llvm dev - Dec 2010 - [LLVMdev] Question of autotools about adding a new target for LLVM

Hello all,

I am a beginner of LLVM and want to add a new Target for LLVM. I follow the
document (http://llvm.org/docs/WritingAnLLVMBackend.html)

to modify autotools/configure.ac. However when I type ./AutoRegen.sh

There is an error that "Your autoconf was not detected as being 2.60"

I download the source of autoconf 2.60 and install it. And there is the
other error that

"Your aclocal was not detected as being 1.9.6". Now I don't know
where to
download the source code of

aclocal 1.9.6. Would any developer mind to tell me how to deal with this
problem??

I have another question that there is a sentence

"You must be using Autoconf version 2.59 or later and your aclocal version
should be 1.9 or later." in http://llvm.org/docs/Projects.html

I have autoconf 2.68 and aclocal 1.11.1 in my computer. Why couldn't I
auto-regen the configure file successfully??

thanks a lot

yi-hong
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On Dec 25, 2010, at 12:17 PM, Lu Mitnick wrote:
> Hello all,
> 
> I am a beginner of LLVM and want to add a new Target for LLVM. I follow the
document (http://llvm.org/docs/WritingAnLLVMBackend.html)
> 
> to modify autotools/configure.ac. However when I type ./AutoRegen.sh
> 
> There is an error that "Your autoconf was not detected as being
2.60"
Yes, we require exactly 2.60.
> 
> I download the source of autoconf 2.60 and install it. And there is the
other error that
> 
> "Your aclocal was not detected as being 1.9.6". Now I don't
know where to download the source code of
> 
> aclocal 1.9.6. Would any developer mind to tell me how to deal with this
problem??
> 
aclocal is part of the automake package. So you need to install automake 1.9.6.

> I have another question that there is a sentence 
> 
> "You must be using Autoconf version 2.59 or later and your aclocal
version should be 1.9 or later." in http://llvm.org/docs/Projects.html
> 
> I have autoconf 2.68 and aclocal 1.11.1 in my computer. Why couldn't I
auto-regen the configure file successfully??
We require exact versions to avoid excess churn and for testability. If
there's a reason to move to a later version and people are willing to test
I'll look to using newer versions to regenerate the file.

-eric

Lu Mitnick <king19880326 at gmail.com> writes:
> I am a beginner of LLVM and want to add a new Target for LLVM. I follow the
> document (http://llvm.org/docs/WritingAnLLVMBackend.html)
>
> to modify autotools/configure.ac. However when I type ./AutoRegen.sh
Never tried it, but for adding a new target to the cmake build you need
to add the target name to this list on $LLVM_ROOT_DIR/CMakeLists.txt:

set(LLVM_ALL_TARGETS
  Alpha
  ARM
  Blackfin
  CBackend
  CellSPU
  ...

Then create the CMakeLists.txt files on your target's directory
with the list of your source files, tablegen calls, etc (you can use any
other target as a model)

Finally, follow http://www.llvm.org/docs/CMake.html for building.

HTH.

[snip]

Good morning, Lu.

You may do;

1) build and install certain autotools with --prefix=/path/to/your/autotools
2) run the line; PATH=/path/to/your/autotools/bin:$PATH autoconf/AutoRegen.sh


Good luck! ...Takumi

Hello Takumi and all,

I follow the steps  and run ./autoconf/AutoRegen.sh successfully(haven't
modified configure.ac yet)

However there is a little difference between origin configure file and the
generated one.

$diff configure configure.bak

1394c1394
<   --enable-optimized      Compile with optimizations enabled (default is
YES)
---
>   --enable-optimized      Compile with optimizations enabled (default is
NO)

I am wondering to know whether I miss some parameter with executing
AutoRegen.sh??

thanks a lot

yi-hong

2010/12/27 NAKAMURA Takumi <geek4civic at gmail.com>
> Good morning, Lu.
>
> You may do;
>
> 1) build and install certain autotools with
> --prefix=/path/to/your/autotools
> 2) run the line; PATH=/path/to/your/autotools/bin:$PATH
> autoconf/AutoRegen.sh
>
>
> Good luck! ...Takumi
>
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