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build: add test coverage target

master
Andrew Kelley 2016-04-23 09:57:38 -07:00
parent 97fae8cc85
commit da406cb112
2 changed files with 38 additions and 1 deletions
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25
CMakeLists.txt
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@ -20,6 +20,8 @@ set(ZIG_LIBC_INCLUDE_DIR "/usr/include" CACHE STRING "Default native target libc
set(ZIG_LD_PATH "ld" CACHE STRING "Path to ld for the native target")
set(ZIG_DYNAMIC_LINKER "" CACHE STRING "Override dynamic linker for native target")
option(ZIG_TEST_COVERAGE "Build Zig with test coverage instrumentation" OFF)
find_package(llvm)
@ -175,10 +177,17 @@ if(MINGW)
endif()
set(EXE_CFLAGS "-std=c++11 -fno-exceptions -fno-rtti -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -D__USE_MINGW_ANSI_STDIO -Werror=strict-prototypes -Werror=old-style-definition -Werror=missing-prototypes")
set(EXE_LDFLAGS " ")
if(ZIG_TEST_COVERAGE)
set(EXE_CFLAGS "${EXE_CFLAGS} -fprofile-arcs -ftest-coverage")
set(EXE_LDFLAGS "-fprofile-arcs -ftest-coverage")
endif()
add_executable(zig ${ZIG_SOURCES})
set_target_properties(zig PROPERTIES
COMPILE_FLAGS ${EXE_CFLAGS})
COMPILE_FLAGS ${EXE_CFLAGS}
LINK_FLAGS ${EXE_LDFLAGS}
)
target_link_libraries(zig LINK_PUBLIC
${CLANG_LIBRARIES}
${LLVM_LIBRARIES}
@ -208,4 +217,18 @@ add_executable(run_tests ${TEST_SOURCES})
target_link_libraries(run_tests)
set_target_properties(run_tests PROPERTIES
COMPILE_FLAGS ${EXE_CFLAGS}
LINK_FLAGS ${EXE_LDFLAGS}
)
if (ZIG_TEST_COVERAGE)
add_custom_target(coverage
DEPENDS run_tests
WORKING_DIRECTORY ${CMAKE_BINARY_DIR}
COMMAND lcov --directory . --zerocounters --rc lcov_branch_coverage=1
COMMAND ./run_tests
COMMAND lcov --directory . --capture --output-file coverage.info --rc lcov_branch_coverage=1
COMMAND lcov --remove coverage.info '/usr/*' --output-file coverage.info.cleaned --rc lcov_branch_coverage=1
COMMAND genhtml -o coverage coverage.info.cleaned --rc lcov_branch_coverage=1
COMMAND rm coverage.info coverage.info.cleaned
)
endif()

14
README.md
View File

@ -101,6 +101,20 @@ make
sudo make install
```
### Test Coverage
To see test coverage in Zig, configure with `-DZIG_TEST_COVERAGE=ON` as an
additional parameter to the Debug build.
You must have `lcov` installed and available.
Then `make coverage`.
With GCC you will get a nice HTML view of the coverage data. With clang,
the last step will fail, but you can execute
`llvm-cov gcov $(find CMakeFiles/ -name "*.gcda")` and then inspect the
produced .gcov files.
### Troubleshooting
If you get one of these: