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Diffstat (limited to 'neozip/cmake/detect-coverage.cmake')
| -rw-r--r-- | neozip/cmake/detect-coverage.cmake | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/neozip/cmake/detect-coverage.cmake b/neozip/cmake/detect-coverage.cmake new file mode 100644 index 0000000000..ff993cf9ff --- /dev/null +++ b/neozip/cmake/detect-coverage.cmake @@ -0,0 +1,50 @@ +# detect-coverage.cmake -- Detect supported compiler coverage flags +# Licensed under the Zlib license, see LICENSE.md for details + +# Attempt to enable gcov-style code coverage +macro(add_code_coverage) + # Check for --coverage flag support + set(CMAKE_REQUIRED_LINK_OPTIONS -coverage) + check_c_compiler_flag("--coverage" HAVE_COVERAGE) + set(CMAKE_REQUIRED_LINK_OPTIONS) + if(HAVE_COVERAGE) + # Check for --coverage -fcondition-coverage flag support + set(CMAKE_REQUIRED_LINK_OPTIONS -coverage -fcondition-coverage) + check_c_compiler_flag("--coverage -fcondition-coverage -Wno-coverage-too-many-conditions" HAVE_CONDITION_COVERAGE) + set(CMAKE_REQUIRED_LINK_OPTIONS) + + if(HAVE_CONDITION_COVERAGE) + # Both --coverage and -fcondition-coverage supported + add_link_options(-coverage -fcondition-coverage) + add_compile_options(--coverage -fcondition-coverage -Wno-coverage-too-many-conditions) + message(STATUS "Code coverage enabled using: --coverage -fcondition-coverage") + else() + # Only --coverage supported. + add_link_options(-coverage) + add_compile_options(--coverage) + message(STATUS "Code coverage enabled using: --coverage") + endif() + else() + # Some versions of GCC don't support --coverage shorthand + set(CMAKE_REQUIRED_LINK_OPTIONS -lgcov -fprofile-arcs) + check_c_compiler_flag("-ftest-coverage -fprofile-arcs" HAVE_TEST_COVERAGE) + set(CMAKE_REQUIRED_LINK_OPTIONS) + + if(HAVE_TEST_COVERAGE) + add_link_options(-lgcov -fprofile-arcs) + add_compile_options(-ftest-coverage -fprofile-arcs) + message(STATUS "Code coverage enabled using: -ftest-coverage -fprofile-arcs") + else() + # Failed to enable coverage, this is fatal to avoid silent failures in CI + message(FATAL_ERROR "WITH_CODE_COVERAGE requested, but unable to turn on code coverage with compiler/linker") + 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 "${CMAKE_C_FLAGS} -O0") + set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -O0") + endif() +endmacro() |