10 +326,20 @@ endterm="howtos-and-other-documentation">'')
 <sect2 label="1.6">
 <title id="what-ports-to-other-processors-are-there">
 Ports to Other Processors.</title>
-<para>The Web site, Overview of Linux Ports: <ulink
+<para>
+The Web site, Overview of Linux Ports: <ulink
 url="http://www.itp.uni-hannover.de/~kreutzm/de/lin_plattforms.html">
 <literal>http://www.itp.uni-hannover.de/~kreutzm/de/lin_plattforms.html
-</literal></ulink> provides a listing of known ports.  In addition,
+</literal></ulink> provides a listing of known ports.  
+</para>
+<para>
+Another site with a list of ports is:
+<ulink url="http://lodda.igo.uni-hannover.de/ports/linux_ports.html">
+<literal>http://lodda.igo.uni-hannover.de/ports/linux_ports.html</literal>
+</ulink>
+</para>
+<para>
+In addition,
 the following information is available about specific ports:
 </para>
 <para>
@@ -1389,7 +1399,7 @@ an up-to-date list of News groups.
 What Other FAQ's and Documentation Are There for Linux?
 </title>
 <para>
-There are a number of special-interest FAQ's on different subjects
+There are a number of special interest FAQ's on different subjects
 related to system administration and use, and also on miscellaneous topics
 like Flying Saucer Attacks (the music) and support for recovering
 sysadmins.
@@ -3207,6 +3217,11 @@ url="http://www.kaffe.org/"><literal>http://www.kaffe.org/</literal>.
 </ulink>
 </para>
 <para>
+There is a resource page of free and commercial Java packages
+at: <ulink url="http://www.blackdown.org/java-linux.html">
+<literal>http://www.blackdown.org/java-linux.html</literal></ulink>.
+</para>
+<para>
 Netscape <application>Communicator</application> comes with its own
 version of the <application>Java Runtime Environment</application>, so
 if you need Java only to view Web graphics, you may already have the
@@ -5724,6 +5739,41 @@ The file <filename>mm/swapfile.c</filename> has all of the gory details.
 [Peter Moulder, Gordon Weast]
 </para>
 </sect2>
+
+<sect2>
+<title id="math-lib-errors">
+How To Prevent Errors when Linking Programs with Math Functions.</title>
+<para>
+Older run-time libraries included the math library in the C run-time
+library, so it was not necessary to specify the math library separately.
+If the compiler generates a message like this when linking a program that
+uses math functions:
+</para>
+<para>
+<screen>
+   /tmp/ccDUQM4J.o: In function `main':
+   /tmp/ccDUQM4J.o(.text+0x19): undefined reference to `sqrt'
+   collect2: ld returned 1 exit status
+</screen>
+</para>
+<para>
+You need use the <literal>-lm</literal> option with GCC to link with
+the math libraries:
+</para>
+<para>
+<screen>
+   # gcc -o program program.c -lm
+</screen>
+</para>
+<para>
+Make sure also to use the statement 
+<literal>#include &lt;math.h&gt;</literal> in the source file.
+</para>
+<para>
+&lsqb;Florian Schmidt&rsqb;
+</para>
+</sect2>
+
 </sect1>
 
 <sect1 label="8">