Another approach is to let gcc do the parse for you, then load the result.

You can do this by running gcc on the source files with -fdump-translation-unit option. GCC::TranslationUnit can then be used to examine the parse tree.

From the GCC::TranslationUnit doco:

use GCC::TranslationUnit;

  # echo '#include <stdio.h>' > stdio.c
  # gcc -fdump-translation-unit -c stdio.c
  $node = GCC::TranslationUnit::Parser->parsefile('stdio.c.tu')->root;

  # list every function/variable name
  while($node) {
    if($node->isa('GCC::Node::function_decl') or
       $node->isa('GCC::Node::var_decl')) {
      printf "%s declared in %s\n",
        $node->name->identifier, $node->source;
    }
  } continue {
    $node = $node->chain;
  }
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