llvm dev - Dec 2020 - Unable to get started with LLI and LLC

On Wed, 2 Dec 2020 at 02:09, Jagrat Patkar <jagratpatkar at gmail.com>
wrote:
> I tried this out inside llvm-project/build
> cmake -G Ninja  tools/lli
> cmake -G Ninja  tools/llc
>
> but none of it worked, although the subdirectories do exist under the 
llvm-project/build/tools/llc or lli
Yep, those two are never going to work. The CMakeLists.txt in those
directories aren't self-contained.
> cmake -G Ninja -DLLVM_ENABLE_PROJECTS="clang;lli;llc" ../llvm 
this command which resulted in the build directory getting loaded with many
subdirectories including tools directory containing lli and llc. But still it
didn't enable lli and llc even after mentioning it in the ENABLE_PROJECTS
flag
You don't need lli or llc in LLVM_ENABLE_PROJECTS because they're part
of baseline LLVM. But other than that it should have worked. What
error message did you get when you tried running "ninja llc" after
that CMake command?

Cheers.

Tim.

If I execute the following command from the *build directory*
(llvm-project/build)


*cmake -G Ninja ../llvm/tools/llc *

then I am getting the following error

*CMake Error: The source
"/Users/jagratpatkar/Desktop/ComputerScience/llvm-project/llvm/tools/llc/CMakeLists.txt"
does not match the source
"/Users/jagratpatkar/Desktop/ComputerScience/llvm-project/llvm/CMakeLists.txt"
used to generate cache.  Re-run cmake with a different source directory.*

Thanks!
Jagrat Patkar.


On Wed, Dec 2, 2020 at 5:55 PM Tim Northover <t.p.northover at gmail.com>
wrote:
> On Wed, 2 Dec 2020 at 02:09, Jagrat Patkar <jagratpatkar at
gmail.com> wrote:
> > I tried this out inside llvm-project/build
> > cmake -G Ninja  tools/lli
> > cmake -G Ninja  tools/llc
> >
> > but none of it worked, although the subdirectories do exist under the
> llvm-project/build/tools/llc or lli
>
> Yep, those two are never going to work. The CMakeLists.txt in those
> directories aren't self-contained.
>
> > cmake -G Ninja -DLLVM_ENABLE_PROJECTS="clang;lli;llc"
../llvm  this
> command which resulted in the build directory getting loaded with many
> subdirectories including tools directory containing lli and llc. But still
> it didn't enable lli and llc even after mentioning it in the
> ENABLE_PROJECTS flag
>
> You don't need lli or llc in LLVM_ENABLE_PROJECTS because they're
part
> of baseline LLVM. But other than that it should have worked. What
> error message did you get when you tried running "ninja llc"
after
> that CMake command?
>
> Cheers.
>
> Tim.
>
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