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2012-01-16T03:33:03.393
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2012-01-16T03:33:03.393
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<a href="http://cscope.sourceforge.net/" rel="nofollow"><code>cscope</code></a> is one of my favorite tools for understanding C code but it may not translate well to the Windows world. <a href="http://ctags.sourceforge.net/" rel="nofollow">exuberant <code>ctags</code></a> is an excellent tool for finding definitions in dozens of languages. Most reasonable programming editors provide some interface for calling into <code>ctags</code> for definition information. (<code>vim</code>, for example, allows you to use <code>^]</code> to find a definition of a symbol and <code>^T</code> to pop back up the definition stack.) You build a database using <code>ctags -R .</code> and look up definitions using your editor. (For example, <code>vim -t foo</code> will look up the <code>foo</code> tag in the <code>ctags</code> database and jump to that file and line.) The <a href="http://www.gnu.org/software/idutils/" rel="nofollow">GNU <code>idutils</code></a> package provides some nice utilities similar to <code>ctags</code> for finding uses of symbols in a variety of languages. Integration isn't as good in most editors as <code>ctags</code> or <code>cscope</code> but it might be easier for you to write tools. You build the database with <code>mkid .</code> and look up symbols with <code>gid foo</code> or <code>lid foo</code> or similar lookups. I find the three tools provide different enough functionality that I use all three commonly. <code>ctags</code> makes hunting through source in <code>vim</code> extremely quick, <code>cscope</code> can help find callers and callees, and <code>gid</code> (especially <code>gid -s ...</code>) is good for just getting some hints on complex situations that the other tools don't just have solved. (Neither <code>ctags</code> nor <code>cscope</code> understands <a href="http://gcc.gnu.org/onlinedocs/cpp/Concatenation.html" rel="nofollow">token pasting</a> well, but <code>gid -s</code> lets me approximate a solution myself.)
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1. POWhat is a good way to find definitions in header files when using gcc?
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1. USsarnold
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