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<h3 class="section">12.1 Environment variables</h3>
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<a name="index-Variables_002c-environment"></a>
<p><code>FWEB_HDR_INCLUDES</code> — Colon-delimited list of directories for the
C preprocessor (in the form of <code>gcc</code>) to
search for ‘<samp>#include</samp>’ header files. This is used in conjunction
with the ‘<samp>-H</samp>’ option; see <a href="_002dH_005f.html#g_t_002dH_005f">-H_</a>. (One can append to this list
by means of the ‘<samp>-I</samp>’ option, provided that option comes
<em>after</em> the ‘<samp>-H</samp>’; see <a href="_002dI_005f.html#g_t_002dI_005f">-I_</a>.)
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<p><code>FWEB_INCLUDES</code> — Colon-delimited list of directories to search for
‘<samp>@i</samp>’ include files. (One can append to this list by means of the
‘<samp>-I</samp>’ option, provided that option comes <em>before</em> any use of
‘<samp>-H</samp>’; see <a href="_002dI_005f.html#g_t_002dI_005f">-I_</a>.)
<a name="index-FWEB_005fINCLUDES"></a>
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<p><code>FWEB_INI</code> — Name of the initialization file. If not defined, either
<samp>.fweb</samp> or <samp>fweb.ini</samp> is chosen, depending on the machine. The
initialization file always resides in <code>$HOME</code>.
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<p><code>FWEB_STYLE_DIR</code> — Directory in which the style file resides. If not
defined, the current directory is used.
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