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ctest_coverage
Perform the CTest Coverage Step as a Dashboard Client.
ctest_coverage([BUILD <build-dir>] [APPEND]
               [LABELS <label>...]
               [RETURN_VALUE <result-var>]
               [QUIET]
               )
  Collect coverage tool results and stores them in Coverage.xml for submission with the ctest_submit() command.
The options are:
BUILD <build-dir>- 
    Specify the top-level build directory. If not given, the 
CTEST_BINARY_DIRECTORYvariable is used. APPEND- 
    Mark results for append to those previously submitted to a dashboard server since the last 
ctest_start()call. Append semantics are defined by the dashboard server in use. LABELS- Filter the coverage report to include only source files labeled with at least one of the labels specified.
 RETURN_VALUE <result-var>- 
    Store in the 
<result-var>variable0if coverage tools ran without error and non-zero otherwise. QUIET- Suppress any CTest-specific non-error output that would have been printed to the console otherwise. The summary indicating how many lines of code were covered is unaffected by this option.
 
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Licensed under the BSD 3-clause License.
 https://cmake.org/cmake/help/v3.6/command/ctest_coverage.html