Checking C programs with lint - download pdf or read online

By Ian F. Darwin

The lint application checker has confirmed many times to be the most effective instruments for locating portability difficulties and sure varieties of coding mistakes in C courses. This ebook introduces you to lint, publications you thru working it in your courses, and permits you to interpretlint's output.lint verifies a software or application segments opposed to normal libraries, tests the code for universal portability blunders, and exams the programming opposed to a few attempted and real directions. linting your code is an important (though now not adequate) step in writing fresh, transportable, powerful programs.Contents include:

  • Overview of utilizing lint
  • Dealing with lint' issues: casting and delinting
  • lint comments
  • Using lint intimately: command line recommendations, utilizing lint with make, rolling your individual lint library
  • Public area programs
  • Under the hood: an within look
  • Future directions

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Declaring external variables and then not using them is Page 28 mildly wasteful—the compiler has to parse the declarations and then winds up discarding them—so you should run this checking periodically.  If the lint program is written as a shell file (see Chapter 6, Under the Hood), it can easily be extended to support this method. To wrap up, here is a summary of the options that lint will accept on the systems we've discussed. out which prints it on your terminal and puts it into a file.  If you are on a recent System V, you can use "incremental linting" with lint ­c.

The SVID also states: This scheme works well with make; it allows make to be used to lint only the source files that have been modified since the last time the set of source files was checked with lint.  Here is another method for use on non­SVID systems; this method only lints the changed modules, and does not check their inter­module references. c lint: $(SRC) lint $(LINTFLAGS) ­u $?  lintall will also re­check for inconsistencies between modules, so it's wise to use this make entry periodically.

See [Ros84] for some thoughts on C's evolution, as well as the draft ANSI C standard [dpANS] itself.  There are apparently no plans for a C++ lint at present. As well, Syntax­Directed Editors (also called Program Synthesizers) have been claimed to prevent or reduce the errors that get into source programs in the first place; these are an obvious area where careful planning of the ''templates" used to specify valid input, and to provide automatic insertion of keywords, can reduce the number of careless constructs and hence reduce the number of complaints from lint.

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