[LLVMdev] Out of tree targets

[Neil Henning]

So would anyone object to me trying to find a resolution for this? The 
easiest way would be that explicit subdirectories in the LLVMBuild.txt 
are always picked up, but we could have a way to scan the folders in 
lib/Target, and any folder can be added if it was declared in the 
experimental build option (or something to that effect).

-Neil.

On 09/03/15 17:22, Eric Christopher wrote:
> Mmm.. true. Explicit dependencies are both nice and annoying. We'd 
> need to mention it somewhere basically.
>
> -eric
>
> On Mon, Mar 9, 2015 at 10:19 AM Anton Korobeynikov 
> <anton at korobeynikov.info <mailto:anton at korobeynikov.info>> wrote:
>
>     I believe we'd need LLVMBuild.txt even in autoconf build - for bunch
>     of autogenerated stuff, e.g. list of all asmprinters / asmparsers /
>     InitializeAllTargetInfos, etc., since targets are not autoregistered
>     anymore.
>
>     On Mon, Mar 9, 2015 at 7:20 PM, Eric Christopher
>     <echristo at gmail.com <mailto:echristo at gmail.com>> wrote:
>     > Hi Neil,
>     >
>     > Weird, I'd think the cmake build should probably do something
>     similar to the
>     > autoconf build if possible and just have subdirectories equal to
>     the targets
>     > to build. I'm not sure if this is possible etc... could try some
>     setting
>     > etc.
>     >
>     > -eric
>     >
>     > On Mon, Mar 9, 2015 at 9:11 AM Neil Henning <llvm at duskborn.com
>     <mailto:llvm at duskborn.com>> wrote:
>     >>
>     >> Hey all,
>     >>
>     >> Quick query on out of tree target support - at present I can
>     drop a folder
>     >> Foo into <llvm>/lib/Target/Foo and use the CMake option
>     >> LLVM_EXPERIMENTAL_TARGETS_TO_BUILD to pick up my target. The
>     issue is that I
>     >> still need to patch the one LLVMBuild.txt file in
>     <llvm>/lib/Target with;
>     >>
>     >> iff --git a/lib/Target/LLVMBuild.txt b/lib/Target/LLVMBuild.txt
>     >> index 4112046..6e42cbe 100644
>     >> --- a/lib/Target/LLVMBuild.txt
>     >> +++ b/lib/Target/LLVMBuild.txt
>     >> @@ -16,7 +16,7 @@
>     >>
>     >>
>     ;===------------------------------------------------------------------------===;
>     >>
>     >>  [common]
>     >> -subdirectories = ARM AArch64 BPF CppBackend Hexagon MSP430
>     NVPTX Mips
>     >> PowerPC R600 Sparc SystemZ X86 XCore
>     >> +subdirectories = ARM AArch64 BPF CppBackend Hexagon MSP430
>     NVPTX Mips
>     >> PowerPC R600 Sparc SystemZ X86 XCore Foo
>     >>
>     >>  ; This is a special group whose required libraries are
>     extended (by
>     >> llvm-build)
>     >>  ; with the best execution engine (the native JIT, if
>     available, or the
>     >>
>     >> To include my target in the LLVM build, and this allows me to
>     specify
>     >> -march=foo and it will call into my code correctly.
>     >>
>     >> Am I missing something - or is this patch definitely required?
>     >>
>     >> If the patch is required - does anyone have any
>     suggestions/ideas how I
>     >> could add support to either LLVMBuild or the specific
>     LLVMBuild.txt file so
>     >> that it would pick up my new Target?
>     >>
>     >> I understand that my patch is tiny and relatively easy to
>     maintain (it
>     >> will basically always merge well) - but it still irks me having
>     to keep a
>     >> patch where it probably isn't required!
>     >>
>     >> Cheers,
>     >> -Neil.
>     >> _______________________________________________
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>     http://llvm.cs.uiuc.edu
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>     >
>     >
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>     >
>
>
>
>     --
>     With best regards, Anton Korobeynikov
>     Faculty of Mathematics and Mechanics, Saint Petersburg State
>     University
>

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