portersky
8df5eaa4e8
AppleClang ships llvm-cov inside Xcode and it is not on PATH, so find_program fails. Use xcrun llvm-cov gcov via a wrapper script instead.
57 lines
2.6 KiB
CMake
57 lines
2.6 KiB
CMake
# ==============================================================================
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# Coverage
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# ==============================================================================
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# gcov-based coverage via --coverage, reported by gcovr.
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# Works with GCC and Clang on Linux and macOS out of the box.
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# Windows requires GCC (e.g. MinGW via scoop install gcc) or a Clang build
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# that includes compiler-rt (clang_rt.profile).
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#
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# Requires: gcovr on PATH (install via: uv tool install gcovr)
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# Usage: cmake -DENABLE_COVERAGE=ON ... then ninja coverage
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# Report: build/coverage/index.html
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# ==============================================================================
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option(ENABLE_COVERAGE "Build with coverage instrumentation" OFF)
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if (ENABLE_COVERAGE)
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if (NOT CMAKE_C_COMPILER_ID MATCHES "GNU|Clang")
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message(FATAL_ERROR "ENABLE_COVERAGE requires GCC or Clang")
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endif()
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find_program(GCOVR_EXE gcovr REQUIRED)
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if (CMAKE_C_COMPILER_ID MATCHES "Clang")
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# gcovr needs a single-token gcov executable. Wrap llvm-cov gcov in a
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# script placed in the build dir (guaranteed no spaces in path).
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# AppleClang ships llvm-cov inside Xcode, reached only via xcrun.
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if (WIN32)
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find_program(LLVM_COV_EXE llvm-cov REQUIRED)
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set(GCOV_EXECUTABLE "${CMAKE_BINARY_DIR}/llvm-gcov.bat")
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file(WRITE "${GCOV_EXECUTABLE}" "@echo off\r\n\"${LLVM_COV_EXE}\" gcov %*\r\n")
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elseif (CMAKE_C_COMPILER_ID STREQUAL "AppleClang")
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find_program(XCRUN_EXE xcrun REQUIRED)
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set(GCOV_EXECUTABLE "${CMAKE_BINARY_DIR}/llvm-gcov.sh")
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file(WRITE "${GCOV_EXECUTABLE}" "#!/bin/sh\nexec xcrun llvm-cov gcov \"$@\"\n")
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file(CHMOD "${GCOV_EXECUTABLE}"
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PERMISSIONS OWNER_READ OWNER_WRITE OWNER_EXECUTE
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GROUP_READ GROUP_EXECUTE
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WORLD_READ WORLD_EXECUTE)
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else()
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find_program(LLVM_COV_EXE llvm-cov REQUIRED)
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set(GCOV_EXECUTABLE "${CMAKE_BINARY_DIR}/llvm-gcov.sh")
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file(WRITE "${GCOV_EXECUTABLE}" "#!/bin/sh\nexec \"${LLVM_COV_EXE}\" gcov \"$@\"\n")
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file(CHMOD "${GCOV_EXECUTABLE}"
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PERMISSIONS OWNER_READ OWNER_WRITE OWNER_EXECUTE
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GROUP_READ GROUP_EXECUTE
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WORLD_READ WORLD_EXECUTE)
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endif()
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message(STATUS "Coverage: enabled (gcovr: ${GCOVR_EXE}, gcov: llvm-cov gcov)")
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else()
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set(GCOV_EXECUTABLE "gcov")
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message(STATUS "Coverage: enabled (gcovr: ${GCOVR_EXE})")
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endif()
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add_compile_options(--coverage -O0 -g)
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add_link_options(--coverage)
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endif()
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