[llvm-dev] Building LLVM with VisualStudio 2017 (original) (raw)

Gaier, Bjoern via llvm-dev llvm-dev at lists.llvm.org
Sun Oct 28 23:48:09 PDT 2018

Hey Stella,

(Gaier is my last name :0)

I do the same steps as you do! The resulting Clang compiler is indeed working. I have problems with the LLVM library.

When I build the LLVM7 I use the libraries of it in a different project - a JIT client. When I compile this solution with Visual Studio 2017 and the MSVC compiler, then I get no problems.

But, when I switch to the Clang-cl compiler in Visual Studio 2017, then I get suddenly these undefined references. The strange thing is, that this also happens when I compile the LLVM with a preinstalled Clang.

Kind greetings Björn

-----Original Message----- From: Stella Stamenova <stilis at microsoft.com> Sent: Freitag, 26. Oktober 2018 21:02 To: Gaier, Bjoern <Bjoern.Gaier at horiba.com>; Dennis Luehring <dl.soluz at gmx.net> Subject: RE: [llvm-dev] Building LLVM with VisualStudio 2017

Hey Gaier,

Can you give a few more details on your scenario? We use build LLVM with VS 2017 and we can successfully compile programs with clang afterwards.

At a high level, what we do is:

  1. Call Cmake to generate VS2017 Solution
  2. Build the solution
  3. Now use clang to compile other programs

Thanks, -Stella

-----Original Message----- From: llvm-dev <llvm-dev-bounces at lists.llvm.org> On Behalf Of Gaier, Bjoern via llvm-dev Sent: Friday, October 26, 2018 2:52 AM To: Dennis Luehring <dl.soluz at gmx.net> Cc: llvm-dev <llvm-dev at lists.llvm.org> Subject: Re: [llvm-dev] Building LLVM with VisualStudio 2017

But building the LLVM and Clang is no problem at all. The problem occurs when I use the generated LLVM lib files in a project, which I compile with Clang.

-----Original Message----- From: llvm-dev <llvm-dev-bounces at lists.llvm.org> On Behalf Of Dennis Luehring via llvm-dev Sent: Freitag, 26. Oktober 2018 11:41 To: llvm-dev at lists.llvm.org Subject: Re: [llvm-dev] Building LLVM with VisualStudio 2017

something i expirenced when i added the IRParser lib to the Fibonacci example (using cmakelists.txt) - in a clean first build

after the change i was unable to build the project (with masses of errors)

rebuilding on the console with cmake build "repaired" the sln

Am 26.10.2018 um 11:25 schrieb Gaier, Bjoern via llvm-dev:

Hello everyone,

so there is something that really bothers me. In the past I build LLVM and Clang via the source code and Visual Studio 2015. In my project I used then the freshly new build Clang and the LLVM. _But now, since I compiled with Visual Studio 2017 this is not possible anymore. I'm able to compile both, the LLVM and clang, but when I then use clang as the compiler and the LLVM in my project, I get undefined references to: "stdreversetriviallyswappable4" And other functions like this. I also tried, when CMake has generated the Solution file, to change the compiler to LLVM. Clang is executed then, but still - the same error will occur in my project or different projects when they are compiled with Clang. What am I doing wrong? It prevents me from continuing my project... Kind greetings Bj rn

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