llvm dev - Mar 2017 - Building the CRT

Folks,

I'm at a loss trying to add Compiler-RT to an LLVM build, even after 
checking out the instructions at http://compiler-rt.llvm.org, so I'd 
appreciate your help.

I've tried adding the CMake options LLVM_ENABLE_PROJECTS, 
LLVM_BUILD_EXTERNAL_COMPILER_RT, LLVM_EXTERNAL_COMPILER_RT_SOURCE_DIR, 
CLANG_DEFAULT_RTLIB.  All to no avail.

FWIW, I'm building for the targets AArch64, ARM and X86.

Feeling like a newbie makes me want to cry... :-}

Thank you,


-- 
Evandro Menezes

On 3/20/17 1:47 PM, Evandro Menezes via llvm-dev wrote:
> Folks,
>
> I'm at a loss trying to add Compiler-RT to an LLVM build, even after
> checking out the instructions at http://compiler-rt.llvm.org, so I'd
> appreciate your help.
>
> I've tried adding the CMake options LLVM_ENABLE_PROJECTS,
> LLVM_BUILD_EXTERNAL_COMPILER_RT, LLVM_EXTERNAL_COMPILER_RT_SOURCE_DIR,
> CLANG_DEFAULT_RTLIB.  All to no avail.
You'll need to give a lot more details on what you tried, and how it 
failed. Without that information, nobody can really help you.


Jon
>
> FWIW, I'm building for the targets AArch64, ARM and X86.
>
> Feeling like a newbie makes me want to cry... :-}
>
> Thank you,
>
>
-- 
Jon Roelofs
jonathan at codesourcery.com
CodeSourcery / Mentor Embedded

Shot in the dark: double-check that your checkout is under llvm/projects or
llvm/runtimes, and wipe your cmake cache before attempting a rebuild.

vedant
> On Mar 20, 2017, at 12:47 PM, Evandro Menezes via llvm-dev <llvm-dev at
lists.llvm.org> wrote:
> 
> Folks,
> 
> I'm at a loss trying to add Compiler-RT to an LLVM build, even after
checking out the instructions at http://compiler-rt.llvm.org, so I'd
appreciate your help.
> 
> I've tried adding the CMake options LLVM_ENABLE_PROJECTS,
LLVM_BUILD_EXTERNAL_COMPILER_RT, LLVM_EXTERNAL_COMPILER_RT_SOURCE_DIR,
CLANG_DEFAULT_RTLIB.  All to no avail.
> 
> FWIW, I'm building for the targets AArch64, ARM and X86.
> 
> Feeling like a newbie makes me want to cry... :-}
> 
> Thank you,
> 
> 
> -- 
> Evandro Menezes
> 
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev

On 03/20/2017 03:33 PM, Jonathan Roelofs wrote:
> On 3/20/17 1:47 PM, Evandro Menezes via llvm-dev wrote:
>> Folks,
>>
>> I'm at a loss trying to add Compiler-RT to an LLVM build, even
after
>> checking out the instructions at http://compiler-rt.llvm.org, so
I'd
>> appreciate your help.
>>
>> I've tried adding the CMake options LLVM_ENABLE_PROJECTS,
>> LLVM_BUILD_EXTERNAL_COMPILER_RT, LLVM_EXTERNAL_COMPILER_RT_SOURCE_DIR,
>> CLANG_DEFAULT_RTLIB.  All to no avail.
>
> You'll need to give a lot more details on what you tried, and how it 
> failed. Without that information, nobody can really help you.
OK, what else can I say?

I checked out the projects side by side, as I usually do:

    ~/src/llvm.tip $ ls
    clang              compiler-rt  klee    libcxx     lld   llvm
    clang-tools-extra  dragonegg    libclc  libcxxabi  lldb  polly

So I expected that setting LLVM_ENABLE_PROJECTS="clang;compiler-rt" 
would be enough to get Compiler-RT added to a functional build tree, 
since setting it to just "clang" does result in Clang being built.  I 
tired the other variables above for good measure, alas unsuccessfully.

In the end, everything gets built as before, except for Compiler-RT, 
which I expect to be any built-in and sanitizer libraries.

Thank you,

-- 
Evandro Menezes

> On Mar 20, 2017, at 12:47 PM, Evandro Menezes via llvm-dev <llvm-dev at
lists.llvm.org> wrote:
> 
> Folks,
> 
> I'm at a loss trying to add Compiler-RT to an LLVM build, even after
checking out the instructions at http://compiler-rt.llvm.org, so I'd
appreciate your help.
> 
> I've tried adding the CMake options LLVM_ENABLE_PROJECTS
For this option, you need to follow:
http://llvm.org/docs/GettingStarted.html#for-developers-to-work-with-a-git-monorepo
<http://llvm.org/docs/GettingStarted.html#for-developers-to-work-with-a-git-monorepo>

You can’t add this to an existing build directory, you need to wipe it and
re-run cmake (at least for me that’s the only way I found).

— 
Mehdi


> , LLVM_BUILD_EXTERNAL_COMPILER_RT, LLVM_EXTERNAL_COMPILER_RT_SOURCE_DIR,
CLANG_DEFAULT_RTLIB.  All to no avail.
> 
> FWIW, I'm building for the targets AArch64, ARM and X86.
> 
> Feeling like a newbie makes me want to cry... :-}
> 
> Thank you,
> 
> 
> -- 
> Evandro Menezes
> 
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
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On 03/20/2017 04:37 PM, Mehdi Amini wrote:
>
>> On Mar 20, 2017, at 12:47 PM, Evandro Menezes via llvm-dev 
>> <llvm-dev at lists.llvm.org <mailto:llvm-dev at
lists.llvm.org>> wrote:
>>
>> Folks,
>>
>> I'm at a loss trying to add Compiler-RT to an LLVM build, even
after
>> checking out the instructions at http://compiler-rt.llvm.org, so
I'd
>> appreciate your help.
>>
>> I've tried adding the CMake options LLVM_ENABLE_PROJECTS
>
> For this option, you need to follow: 
>
http://llvm.org/docs/GettingStarted.html#for-developers-to-work-with-a-git-monorepo
>
> You can’t add this to an existing build directory, you need to wipe it 
> and re-run cmake (at least for me that’s the only way I found).
Yes, I have a monorepo, that's why I have projects that I don't care 
about cloned (e.g., draggonegg).  But, as I said, this configuration has 
worked fine, until I decided to do some work in CRT.

And, yes, I tried starting a build from a clean directory. Yet...

Thank you,


-- 
Evandro Menezes