问题
I'm trying to build the LLVM install with cmake but it is giving me an error about the LLVM_ENABLE_DIA_SDK. I managed to build LLVM before without PDB's but I am trying to get started with libclang so I need the PDB. Cmake gives me the following error:
CMake Error at cmake/config-ix.cmake:482 (message):
DIA SDK not found. If you have both VS 2012 and 2013 installed, you may
need to uninstall the former and re-install the latter afterwards.
Call Stack (most recent call first):
CMakeLists.txt:575 (include)
I have VS 2014 installed (2015 with update 3) which does have a DIA folder. Could anyone tell me how to point it to the right DIA SDK location?
回答1:
I ran into the same problem today, and Kerry Seitz's answer does work.
Actually, the environment variable VSINSTALLDIR doesn't have to be set manually -- Instead, open the Developer Command Prompt for VS. It will execute a batch script and create the VSINTALLDIR properly. Run CMake within that prompt, then everything will be OK.
回答2:
It looks like LLVM's CMake files assume an environment variable called VSINSTALLDIR.
See: https://github.com/llvm-mirror/llvm/blob/master/cmake/config-ix.cmake#L475
I'm not sure the right way to set this environment variable, but I manually created said environment variable for my user account and set it to the root of my Visual Studio install directory (e.g., C:\Program Files (x86)\Microsoft Visual Studio 14.0\). That fixed the issue for me.
Note: I included a trailing \ in the variable, but I am not sure if it is necessary.
来源：https://stackoverflow.com/questions/44481648/llvm-cmake-install-cannot-find-dia-sdk