llvm dev - Jan 2014 - [LLVMdev] Specify the default target when configuring LLVM

We have added our own proprietary target to LLVM and up until recently it
was configured only for this target.  I now build it to include additional
targets and this all works fine, I just need to specify the associated
triple when compiling and the correct code-generator is selected.

But I would like to have it default to the triple for our processor when no
triple is specified, and while I can get this to work when I configure/build
using 'cmake' passing:

    cmake ... -DLLVM_TARGETS_TO_BUILD=Ours;X86;Sparc
-DLLVM_DEFAULT_TARGET_TRIPLE=ours ...

I can't seem to get the equivalent to work when I use regular
'configure'
and 'make', and it always defaults to the target corresponding to the
machine building the cross-compiler (in my case this is X86).  Is there a
way of configuring for regular 'make' that will behave the same a the
'cmake' build?

My current LLVM is v3.2 and I am updating to v3.3 at the moment, and will
update to v3.4 soon after.  This seems to be the same for v3.2 and v3.3, I
haven't examined the changes for v3.4 yet.

Thanks,

	Martin O'Riordan - Movidius Ltd.

I'm pretty ignorant about configure but our top-level makefile has
  configure --target=your-default-triple [other stuff...]
We also specify --host and --build which I'm not entirely clear on 
whether they're necessary (don't know if/how these three interact).
--paulr
> -----Original Message-----
> From: llvmdev-bounces at cs.uiuc.edu [mailto:llvmdev-bounces at
cs.uiuc.edu]
> On Behalf Of Martin J. O'Riordan
> Sent: Friday, January 10, 2014 3:57 AM
> To: llvmdev at cs.uiuc.edu
> Subject: [LLVMdev] Specify the default target when configuring LLVM
> 
> We have added our own proprietary target to LLVM and up until recently
> it
> was configured only for this target.  I now build it to include
> additional
> targets and this all works fine, I just need to specify the associated
> triple when compiling and the correct code-generator is selected.
> 
> But I would like to have it default to the triple for our processor when
> no
> triple is specified, and while I can get this to work when I
> configure/build
> using 'cmake' passing:
> 
>     cmake ... -DLLVM_TARGETS_TO_BUILD=Ours;X86;Sparc
> -DLLVM_DEFAULT_TARGET_TRIPLE=ours ...
> 
> I can't seem to get the equivalent to work when I use regular
> 'configure'
> and 'make', and it always defaults to the target corresponding to
the
> machine building the cross-compiler (in my case this is X86).  Is there
> a
> way of configuring for regular 'make' that will behave the same a
the
> 'cmake' build?
> 
> My current LLVM is v3.2 and I am updating to v3.3 at the moment, and
> will
> update to v3.4 soon after.  This seems to be the same for v3.2 and v3.3,
> I
> haven't examined the changes for v3.4 yet.
> 
> Thanks,
> 
> 	Martin O'Riordan - Movidius Ltd.
> 
> 
> _______________________________________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev

Thanks Paul, that's exactly what I needed.  For some reason I never thought
to use '--target' in conjunction with --enable-targets'.

Apologies for the delay in getting back to you, was unwell for a few days.

All the best,

	MartinO

-----Original Message-----
From: Robinson, Paul [mailto:Paul_Robinson at playstation.sony.com] 
Sent: 10 January 2014 19:07
To: Martin.ORiordan at movidius.com; llvmdev at cs.uiuc.edu
Subject: RE: [LLVMdev] Specify the default target when configuring LLVM

I'm pretty ignorant about configure but our top-level makefile has
  configure --target=your-default-triple [other stuff...] We also specify
--host and --build which I'm not entirely clear on whether they're
necessary
(don't know if/how these three interact).
--paulr
> -----Original Message-----
> From: llvmdev-bounces at cs.uiuc.edu [mailto:llvmdev-bounces at
cs.uiuc.edu]
> On Behalf Of Martin J. O'Riordan
> Sent: Friday, January 10, 2014 3:57 AM
> To: llvmdev at cs.uiuc.edu
> Subject: [LLVMdev] Specify the default target when configuring LLVM
> 
> We have added our own proprietary target to LLVM and up until recently 
> it was configured only for this target.  I now build it to include 
> additional targets and this all works fine, I just need to specify the 
> associated triple when compiling and the correct code-generator is 
> selected.
> 
> But I would like to have it default to the triple for our processor 
> when no triple is specified, and while I can get this to work when I 
> configure/build using 'cmake' passing:
> 
>     cmake ... -DLLVM_TARGETS_TO_BUILD=Ours;X86;Sparc
> -DLLVM_DEFAULT_TARGET_TRIPLE=ours ...
> 
> I can't seem to get the equivalent to work when I use regular 
> 'configure'
> and 'make', and it always defaults to the target corresponding to
the
> machine building the cross-compiler (in my case this is X86).  Is 
> there a way of configuring for regular 'make' that will behave the 
> same a the 'cmake' build?
> 
> My current LLVM is v3.2 and I am updating to v3.3 at the moment, and 
> will update to v3.4 soon after.  This seems to be the same for v3.2 
> and v3.3, I haven't examined the changes for v3.4 yet.
> 
> Thanks,
> 
> 	Martin O'Riordan - Movidius Ltd.
> 
> 
> _______________________________________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev