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# detect-coverage.cmake -- Detect supported compiler coverage flags
# Licensed under the Zlib license, see LICENSE.md for details
macro(add_code_coverage)
# Check for -coverage flag support for Clang/GCC
if(CMAKE_VERSION VERSION_LESS 3.14)
set(CMAKE_REQUIRED_LIBRARIES -lgcov)
else()
set(CMAKE_REQUIRED_LINK_OPTIONS -coverage)
endif()
check_c_compiler_flag(-coverage HAVE_COVERAGE)
set(CMAKE_REQUIRED_LIBRARIES)
set(CMAKE_REQUIRED_LINK_OPTIONS)
if(HAVE_COVERAGE)
add_compile_options(-coverage)
add_link_options(-coverage)
message(STATUS "Code coverage enabled using: -coverage")
else()
# Some versions of GCC don't support -coverage shorthand
if(CMAKE_VERSION VERSION_LESS 3.14)
set(CMAKE_REQUIRED_LIBRARIES -lgcov)
else()
set(CMAKE_REQUIRED_LINK_OPTIONS -lgcov -fprofile-arcs)
endif()
check_c_compiler_flag("-ftest-coverage -fprofile-arcs -fprofile-values" HAVE_TEST_COVERAGE)
set(CMAKE_REQUIRED_LIBRARIES)
set(CMAKE_REQUIRED_LINK_OPTIONS)
if(HAVE_TEST_COVERAGE)
add_compile_options(-ftest-coverage -fprofile-arcs -fprofile-values)
add_link_options(-lgcov -fprofile-arcs)
message(STATUS "Code coverage enabled using: -ftest-coverage")
else()
message(WARNING "Compiler does not support code coverage")
set(WITH_CODE_COVERAGE OFF)
endif()
endif()
# Set optimization level to zero for code coverage builds
if (WITH_CODE_COVERAGE)
# Use CMake compiler flag variables due to add_compile_options failure on Windows GCC
set(CMAKE_C_FLAGS "-O0 ${CMAKE_C_FLAGS}")
set(CMAKE_CXX_FLAGS "-O0 ${CMAKE_CXX_FLAGS}")
endif()
endmacro()
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