line.html

来自「gcc手册」· HTML 代码 · 共 43 行

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Node:<a name="Line">Line</a>,

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<h3 class="section"><code>.line </code><var>line-number</var><code></code></h3>



   <p>Change the logical line number.  <var>line-number</var> must be an absolute

expression.  The next line has that logical line number.  Therefore any other

statements on the current line (after a statement separator character) are

reported as on logical line number <var>line-number</var> - 1.  One day

<code>as</code> will no longer support this directive: it is recognized only

for compatibility with existing assembler programs.



   <p><em>Warning:</em> In the AMD29K configuration of as, this command is

not available; use the synonym <code>.ln</code> in that context.



   <p>Even though this is a directive associated with the <code>a.out</code> or

<code>b.out</code> object-code formats, <code>as</code> still recognizes it

when producing COFF output, and treats <code>.line</code> as though it

were the COFF <code>.ln</code> <em>if</em> it is found outside a

<code>.def</code>/<code>.endef</code> pair.



   <p>Inside a <code>.def</code>, <code>.line</code> is, instead, one of the directives

used by compilers to generate auxiliary symbol information for

debugging.



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