I recently installed LLVM and Clang on my machine running windows 7. It also has cygwin installed. I went to the following URL: http://blog.johannesmp.com/2015/09/01/installing-clang-on-windows-pt2/ and followed in instructions in Part 1 and Part 2. I installed MinGW for both 32 bits and 64 bits. However, I do not have the directory c:\mingw64 and I do not have the directory c:\mingw32. I do have a directory called c:\mingw and off of that I do have a directory mingw32. I also saved the two bat files setgcc32 and setgcc64 on the page. When I try the following command line in 32 bit mode: clang++ main.cpp -o main.exe -std=c++14 I get: c:\Rtools\gcc-4.6.3\bin\ld.exe: cannot find -lgcc_s c:\Rtools\gcc-4.6.3\bin\ld.exe: cannot find -lgcc_s clang++.exe: error: linker command failed with exit code 1 (use -v to see invocation) When I try it in 64 bit mode, I get: main.cpp:1:10: fatal error: 'stdio.h' file not found #include <stdio.h> ^ 1 error generated. What am I doing wrong? Bob