Run the first chapter on a mac

[Alexis-benoist]

Hello,

I don't know if it's the good place to ask, so if I'm wrong don't be mad just tell me :)
I'm running OSX.
I installed llvm using brew and I compiled the first functions using llc.
Now I have a test.s and I don't know how to run it.

I tried the command gcc test.s -o hello.native and I have now the error:
test.s:2:2: error: unknown directive
.macosx_version_min 14, 1

Does anyone knows why?
Thanks

[tiye]

Same here:

➤➤ cc hello.s -o hello.native
hello.s:2:2: error: unknown directive
 .macosx_version_min 14, 0
 ^

First 4 lines of hello.s:

    .section    __TEXT,__text,regular,pure_instructions
    .macosx_version_min 14, 0
    .globl  _add
    .align  4, 0x90

And after I removed that line .macosx_version_min 14, 0compilation just passed.

[sdiehl]

I have not used LLVM on a Mac before, so if there is any advice about how to change the wording so that it's Linux and Mac agnostic the Markdown is here and pretty quick to change: https://github.com/sdiehl/kaleidoscope/blob/master/tutorial.md#llvm-introduction

[hellerve]

The problem is that GCC does not know about the macosx_version_min directive. Clang does. So, if you have gcc installed as your default for gcc or cc, you have to call clang explicitly.

A more serious problem is that on OS X, the current LLVM system default and the version provided by Homebrew are 3.6.0, which has no Haskell bindings yet.

[ayberkt]

If you're using brew, you can install LLVM 3.4 by brew install llvm34. This will install all llvm commands with the -3.4 ending e.g. llvm-config-3.4 for llvm-config. Aliasing llvm-config to llvm-config-3.4 was enough of a hack for me to be able to build llvm-general and llvm-general-pure. But I have still not run the cabal project for myself so I don't know if I will face any other problems.

[doersino]

EDIT: The below is outdated. Simply follow the setup instructions in README.md.

---

For future visitors: Old versions of Homebrew packages are now maintained here, so in order to install LLVM 3.5 and set up the Kaleidoscope tutorial, perform the following steps (tested on OS X El Cap):

brew tap homebrew/versions
brew install llvm35
brew install libffi  # the version provided in OS X El Cap is too outdated
cabal sandbox init
cabal configure  # or cabal configure --flags=tutorial, see README.md
alias llvm-config='llvm-config-3.5'  # see comment by @ayberkt
cabal install llvm-general-3.5.1.2 --extra-lib-dirs /usr/local/opt/libffi/lib/  # more recent 3.5.*.* versions might work too
cabal install --only-dependencies