[llvm-dev] Problems trying to build LLVM

[Jack Orenstein via llvm-dev]

After much googling, I was finally able to make the DisableABI warning go
away by building the kaleidoscope tutorial's lexer and parser as follows:

clang++ -g -O3 -c kal.cpp `llvm-config --cxxflags` -o kal.o
clang++ kal.o `llvm-config --ldflags --libs` -lpthread -ltinfo -o kal

This is pure recitation of an incantation I don't understand. The
connection between the original warning, lpthread and ltinfo is unclear. In
any case, I can now continue with the Kaleidoscope tutorial.

Jack


On Wed, Jan 9, 2019 at 12:10 PM Jack Orenstein <jao at geophile.com> wrote:

> Thank you for all the responses. I am going to start from scratch, trying
> a release build and no other options, and work my way to trying the
> Kaleidoscope demo again. I will post problems encountered, if any.
>
> Jack
>
> On Wed, Jan 9, 2019 at 1:56 AM Alberto Barbaro <barbaro.alberto at gmail.com>
> wrote:
>
>> Hi Jack,
>> I'm sure few weeks ago I had the same problem with DisableABI and if I
>> remember properly it was because I used different version of llvm-config
>> and clang or because I used the -I with a wrong path. Can you send us the
>> source code you are trying to compile and the command you use for compiling
>> it?
>>
>> Thanks
>>
>>
>> On Wed, Jan 9, 2019, 04:35 Jack Orenstein via llvm-dev <
>> llvm-dev at lists.llvm.org wrote:
>>
>>> Hi, I am brand new to LLVM, or more precisely, trying to be. I'm getting
>>> stuck on compiling LLVM.
>>>
>>> - I tried installing on a Mint 18.1 VM with 6GB RAM, and the builds of
>>> some large executables were killed by the OOM killer. I finally realized
>>> that I needed to build using shared libraries, and succeeded. This was in
>>> November.
>>>
>>> - I put aside my LLVM project, and just got back to it. I got stuck
>>> compiling the Kaleidoscope demo, encountering this error:
>>>
>>>
>>> /tmp/kal-2072b8.o:(.data._ZN4llvm30VerifyDisableABIBreakingChecksE+0x0):
>>> undefined reference to `llvm::DisableABIBreakingChecks'
>>>
>>>   This discussion, from this mailing list, points out that I need to
>>> build LLVM with -DLLVM_DISABLE_ABI_BREAKING_CHECKS_ENFORCING=OFF.
>>>
>>> - So now I am trying to rebuild LLVM, and ran into a few new problems.
>>> First, I discovered that I need the Z3 theorem prover. Unsure why this
>>> problem did not show up before.  Second, I'm running into many errors like
>>> this:
>>>
>>>     CMake Error at cmake/modules/AddLLVM.cmake:570
>>> (target_link_libraries):
>>>       Attempt to add link library "clangAST" to target
>>> "clangApplyReplacements"
>>>       which is not built in this directory.
>>>     Call Stack (most recent call first):
>>>       tools/clang/cmake/modules/AddClang.cmake:86 (llvm_add_library)
>>>       tools/extra/clang-apply-replacements/CMakeLists.txt:5
>>> (add_clang_library)
>>>
>>> Getting LLVM installed is proving much more problematic than I was
>>> expecting, based on experience with many other open source projects. Can
>>> someone give me a push in the right direction? I started with this
>>> document: http://llvm.org/docs/GettingStarted.html, but found no
>>> guidance about the problems with huge executables, advice about shared
>>> libraries, etc.
>>>
>>> Thanks.
>>>
>>> Jack Orenstein
>>> _______________________________________________
>>> LLVM Developers mailing list
>>> llvm-dev at lists.llvm.org
>>> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>>>
>>
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