[Gambas-user] llvm compiling - how to (your millage may vary)

[Emil Lenngren]

Nice tutorial, but just a little note: you do not need Clang for gb.jit ;)

/Emil

2012/11/27 The Phantomgraph };8> <phantomgraph at ...626...>

> Hey All,
>
> I run Ubuntu 11.10 and I was able to get llvm compiled and
> subsequently Gambas 3-3.3.3 with the gb.jit component. I did have a
> lot of trouble, mostly figuring out how to get llvm to compile with
> the options I needed so that it would have all the stuff for Gambas...
>
> I hope I haven't forgotten any steps...
>
> 0-----=^=-----0
>
> If you have any of the packages for llvm installed first remove them
> all with yum or apt-get or whatever you use for your flavor of Linux.
> If you compiled, make uninstall and delete the llvm source directory.
>
> Next down load LLVM 3.1 from the website =>
> http://llvm.org/releases/download.html#3.1
>
> While you are at it I grabbed CLang and the Compiler RT sources.
>
> I hate screaming but : DO NOT FOLLOW THE INSTRUCTIONS IN THE
> DOCUMENTATION FOR COMPILING LLVM. IT WILL NOT WORK. The docs are
> rather old and assume you have your environment set up in a certain
> way so I had to figure it out by trial and error. Don't use symbolic
> links instead of renaming the directories and don't use their method
> of creating a build directory within the llvm directory to compile.
>
> To let you know I believe the reason why you have to do things as
> follows is because of the way the environment is set up. (Not sure,
> don't care, it works for me =)
>
> 1) Unpack LLVM 3.1 then rename the directory llvm_3.1 (You will notice
> a pattern with renaming stuff, this is part of what is wrong with the
> documentation / the environment.) If it isn't already, move the
> llvm_3.1 directory to your HOME directory aka ~/
> *NOTE: A friend of mine could only compile from ~/llvm but I used
> ~/llvm_3.1 just fine on at least 2 machines.
> 2) Unpack Clang then rename the directory clang then move the clang
> directory to ~/llvm_3.1/tools
> 3) Unpack Compiler RT then rename the directory compiler-rt then move
> the directory to ~/llvm_3.1/projects
> 4) cd to ~/llvm_3.1
> 5) Enter the following command to configure and get some coffee. :
> ./configure --enable-optimized --enable-jit --enable-shared
>     This will build llvm , Clang and the jit compiler WITH the .so
> files (shared object or dynamic libraries) you need to compile Gambas
> :)
> 6) Now you can make. To speed it up a bit use : make -j4
>     Replace the 4 with the number of processors you have in the
> machine. (I have an i5 so 4 is what I used) You may now cross your
> fingers, pray, sacrifice a chicken or what ever you normally do while
> compiling.  ;p
> 7) If everything worked out O.K. it's : make install
> 8) Test out your installation by trying this : clang --version
>    You should see the following ---
>
> clang version 3.1 (branches/release_31)
> Target: x86_64-unknown-linux-gnu
> Thread model: posix
>
>    Obviously what your looking for is the clang version Your target
> and thread model will vary depending on your system. (aka non 64 bit
> processors so on)
> 9) If it fails for some reason you can use : make clean OR make
> dist-clean and try again (I recommend starting with rm -rf /llvm_3.1 )
> 10) Now ./reconf-all Gambas and so on. (Note: you can use the make -j#
> trick with Gambas as well)
> 11) If all goes well you should have your gb-jit component.
>
> Here is a quick diagram of where things should go (I'm not putting all
> the directories in obviously.)
>
> ~/llvm_3.1/tools/clang
> ~/llvm_3.1/projects/compiler-rt
>
> Protip: The llvm sources takes up quite a bit of hard drive space on
> my lap top. Once I had it compiled and installed I b-ziped the llvm
> directory up and chucked it in a backup in case I ever need to make
> uninstall or play around with adding components to it later.
>
> Good luck, hope this works for you all! (And I haven't forgotten anything)
> :p
> --
> ------------------------------------
>  The Phantomgraph };8>
>
>
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