Clang linking problems

I'm trying to run clang(clang-tidy) on my cpp files. And I get errors like: main.cpp:1:10: fatal error: 'iostream' file not found

I searched problem in the Internet, but couldn't find solution. https://clang.llvm.org/get_started.html I used this guide to download llvm and clang. I tried to link my headers with -DGCC_INSTALL_PREFIX and -stdlib option but It didn't work.

clang -v on Ubuntu: clang version 9.0.0-2 (tags/RELEASE_900/final) Target: x86_64-pc-linux-gnu Thread model: posix InstalledDir: /usr/bin Found candidate GCC installation: /usr/bin/../lib/gcc/i686-linux-gnu/9 Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/8 Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/9 Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/9 Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/8 Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/9 Selected GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/9 Candidate multilib: .;@m64 Selected multilib: .;@m64