= Using clang for static analysis =

LLVM/Clang comes with a static analyzer that can be used to generate web-based analysis reports for many bug categories.

== Prerequistities ==

Make sure the analyzer is installed on your system. On Fedora 24 the package is called clang-analyzer. Also make sure you have web browser installed.

== Running the analysis ==

Configure HelenOS for e.g. amd64 and in the HelenOS source root directory run the following command:

{{{
$ scan-build make PROFILE=amd64
}}}

This should kick off the static analysis process and result in a message like the following:

{{{
scan-build: 121 bugs found.
scan-build: Run 'scan-view /tmp/scan-build-2016-07-18-210821-13060-1' to examine bug reports.
}}}

== Inspecting the results ==

When the analysis run is finished, one can inspect the result by the following command (assuming the output above):

{{{
$ scan-view /tmp/scan-build-2016-07-18-210821-13060-1
Starting scan-view at: http://127.0.0.1:8181
  Use Ctrl-C to exit.
Created new window in existing browser session.
}}}

Now you should be able to inspect the results in your web browser: