[llvm-dev] Problems trying to build LLVM (original) (raw)

Jack Orenstein via llvm-dev llvm-dev at lists.llvm.org
Wed Jan 9 20:36:22 PST 2019

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 -DLLVMDISABLEABIBREAKINGCHECKSENFORCING=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 (targetlinklibraries): 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 (llvmaddlibrary) tools/extra/clang-apply-replacements/CMakeLists.txt:5 (addclanglibrary) 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

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