mingw/info/stabs/Typedefs.html

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  18
  19 <h3 class="section">Giving a Type a Name</h3>
  20
  21    <p>To give a type a name, use the <code>t</code> symbol descriptor.  The type
  22 is specified by the type information (see <a href="String-Field.html#String%20Field">String Field</a>) for the stab.
  23 For example,
  24
  25 <pre class="example">     .stabs "s_typedef:t16",128,0,0,0     # 128 is N_LSYM
  26      </pre>
  27
  28    <p>specifies that <code>s_typedef</code> refers to type number 16.  Such stabs
  29 have symbol type <code>N_LSYM</code> (or <code>C_DECL</code> for XCOFF).  (The Sun
  30 documentation mentions using <code>N_GSYM</code> in some cases).
  31
  32    <p>If you are specifying the tag name for a structure, union, or
  33 enumeration, use the <code>T</code> symbol descriptor instead.  I believe C is
  34 the only language with this feature.
  35
  36    <p>If the type is an opaque type (I believe this is a Modula-2 feature),
  37 AIX provides a type descriptor to specify it.  The type descriptor is
  38 <code>o</code> and is followed by a name.  I don't know what the name
  39 means--is it always the same as the name of the type, or is this type
  40 descriptor used with a nameless stab (see <a href="String-Field.html#String%20Field">String Field</a>)?  There
  41 optionally follows a comma followed by type information which defines
  42 the type of this type.  If omitted, a semicolon is used in place of the
  43 comma and the type information, and the type is much like a generic
  44 pointer type--it has a known size but little else about it is
  45 specified.
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