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    <p>PC Lint creates some sort of run-time database when it parses your source files, noting things like global variables, extern-declarations, etc. When it has processed all compilation units (C files with all included files, recursively), it does what a linker does to generate your output, but in stead of generating code, it reports on certain types of errors, for instance: An extern-declaration that has not been used, an unused prototype without implementation, unused global functions. These are issues not always reported by the linker, since the code generation is very well possible: The items have never been used anywhere!</p> <p>The search depth can be influenced by the option <code>-passes</code>, which enables a far better value-tracking at the cost of execution time. Refer to seciton 10.2.2.4 in the PDF manual (for version 9.x).</p> <p>To your second question, no, if you only provide one (or a few) source (C) file name(s) on your Lint command line, PC Lint will process only that file - and all include files used, recursively. You may want to use the option <code>-u</code> for "unit-checkout" to tell PC Lint that it only processes a part of a full project. Lint will then suppress certain kinds of warnings not useful for a partial project.</p>
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    1. POHow does PC-Lint (by Gimpel) look across multiple modules?
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    1. USJohan Bezem
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    1. POHow does PC-Lint (by Gimpel) look across multiple modules?
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    1. COThanks. Could you elaborate on the order in which the compilation units are recursively processed. Will PC-Lint proceed to each included file until it can do so not longer, then process its way back up? Another way to say this is in terms of a tree. Will lint create the tree then process each file starting from the leaves of the tree and working its way back to the root. An example would be if I have a c file which includes x1.h which, in turn, includes x2.h and x3.h. I would expect lint to process x2.h, x3.h, x1.h, and lastly the cfile. Is this correct?
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    2. COEvery C file is processed like a compiler would. For each compilation unit, Lint looks at the header files included, processes them, and if they include further header files it processes them, etc. Therefore, recursively. The C files are processed one after the other, until all have been processed. So in your example, it would start reading the C file, and when x1.h is included it would process x1.h until x2.h is included, etc. After all included files have been processed, it would process the remaining part of the C file and finish.
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    3. COOk. From what I see in my output, if two source files include the same header file, that header file is analyzed once for each source file and thus its messages are repeated. I think this adds unnecessary clutter to my output file. Is there a good reason that PC-Lint does this? Is there a way to tell PC-Lint to remember previously linted header files and ignore them if encountered again?
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