当然，外部构建是Unix makefile的首选方法，但如果您使用的是其他生成器，如Eclipse CDT，它更喜欢您构建内源。在这种情况下，您需要手动清除CMake文件。试试这个:

find . -name 'CMakeCache.txt' -o -name '*.cmake' -o -name 'Makefile' -o -name 'CMakeFiles' -exec rm -rf {} +

或者，如果你已经通过shop -s globstar启用了globstar，试试这个不那么恶心的方法:

rm -rf **/CMakeCache.txt **/*.cmake **/Makefile **/CMakeFiles

在Git无处不在的今天，你可能会忘记CMake，而使用Git clean -d -f -x，这将删除所有不在源代码控制下的文件。

也许它有点过时，但由于这是你谷歌cmake clean时的第一个热门，我将添加这个:

因为您可以使用指定的目标在生成目录中启动生成

Cmake——构建。——目标xyz

你当然可以跑

Cmake——构建。——目标清洁

在生成的构建文件中运行干净目标。

cmake主要生成一个Makefile文件，可以将rm添加到干净的PHONY文件中。

例如,

[root@localhost hello]# ls
CMakeCache.txt  CMakeFiles  cmake_install.cmake  CMakeLists.txt  hello  Makefile  test
[root@localhost hello]# vi Makefile
clean:
        $(MAKE) -f CMakeFiles/Makefile2 clean
        rm   -rf   *.o   *~   .depend   .*.cmd   *.mod    *.ko   *.mod.c   .tmp_versions *.symvers *.d *.markers *.order   CMakeFiles  cmake_install.cmake  CMakeCache.txt  Makefile

当你在生成build文件时将-D参数传递给CMake，并且不想删除整个build/目录时:

简单地删除构建目录中的CMakeFiles/目录。

rm -rf CMakeFiles/
cmake --build .

这将导致CMake重新运行，并重新生成构建系统文件。您的构建也将从头开始。

CMake官方常见问题解答说明:

Some build trees created with GNU autotools have a "make distclean" target that cleans the build and also removes Makefiles and other parts of the generated build system. CMake does not generate a "make distclean" target because CMakeLists.txt files can run scripts and arbitrary commands; CMake has no way of tracking exactly which files are generated as part of running CMake. Providing a distclean target would give users the false impression that it would work as expected. (CMake does generate a "make clean" target to remove files generated by the compiler and linker.) A "make distclean" target is only necessary if the user performs an in-source build. CMake supports in-source builds, but we strongly encourage users to adopt the notion of an out-of-source build. Using a build tree that is separate from the source tree will prevent CMake from generating any files in the source tree. Because CMake does not change the source tree, there is no need for a distclean target. One can start a fresh build by deleting the build tree or creating a separate build tree.