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71<a name="File-Names-and-DBX"></a>
72<div class="header">
73<p>
74Next: <a href="SDB-and-DWARF.html#SDB-and-DWARF" accesskey="n" rel="next">SDB and DWARF</a>, Previous: <a href="DBX-Hooks.html#DBX-Hooks" accesskey="p" rel="prev">DBX Hooks</a>, Up: <a href="Debugging-Info.html#Debugging-Info" accesskey="u" rel="up">Debugging Info</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Option-Index.html#Option-Index" title="Index" rel="index">Index</a>]</p>
75</div>
76<hr>
77<a name="File-Names-in-DBX-Format"></a>
78<h4 class="subsection">17.22.4 File Names in DBX Format</h4>
79
80<p>This describes file names in DBX format.
81</p>
82<dl>
83<dt><a name="index-DBX_005fOUTPUT_005fMAIN_005fSOURCE_005fFILENAME"></a>Macro: <strong>DBX_OUTPUT_MAIN_SOURCE_FILENAME</strong> <em>(<var>stream</var>, <var>name</var>)</em></dt>
84<dd><p>A C statement to output DBX debugging information to the stdio stream
85<var>stream</var>, which indicates that file <var>name</var> is the main source
86file&mdash;the file specified as the input file for compilation.
87This macro is called only once, at the beginning of compilation.
88</p>
89<p>This macro need not be defined if the standard form of output
90for DBX debugging information is appropriate.
91</p>
92<p>It may be necessary to refer to a label equal to the beginning of the
93text section. You can use &lsquo;<samp>assemble_name (stream, ltext_label_name)</samp>&rsquo;
94to do so. If you do this, you must also set the variable
95<var>used_ltext_label_name</var> to <code>true</code>.
96</p></dd></dl>
97
98<dl>
99<dt><a name="index-NO_005fDBX_005fMAIN_005fSOURCE_005fDIRECTORY"></a>Macro: <strong>NO_DBX_MAIN_SOURCE_DIRECTORY</strong></dt>
100<dd><p>Define this macro, with value 1, if GCC should not emit an indication
101of the current directory for compilation and current source language at
102the beginning of the file.
103</p></dd></dl>
104
105<dl>
106<dt><a name="index-NO_005fDBX_005fGCC_005fMARKER"></a>Macro: <strong>NO_DBX_GCC_MARKER</strong></dt>
107<dd><p>Define this macro, with value 1, if GCC should not emit an indication
108that this object file was compiled by GCC. The default is to emit
109an <code>N_OPT</code> stab at the beginning of every source file, with
110&lsquo;<samp>gcc2_compiled.</samp>&rsquo; for the string and value 0.
111</p></dd></dl>
112
113<dl>
114<dt><a name="index-DBX_005fOUTPUT_005fMAIN_005fSOURCE_005fFILE_005fEND"></a>Macro: <strong>DBX_OUTPUT_MAIN_SOURCE_FILE_END</strong> <em>(<var>stream</var>, <var>name</var>)</em></dt>
115<dd><p>A C statement to output DBX debugging information at the end of
116compilation of the main source file <var>name</var>. Output should be
117written to the stdio stream <var>stream</var>.
118</p>
119<p>If you don&rsquo;t define this macro, nothing special is output at the end
120of compilation, which is correct for most machines.
121</p></dd></dl>
122
123<dl>
124<dt><a name="index-DBX_005fOUTPUT_005fNULL_005fN_005fSO_005fAT_005fMAIN_005fSOURCE_005fFILE_005fEND"></a>Macro: <strong>DBX_OUTPUT_NULL_N_SO_AT_MAIN_SOURCE_FILE_END</strong></dt>
125<dd><p>Define this macro <em>instead of</em> defining
126<code>DBX_OUTPUT_MAIN_SOURCE_FILE_END</code>, if what needs to be output at
127the end of compilation is an <code>N_SO</code> stab with an empty string,
128whose value is the highest absolute text address in the file.
129</p></dd></dl>
130
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134Next: <a href="SDB-and-DWARF.html#SDB-and-DWARF" accesskey="n" rel="next">SDB and DWARF</a>, Previous: <a href="DBX-Hooks.html#DBX-Hooks" accesskey="p" rel="prev">DBX Hooks</a>, Up: <a href="Debugging-Info.html#Debugging-Info" accesskey="u" rel="up">Debugging Info</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Option-Index.html#Option-Index" title="Index" rel="index">Index</a>]</p>
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