[llvm-dev] Building lld

[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 <zturner at google.com>
Sent: Wednesday, March 20, 2019 10:38 AM
To: Shoaib Meenai
Cc: Josh Sharp; Rui Ueyama; via llvm-dev
Subject: Re: [llvm-dev] Building lld

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.

On Tue, Mar 19, 2019 at 3:49 PM Shoaib Meenai via llvm-dev <llvm-dev at lists.llvm.org<mailto:llvm-dev at lists.llvm.org>> wrote:

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



From: llvm-dev <llvm-dev-bounces at lists.llvm.org<mailto:llvm-dev-bounces at lists.llvm.org>> on behalf of Josh Sharp via llvm-dev <llvm-dev at lists.llvm.org<mailto:llvm-dev at lists.llvm.org>>
Reply-To: Josh Sharp <mm92126 at hotmail.com<mailto:mm92126 at hotmail.com>>
Date: Tuesday, March 19, 2019 at 3:15 PM
To: Rui Ueyama <ruiu at google.com<mailto:ruiu at google.com>>
Cc: via llvm-dev <llvm-dev at lists.llvm.org<mailto:llvm-dev at lists.llvm.org>>
Subject: Re: [llvm-dev] Building lld



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 <ruiu at google.com<mailto:ruiu at google.com>>
Sent: Wednesday, March 13, 2019 12:49 PM
To: Josh Sharp
Cc: via llvm-dev
Subject: Re: [llvm-dev] Building lld



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



On Wed, Mar 13, 2019 at 11:46 AM Josh Sharp via llvm-dev <llvm-dev at lists.llvm.org<mailto:llvm-dev at lists.llvm.org>> wrote:

I tried to build lld by following these steps: https://lld.llvm.org/getting_started.html<https://urldefense.proofpoint.com/v2/url?u=https-3A__lld.llvm.org_getting-5Fstarted.html&d=DwMFAg&c=5VD0RTtNlTh3ycd41b3MUw&r=o3kDXzdBUE3ljQXKeTWOMw&m=BbNB5LANgw5u5ck9pb-IEWZkvun8wiqGkRxAVD9G8Rs&s=p5wYrYnVMXv9Q_2cVMs2rp9M_iL-WVZ8UOlNipgMaPQ&e=>



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?

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