[llvm-dev] Attempt to build MLIR.

[Sourabh Singh Tomar via llvm-dev]

Hello everyone,

Since MLIR landed today. I'm trying to build it using

cmake ../llvm/ -DCMAKE_BUILD_TYPE=RELEASE -DLLVM_TARGETS_TO_BUILD=X86 -DLLVM_ALL_PROJECTS="clang;lld;lldb;mlir" -DBUILD_SHARED_LIBS=ON -DCLANG_DEFAULT_LINKER:STRING=lld

and also by adding -DLLVM_ALL_PROJECTS.

It's giving this compilation error --

Building CXX object tools/mlir/lib/Analysis/CMakeFiles/obj.MLIRAnalysis.dir/AffineAnalysis.cpp.o
In file included from /home/sourabh/mirror-upstream/mlir/include/mlir/Dialect/AffineOps/AffineOps.h:22:0,
                 from /home/sourabh/mirror-upstream/mlir/lib/Analysis/AffineAnalysis.cpp:17:
/home/sourabh/mirror-upstream/mlir/include/mlir/Transforms/LoopLikeInterface.h:22:10: fatal error: mlir/Transforms/LoopLikeInterface.h.inc: No such file or directory
 #include "mlir/Transforms/LoopLikeInterface.h.inc"
          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Am I missing something? -- some pre-requisites ?

Thanks in anticipation!

Sourabh.
compilation terminated.

[Mehdi Amini via llvm-dev]

Hi Sourabh,

This usually indicates a missing dependency in our CMakeLists.txt, if you restart the build a couple of times it will likely succeed.

I will try to fix this missing dependency today.

-- 

Mehdi

[Stephen Neuendorffer via llvm-dev]

These errors seem pretty pervasive for me on a clean build.  It appears that it arises because when tablegen'd headers are included in a .h file, every place where that .h file is used needs a dependency on the corresponding IncGen targets.  This seems broken in the short term and unmaintainable in the long term.  There really needs to be a way of automatically generating the right dependencies.

Steve

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[Sourabh Singh Tomar via llvm-dev]

Not sure, tried couple of times. Seems like while building with "-DBUILD_SHARED_LIBS=ON" causes all these problems.

However, building MLIR with this FLAG disabled -- building fine.

--Sourabh.

[Johan Engelen via llvm-dev]

Hello all,

  FWIW, I am still hitting this [*] build error on release branch 10.x (llvmorg-10.0.0-rc5) when building with:

`cmake -G Ninja -DLLVM_ENABLE_PROJECTS="clang;compiler-rt;lld;polly;mlir" -DCMAKE_INSTALL_PREFIX="/Users/johan/llvm/llvmtrunkinstall" -DLLVM_TARGETS_TO_BUILD="AArch64;ARM;Mips;MSP430;NVPTX;PowerPC;X86" -DLLVM_EXPERIMENTAL_TARGETS_TO_BUILD="RISCV;WebAssembly" -DCMAKE_BUILD_TYPE=Release -DLLVM_ENABLE_ASSERTIONS=ON -DLLVM_APPEND_VC_REV=ON -DLLVM_INSTALL_UTILS=ON ../../llvm` .

Note that I am building with Ninja, perhaps that's the reason?

Cheers,

  Johan

[*] /Users/johan/llvm/llvm/mlir/include/mlir/Transforms/LoopLikeInterface.h:22:10: fatal error: 'mlir/Transforms/LoopLikeInterface.h.inc' file not found

#include "mlir/Transforms/LoopLikeInterface.h.inc"
         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

[Stephen Neuendorffer via llvm-dev]

Hi Johan,

I suspect that you're running into some missing dependencies and that running ninja -k 0; ninja -k 0 will get you a working build.  Alternatively, you might have better luck using HEAD, as I think we've worked out most of these dependency issues there.

Steve