在 CMake 中启用 UB 清理的惯用方法是什么？-解网

问：

我想为我的一个存储库构建一个测试程序，其中启用了未定义的行为清理（至少使用 GCC 和 clang）。我知道如何手动执行此操作：

添加到编译标志-fsanitize=undefined
添加到链接标志-lubsan
确保安装了适当版本的。libubsan

现在，在 CMake 中，我希望像这样的东西可以工作：

find_package(ubsan)
if (CMAKE_CXX_COMPILER_ID STREQUAL "GNU"   OR
    CMAKE_CXX_COMPILER_ID STREQUAL "Clang" )
    target_compile_options(my_test PRIVATE "-fsanitize=undefined")
endif()

target_link_libraries(ubsan::ubsan)

...但是没有这样的版本（从 CMake 3.21.0-rc2 开始）。那么，我应该怎么做呢？从某个地方获取 FindUBSan.cmake？也许做点别的事情？

PS - 这个问题同样适用于 C

GCC cmake clang 成语 ubsan

alex@alex-ubuntu:~/test$ tree
.
├── CMakeLists.txt
├── main.cpp
└── ubsan.cmake

0 directories, 3 files

alex@alex-ubuntu:~/test$ cat CMakeLists.txt 
cmake_minimum_required(VERSION 3.21)
project(test)

add_executable(main main.cpp)

alex@alex-ubuntu:~/test$ cat main.cpp 
int main () { return 0; }

alex@alex-ubuntu:~/test$ cat ubsan.cmake 
set(CMAKE_C_FLAGS_INIT "-fsanitize=undefined")
set(CMAKE_CXX_FLAGS_INIT "-fsanitize=undefined")

alex@alex-ubuntu:~/test$ cmake -G Ninja -S . -B build --toolchain ubsan.cmake 
-- The C compiler identification is GNU 9.3.0
-- The CXX compiler identification is GNU 9.3.0
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /usr/bin/cc - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/c++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Configuring done
-- Generating done
-- Build files have been written to: /home/alex/test/build

alex@alex-ubuntu:~/test$ cmake --build build/ -- -v
[1/2] /usr/bin/c++   -fsanitize=undefined -MD -MT CMakeFiles/main.dir/main.cpp.o -MF CMakeFiles/main.dir/main.cpp.o.d -o CMakeFiles/main.dir/main.cpp.o -c /home/alex/test/main.cpp
[2/2] : && /usr/bin/c++ -fsanitize=undefined  CMakeFiles/main.dir/main.cpp.o -o main   && :

alex@alex-ubuntu:~/test$ ldd build/main 
    linux-vdso.so.1 (0x00007ffc9dd75000)
    libubsan.so.1 => /lib/x86_64-linux-gnu/libubsan.so.1 (0x00007f79a4b52000)
    libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f79a4960000)
    libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f79a495a000)
    libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007f79a4937000)
    libstdc++.so.6 => /lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007f79a4755000)
    libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007f79a4738000)
    /lib64/ld-linux-x86-64.so.2 (0x00007f79a550a000)
    libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f79a45e9000)

在 CMake 中启用 UB 清理的惯用方法是什么？

What's the idiomatic way of enabling UB sanitization in CMake?

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