+ <section xml:id="docbook.debug">
+ <info><title>Debugging Generation</title></info>
+
+ <para>
+ Sometimes, mis-configuration of the pre-requisite tools can
+ lead to errors when attempting to build the
+ documentation. Here are some of the obvious errors, and ways
+ to fix some common issues that may appear quite cryptic.
+ </para>
+
+ <para>
+ First, if using a rule like <code>make pdf</code>, try to
+ narrow down the scope of the error to either docbook
+ (<code>make doc-pdf-docbook</code>) or doxygen (<code>make
+ doc-pdf-doxygen</code>).
+ </para>
+
+ <para>
+ Working on the docbook path only, closely examine the
+ contents of the following build directory:
+ <filename>build/target/libstdc++-v3/doc/docbook/latex</filename>.
+ Pay attention to three files enclosed within, annotated as follows.
+ </para>
+
+<itemizedlist>
+
+<listitem>
+ <para>
+ <emphasis>spine.tex</emphasis>
+ </para>
+
+ <para>
+ The actual latex file, or partial latex file. This is generated
+ via <command>dblatex</command>, and is the LaTeX version of the
+ DocBook XML file <filename>spine.xml</filename>. Go to a specific
+ line, and look at the genrated LaTeX, and try to deduce what
+ markup in <filename>spine.xml</filename> is causing it.
+ </para>
+</listitem>
+
+<listitem>
+ <para>
+ <emphasis>spine.out</emphasis>
+ </para>
+
+ <para>
+ A log of the conversion from the XML form to the LaTeX form. This
+ is a linear list, from the beginning of the
+ <filename>spine.xml</filename> file: the last entry of this file
+ should be the end of the DocBook file. If it is truncated, then
+ you know that the last entry is the last part of the XML source
+ file that is valid. The error is after this point.
+ </para>
+</listitem>
+
+
+<listitem>
+ <para>
+ <emphasis>spine.log</emphasis>
+ </para>
+
+ <para>
+ A log of the compilation of the converted LaTeX form to pdf. This
+ is a linear list, from the beginning of the
+ <filename>spine.tex</filename> file: the last entry of this file
+ should be the end of the LaTeX file. If it is truncated, then you
+ know that the last entry is the last part of the generated LaTeX
+ source file that is valid. Often this file contains an error with
+ a specific line number of <filename>spine.tex</filename> that is
+ incorrect.
+ </para>
+</listitem>
+
+</itemizedlist>
+
+ <para>
+ If the error at hand is not obvious after examination, or if one
+ encounters the inscruitable <quote>Incomplete
+ \ifmmode</quote> error, a fall-back strategy is to start
+ commenting out parts of the XML document (regardless of what
+ this does to over-all document validity). Start by
+ commenting out each of the largest parts of the
+ <filename>spine.xml</filename> file, section by section,
+ until the offending section is identified.
+ </para>
+
+
+ </section>
+