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I've got a project built with SCons and I'm trying to use the Clang Static Analyzer to analyze the code. However, when running

scan-build scons

SCons seems to ignore the settings introduced by scan-build. How can I make this work?

Greg Hewgill
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1 Answers1

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The way scan-build works is it sets up various environment variables that are usually used by build systems (such as make) to control how the build happens. Some of these are:

  • CC - name of program to use as C compiler
  • CXX - name of program to use as C++ compiler
  • CCC_* - various environment variables that control the behaviour of Clang's static analyzer

SCons normally cleans out the environment before running a build (this is a feature). In order to make the above environment variables take effect, do something like this in SConstruct:

env = Environment()
env["CC"] = os.getenv("CC") or env["CC"]
env["CXX"] = os.getenv("CXX") or env["CXX"]
env["ENV"].update(x for x in os.environ.items() if x[0].startswith("CCC_"))
Greg Hewgill
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  • I would add that you should grep for "Environment" in larger SConstruct files to find where the last three lines should go. – Chad Brewbaker Feb 10 '17 at 10:25