[llvm-dev] Building lld

[Josh Sharp via llvm-dev]

I tried to build lld by following these steps: https://lld.llvm.org/getting_started.html

But after 'make install' I can't find lld anywhere and 'make check-lld' results in this message:

make: *** No rule to make target 'check-lld'.  Stop.

Any idea?

[Rui Ueyama via llvm-dev]

lld is installed as ld.lld, so please look for ld.lld.

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[Josh Sharp via llvm-dev]

I tried deleting my build directory and restarting from scratch

$ cd llvm-project
$ mkdir build && cd build
$ cmake -G "Unix Makefiles" -DLLVM_ENABLE_PROJECTS=lld ../llvm
$ make

I got this error:

make[2]: *** No rule to make target 'llvm/cmake/modules/GenerateVersionFromVCS.cmake', needed by 'tools/lld/Common/VCSVersion.inc'.  Stop.

CMakeFiles/Makefile2:57166: recipe for target 'tools/lld/Common/CMakeFiles/lldCommon.dir/all' failed

make[1]: *** [tools/lld/Common/CMakeFiles/lldCommon.dir/all] Error 2

Makefile:151: recipe for target 'all' failed

Any idea?

---

From: Rui Ueyama <ru...@google.com>
Sent: Wednesday, March 13, 2019 12:49 PM
To: Josh Sharp
Cc: via llvm-dev
Subject: Re: [llvm-dev] Building lld

 

[Shoaib Meenai via llvm-dev]

Hmm … does the file llvm-project/llvm/cmake/modules/GenerateVersionFromVCS.cmake exist? Can you `git pull`, and does `git status` show any changes?

[Zachary Turner via llvm-dev]

Judging by this path:

needed by 'tools/lld/Common/VCSVersion.inc'  

It looks to me like this is **not** a monorepo layout (if it were, lld would not appear in the tools directory).  Therefore the LLVM_ENABLE_PROJECTS=lld is not even doing anything.

I don't know how to build without a monorepo these days, and I also don't know what the most recent guidance setting up a monorepo is, but maybe someone else can chime in.

[Josh Sharp via llvm-dev]

The way I'm having it set up, inside my llvm-project directory, there are 3 sub-directories at the same level: llvm, build and lld

---

From: Zachary Turner <ztu...@google.com>
Sent: Wednesday, March 20, 2019 10:38 AM
To: Shoaib Meenai
Cc: Josh Sharp; Rui Ueyama; via llvm-dev

[Zachary Turner via llvm-dev]

What URL did you clone from?

[Rui Ueyama via llvm-dev]

Did you follow the instruction on https://lld.llvm.org/getting_started.html? I mean is this what you typed in?

$ git clone https://github.com/llvm/llvm-project.git

$ cd llvm-project

$ mkdir build && cd build

$ cmake -G "Unix Makefiles" -DLLVM_ENABLE_PROJECTS=lld ../llvm

$ make

On Wed, Mar 20, 2019 at 10:52 AM Josh Sharp <mm9...@hotmail.com> wrote: