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# 2012-01-31, Lars Bilke
# - Enable Code Coverage
#
# 2013-09-17, Joakim Söderberg
# - Added support for Clang.
# - Some additional usage instructions.
#
# 2018-03-31, Bendik Samseth
# - Relax debug output.
# - Keep a copy of the coverage output for later use.
# - Updated coverage exclude patterns.
#
# 2018-01-03, HenryRLee
# - Allow for *Clang compiler names, not just Clang.
#
# 2018-01-03, Bendik Samseth
# - Only check compiler compatibility if in a coverage build.
#
#
# USAGE:
# 0. (Mac only) If you use Xcode 5.1 make sure to patch geninfo as described here:
# http://stackoverflow.com/a/22404544/80480
#
# 1. Copy this file into your cmake modules path.
#
# 2. Add the following line to your CMakeLists.txt:
# INCLUDE(CodeCoverage)
#
# 3. Set compiler flags to turn off optimization and enable coverage:
# SET(CMAKE_CXX_FLAGS "-g -O0 -fprofile-arcs -ftest-coverage")
# SET(CMAKE_C_FLAGS "-g -O0 -fprofile-arcs -ftest-coverage")
#
# 3. Use the function SETUP_TARGET_FOR_COVERAGE to create a custom make target
# which runs your test executable and produces a lcov code coverage report:
# Example:
# SETUP_TARGET_FOR_COVERAGE(
# my_coverage_target # Name for custom target.
# test_driver # Name of the test driver executable that runs the tests.
# # NOTE! This should always have a ZERO as exit code
# # otherwise the coverage generation will not complete.
# coverage # Name of output directory.
# )
#
# 4. Build a Debug build:
# cmake -DCMAKE_BUILD_TYPE=Debug ..
# make
# make my_coverage_target
#
#
# Param _targetname The name of new the custom make target
# Param _testrunner The name of the target which runs the tests.
# MUST return ZERO always, even on errors.
# If not, no coverage report will be created!
# Param _outputname lcov output is generated as _outputname.info
# HTML report is generated in _outputname/index.html
# Optional fourth parameter is passed as arguments to _testrunner
# Pass them in list form, e.g.: "-j;2" for -j 2
FUNCTION(SETUP_TARGET_FOR_COVERAGE _targetname _testrunner _outputname)
IF(NOT LCOV_PATH)
MESSAGE(FATAL_ERROR "lcov not found! Aborting...")
ENDIF() # NOT LCOV_PATH
IF(NOT GENHTML_PATH)
MESSAGE(FATAL_ERROR "genhtml not found! Aborting...")
ENDIF() # NOT GENHTML_PATH
# Setup target
ADD_CUSTOM_TARGET(${_targetname}
# Cleanup lcov
${LCOV_PATH} --directory . --zerocounters
# Run tests
COMMAND ${_testrunner} ${ARGV3}
# Capturing lcov counters and generating report
COMMAND ${LCOV_PATH} --directory . --capture --output-file ${_outputname}.info
COMMAND ${LCOV_PATH} --remove ${_outputname}.info '*/tests/*' '/usr/*' '*/external/*' '/Applications/*' --output-file ${_outputname}.info.cleaned
COMMAND ${GENHTML_PATH} -o ${_outputname} ${_outputname}.info.cleaned --demangle-cpp
COMMAND ${LCOV_PATH} --list ${_outputname}.info.cleaned
WORKING_DIRECTORY ${CMAKE_BINARY_DIR}
COMMENT "Resetting code coverage counters to zero.\nProcessing code coverage counters and generating report."
)
# Show info where to find the report
ADD_CUSTOM_COMMAND(TARGET ${_targetname} POST_BUILD
COMMAND ;
COMMENT "${BoldMagenta}Open ./${_outputname}/index.html in your browser to view the coverage report.${ColourReset}"
)
ENDFUNCTION() # SETUP_TARGET_FOR_COVERAGE
string(TOLOWER "${CMAKE_BUILD_TYPE}" cmake_build_type_tolower)
if (cmake_build_type_tolower STREQUAL "coverage")
# Check prereqs
FIND_PROGRAM( GCOV_PATH gcov )
FIND_PROGRAM( LCOV_PATH lcov )
FIND_PROGRAM( GENHTML_PATH genhtml )
FIND_PROGRAM( GCOVR_PATH gcovr PATHS ${CMAKE_SOURCE_DIR}/tests)
IF(NOT GCOV_PATH)
MESSAGE(FATAL_ERROR "gcov not found! Aborting...")
ENDIF() # NOT GCOV_PATH
IF(NOT CMAKE_COMPILER_IS_GNUCXX)
IF(NOT "${CMAKE_CXX_COMPILER_ID}" MATCHES ".*Clang")
MESSAGE(FATAL_ERROR "Compiler is not GNU gcc or Clang! Aborting...")
ENDIF()
ENDIF() # NOT CMAKE_COMPILER_IS_GNUCXX
SET(CMAKE_CXX_FLAGS_COVERAGE
"-g -O0 -fprofile-arcs -ftest-coverage"
CACHE STRING "Flags used by the C++ compiler during coverage builds."
FORCE )
SET(CMAKE_C_FLAGS_COVERAGE
"-g -O0 -fprofile-arcs -ftest-coverage"
CACHE STRING "Flags used by the C compiler during coverage builds."
FORCE )
SET(CMAKE_EXE_LINKER_FLAGS_COVERAGE
""
CACHE STRING "Flags used for linking binaries during coverage builds."
FORCE )
SET(CMAKE_SHARED_LINKER_FLAGS_COVERAGE
""
CACHE STRING "Flags used by the shared libraries linker during coverage builds."
FORCE )
MARK_AS_ADVANCED(
CMAKE_CXX_FLAGS_COVERAGE
CMAKE_C_FLAGS_COVERAGE
CMAKE_EXE_LINKER_FLAGS_COVERAGE
CMAKE_SHARED_LINKER_FLAGS_COVERAGE )
# If unwanted files are included in the coverage reports, you can
# adjust the exclude patterns on line 83.
SETUP_TARGET_FOR_COVERAGE(
coverage # Name for custom target.
${TEST_MAIN} # Name of the test driver executable that runs the tests.
# NOTE! This should always have a ZERO as exit code
# otherwise the coverage generation will not complete.
coverage_out # Name of output directory.
)
else()
add_custom_target(coverage
COMMAND echo "${Red}Code coverage only available in coverage builds."
COMMAND echo "${Green}Make a new build directory and rerun cmake with -DCMAKE_BUILD_TYPE=Coverage to enable this target.${ColorReset}"
)
endif()
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