[lldb-dev] building on mac

Todd Fiala via lldb-dev lldb-dev at lists.llvm.org
Thu Dec 17 15:18:48 PST 2015


Okay, this might be the llvm/clang build script that Xcode uses as an
llvm/clang build step.  That's going to need to be updated if it is using
configure (for the reasons I mentioned above).

So it sounds like some part of llvm or clang may be sniffing and finding
some part of ocaml, and deciding it should make some bindings for it.  I'll
have a look at the script and see if there's an obvious way to explicitly
deny it (the warning seemed like it had a way to disable that binding, so
we might just need to work it in).

Of course, if you are not using ocaml, you might want to consider
removing/hiding it if you don't need it.

Interestingly, I did have ocaml on my home system a while back and didn't
have any trouble building, but I probably had ounit2 as well, and likely
wouldn't have noticed if the Xcode-based build-llvm script ended up doing
more work when building the embedded llvm/clang during the Xcode build.

 I can probably replicate this pretty easily.

On Thu, Dec 17, 2015 at 3:10 PM, Ryan Brown <ribrdb at google.com> wrote:

> Does xcode use configure? I just push command-B.
> It does look like I have ocaml installed on my system, but I'm not sure
> how it go installed or why xcode is trying to use it.
> -- Ryan Brown
> On Thu, Dec 17, 2015 at 2:54 PM, Todd Fiala <todd.fiala at gmail.com> wrote:
>> We definitely should not be requiring ocaml :-)
>> Are you using a configure-based build?  If so, can you switch over to
>> using cmake and see if you see that same issue?  We pretty much don't
>> maintain the configure build, and it is getting stripped from llvm and
>> clang in the next version of them after 3.8, so we will not be able to
>> support configure-based builds in the near future.
>> In the event that you still see it, let us know if you have ocaml or opam
>> somewhere on your system.  The warnings do seem to indicate that ocaml was
>> specified for one reason or another?  Maybe parts of it were sniffed out
>> when trying to configure the build.
>> -Todd
>> On Thu, Dec 17, 2015 at 1:36 PM, Ryan Brown via lldb-dev <
>> lldb-dev at lists.llvm.org> wrote:
>>> Are there new prereqs for building on a mac?
>>> I just updated, and I'm getting this error:
>>> checking for __dso_handle... yes
>>> configure: WARNING: --enable-bindings=ocaml specified, but ctypes is not
>>> installed
>>> configure: WARNING: --enable-bindings=ocaml specified, but OUnit 2 is
>>> not installed. Tests will not run
>>> configure: error: Prequisites for bindings not satisfied. Fix them or
>>> use configure --disable-bindings.
>>> error: making llvm and clang child exited with value 2
>>> -- Ryan Brown
>>> _______________________________________________
>>> lldb-dev mailing list
>>> lldb-dev at lists.llvm.org
>>> http://lists.llvm.org/cgi-bin/mailman/listinfo/lldb-dev
>> --
>> -Todd

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