[libclc] [libclc] Fix a couple of issues preventing in-tree builds (PR #87505)

[Fraser Cormack via cfe-commits]

frasercrmck wrote:

> > > ```
> > >       set( spv_suffix ${arch_suffix}.spv )
> > >       add_custom_command( OUTPUT "${spv_suffix}"
> > >         COMMAND ${LLVM_SPIRV} ${spvflags} -o "${spv_suffix}" ${builtins_opt_lib_tgt}
> > >         DEPENDS ${builtins_link_lib_tgt} )
> > > ```
> > > 
> > > 
> > >     
> > >       
> > >     
> > > 
> > >       
> > >     
> > > 
> > >     
> > >   
> > > I think that ought to be `DEPENDS ${builtins_opt_lib_tgt}`. Do you need me to send a PR for that?
> > 
> > 
> > Hmm yes you might be right. Just to confirm, does that fix the problem for you?
> > I can't be sure but it seems like that was a problem before [61efea7](https://github.com/llvm/llvm-project/commit/61efea7142e904e6492e1ce0566ec23d9d221c1e) when I last touched it, as least from a simple reading of the CMake.
> 
> I think the issue is not coming from the DEPENDS but from the source.
> 
> ```
> - COMMAND ${LLVM_SPIRV} ${spvflags} -o "${spv_suffix}" ${builtins_opt_lib_tgt}
> + COMMAND ${LLVM_SPIRV} ${spvflags} -o "${spv_suffix}" ${builtins_link_lib_tgt}
> ```

Yes, that's it.

https://github.com/llvm/llvm-project/pull/87505