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# Copyright (c) 2012 - 2017, Lars Bilke
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without modification,
# are permitted provided that the following conditions are met:
#
# 1. Redistributions of source code must retain the above copyright notice, this
# list of conditions and the following disclaimer.
#
# 2. Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions and the following disclaimer in the documentation
# and/or other materials provided with the distribution.
#
# 3. Neither the name of the copyright holder nor the names of its contributors
# may be used to endorse or promote products derived from this software without
# specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
# ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
# ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
# CHANGES:
#
# 2012-01-31, Lars Bilke
# - Enable Code Coverage
#
# 2013-09-17, Joakim Söderberg
# - Added support for Clang.
# - Some additional usage instructions.
#
# 2016-02-03, Lars Bilke
# - Refactored functions to use named parameters
#
# 2017-06-02, Lars Bilke
# - Merged with modified version from github.com/ufz/ogs
#
#
# USAGE:
#
# 1. Copy this file into your cmake modules path.
#
# 2. Add the following line to your CMakeLists.txt:
# include(CodeCoverage)
#
# 3. Append necessary compiler flags:
# APPEND_COVERAGE_COMPILER_FLAGS()
#
# 4. If you need to exclude additional directories from the report, specify them
# using the COVERAGE_EXCLUDES variable before calling SETUP_TARGET_FOR_COVERAGE.
# Example:
# set(COVERAGE_EXCLUDES 'dir1/*' 'dir2/*')
#
# 5. Use the functions described below to create a custom make target which
# runs your test executable and produces a code coverage report.
#
# 6. Build a Debug build:
# cmake -DCMAKE_BUILD_TYPE=Debug ..
# make
# make my_coverage_target
#
include(CMakeParseArguments)
# Check prereqs
find_program( GCOV_PATH gcov )
find_program( LCOV_PATH lcov )
find_program( GENHTML_PATH genhtml )
find_program( SIMPLE_PYTHON_EXECUTABLE python )
if(NOT GCOV_PATH)
message(FATAL_ERROR "gcov not found! Aborting...")
endif() # NOT GCOV_PATH
if("${CMAKE_CXX_COMPILER_ID}" MATCHES "(Apple)?[Cc]lang")
if("${CMAKE_CXX_COMPILER_VERSION}" VERSION_LESS 3)
message(FATAL_ERROR "Clang version must be 3.0.0 or greater! Aborting...")
endif()
list(APPEND COVERAGE_COMPILER_FLAGS -Qunused-arguments)
elseif(NOT CMAKE_COMPILER_IS_GNUCXX)
message(FATAL_ERROR "Compiler is not GNU gcc! Aborting...")
endif()
list(APPEND COVERAGE_COMPILER_FLAGS
-g -O0 --coverage -fprofile-arcs -ftest-coverage)
set(COVERAGE_COMPILER_FLAGS ${COVERAGE_COMPILER_FLAGS} CACHE INTERNAL "")
set(CMAKE_CXX_FLAGS_COVERAGE
${COVERAGE_COMPILER_FLAGS}
CACHE STRING "Flags used by the C++ compiler during coverage builds."
FORCE )
set(CMAKE_C_FLAGS_COVERAGE
${COVERAGE_COMPILER_FLAGS}
CACHE STRING "Flags used by the C compiler during coverage builds."
FORCE )
set(CMAKE_EXE_LINKER_FLAGS_COVERAGE
""
CACHE STRING "Flags used for linking binaries during coverage builds."
FORCE )
set(CMAKE_SHARED_LINKER_FLAGS_COVERAGE
""
CACHE STRING "Flags used by the shared libraries linker during coverage builds."
FORCE )
mark_as_advanced(
CMAKE_CXX_FLAGS_COVERAGE
CMAKE_C_FLAGS_COVERAGE
CMAKE_EXE_LINKER_FLAGS_COVERAGE
CMAKE_SHARED_LINKER_FLAGS_COVERAGE )
if(NOT CMAKE_BUILD_TYPE STREQUAL "Debug")
message(WARNING "Code coverage results with an optimised (non-Debug) build may be misleading")
endif() # NOT CMAKE_BUILD_TYPE STREQUAL "Debug"
if(CMAKE_C_COMPILER_ID STREQUAL "GNU")
link_libraries(gcov)
else()
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} --coverage")
endif()
# Defines a target for running and collection code coverage information
# Builds dependencies, runs the given executable and outputs reports.
# NOTE! The executable should always have a ZERO as exit code otherwise
# the coverage generation will not complete.
#
# setup_target_for_coverage(
# NAME testrunner_coverage # New target name
# EXECUTABLE testrunner -j ${PROCESSOR_COUNT} # Executable in PROJECT_BINARY_DIR
# DEPENDENCIES testrunner # Dependencies to build first
# )
function(setup_target_for_coverage)
set(options NONE)
set(oneValueArgs NAME)
set(multiValueArgs EXECUTABLE EXECUTABLE_ARGS DEPENDENCIES)
cmake_parse_arguments(Coverage "${options}" "${oneValueArgs}" "${multiValueArgs}" ${ARGN})
if(NOT LCOV_PATH)
message(FATAL_ERROR "lcov not found! Aborting...")
endif() # NOT LCOV_PATH
if(NOT GENHTML_PATH)
message(FATAL_ERROR "genhtml not found! Aborting...")
endif() # NOT GENHTML_PATH
# Setup target
add_custom_target(${Coverage_NAME}
# Cleanup lcov
COMMAND ${LCOV_PATH} --directory . --zerocounters
# Run tests
COMMAND ${Coverage_EXECUTABLE}
# Capturing lcov counters and generating report
COMMAND ${LCOV_PATH} --base-directory ${CMAKE_SOURCE_DIR} --directory . --capture --output-file ${Coverage_NAME}.info --no-external
COMMAND ${LCOV_PATH} --remove ${Coverage_NAME}.info ${COVERAGE_EXCLUDES} --output-file ${Coverage_NAME}.info.cleaned
COMMAND ${GENHTML_PATH} --legend --demangle-cpp -o ${Coverage_NAME} ${Coverage_NAME}.info.cleaned
COMMAND ${CMAKE_COMMAND} -E rename ${Coverage_NAME}.info.cleaned coverage.info
COMMAND ${CMAKE_COMMAND} -E remove ${Coverage_NAME}.info
WORKING_DIRECTORY ${PROJECT_BINARY_DIR}
DEPENDS ${Coverage_DEPENDENCIES}
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 ${Coverage_NAME} POST_BUILD
COMMAND ;
COMMENT "Open ./${Coverage_NAME}/index.html in your browser to view the coverage report."
)
endfunction() # setup_target_for_coverage
function(append_coverage_compiler_flags flags_var)
set(${flags_var} ${${flags_var}} ${COVERAGE_COMPILER_FLAGS} PARENT_SCOPE)
endfunction() # append_coverage_compiler_flags
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