[cfe-dev] Compiling and running clangs unit tests

[Nikola Smiljanic]

So I have no idea what the problem is. It might be using autotools, it
might be the fact that you're installing llvm. Here's what I tried on my
Ubuntu VM.

Source from branches/release_37
llvm in ~/llvm
clang in ~/clang
inside ~/build_llvm: cmake -g Ninja -DCMAKE_BUILD_TYPE=RelWithDebInfo
../llvm
inside ~/build_llvm: ninja
inside ~/build_clang: cmake -g Ninja -DCMAKE_BUILD_TYPE=RelWithDebInfo
-DLLVM_CONFIG=~/build_llvm/bin/llvm-config ../clang
inside ~/build_clang: ninja clang-test

This works for me. I strongly suggest passing the following flags to both
cmake configure steps as it makes building much faster:

-DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++
-DCMAKE_C_FLAGS=-fuse-ld=gold -DCMAKE_CXX_FLAGS=-fuse-ld=gold

Hope this helps.

On Mon, Jul 27, 2015 at 8:40 AM, Milian Wolff <mail at milianw.de> wrote:

> Sorry Nikola,
>
> the email I wrote was written by hand and used a made up prefix. In
> reality, I
> install into the prefix you see there. Here are my CMakeCache.txt files:
>
> llvm: https://paste.kde.org/ppcx7f0hf
> clang: https://paste.kde.org/pvseix1ut
>
> Sorry for the confusion, hope this is more explicit.
>
> Bye
>
> On Monday, July 27, 2015 08:36:52 AM Nikola Smiljanic wrote:
> >    1. -- Found LLVM_CONFIG as
> >    /home/milian/projects/compiled/other/bin/llvm-config
> >
> >
> > This makes me believe your clang build is not using the llvm you just
> > built? Do you have installed version of LLVM on your distro?
> >
> > I used to build Clang out of source on Windows and you had to provide
> path
> > to LLVM but I can't see that in CMake gui anymore (on Linux). The only
> > thing I can suggest is to move clang inside llvm/tools and build in-tree.
> > That will work 100%
> >
> > On Mon, Jul 27, 2015 at 8:29 AM, Milian Wolff <mail at milianw.de> wrote:
> > > On Monday, July 27, 2015 08:25:37 AM Nikola Smiljanic wrote:
> > > > How did you configure? I'm a bit surprised by bulid/clang path. It
> looks
> > > > like you're building Clang but not LLVM?
> > >
> > > Yes, I'm building Clang.
> > >
> > > I have:
> > >
> > > ~/projects/src/llvm
> > > ~/projects/src/clang
> > > ~/projects/build/llvm
> > > ~/projects/build/clang
> > >
> > > The former two are checkouts of the release_37 branches of the
> > > corresponding
> > > git at github.com:llvm-mirror/*.git repositories. I configured them
> basically
> > > with
> > >
> > > build/llvm$ cmake ../../src/llvm -DCMAKE_BUILD_TYPE=RelWithDebInfo -
> > > DCMAKE_INSTALL_TYPE=$HOME/projects/compiled/llvm
> > >
> > > and then same for clang. Everything compiles and works just fine,
> except
> > > for
> > > the unit tests. And those are only compiled for me when I run `make
> clang-
> > > test` manually, i.e. they are not included in the "normal" make call -
> is
> > > this
> > > intended?
> > >
> > > Or does clang not support out of source builds?
> > >
> > > > On Sun, Jul 26, 2015 at 10:27 PM, Milian Wolff <mail at milianw.de>
> wrote:
> > > > > Hey all,
> > > > >
> > > > > in preparation of working on clang, I want to compile and run the
> unit
> > > > > tests,
> > > > > specifically those for the clang-c part.
> > > > >
> > > > > I read http://clang.llvm.org/hacking.html and tried to run `make
> > > > > clang-test`
> > > > > in my external build folder, but that fails at link time:
> > > > >
> > > > > https://paste.kde.org/ptylyjsa7
> > > > >
> > > > > This is using the latest versions of the release_37 branches in
> both,
> > >
> > > LLVM
> > >
> > > > > and
> > > > > clang. Could someone tell me what's going wrong here?
> > >
> > > --
> > > Milian Wolff
> > > mail at milianw.de
> > > http://milianw.de
>
> --
> Milian Wolff
> mail at milianw.de
> http://milianw.de
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/cfe-dev/attachments/20150727/00e7e2ed/attachment.html>