llvm dev - Dec 2006 - [LLVMdev] Building llvm-gcc4 on amd64

Hi all,

I spent several hours today trying to compile llvm-gcc4 from svn and llvm from
cvs on amd64 linux. In the case anyone else decides to try the same, this
could ease your pain:

1) check out llvm, llvm-gcc
2) create llvm-obj llvm-gcc-obj
export LLVM_INSTAL=<install_dir>
cd llvm-obj
export LLVM_OBJ=`pwd`
../llvm/configure --prefix=$LLVM_INSTALL --enable-debug-runtime
4) At one point, the build script calls c++, but by default, gcc
installs g++, and (at least 4.0.3 on my machine) doesn't create
c++ alias, so create one if you don't already have it:
ln -s /usr/bin/g++ /usr/bin/c++
5) cd ../llvm-gcc-obj
6)
../llvm-gcc/configure --disable-shared --prefix=$LLVM_INSTALL \
    --enable-languages=c,c++ --enable-llvm=$LLVM_OBJ \
    --program-prefix=llvm- --enable-checking --disable-multilib


llvm-gcc4 README.LLVM doesn't mention that --disable-multilib is
required for amd64. I guess that should be updated.

Domagoj

On Sat, 9 Dec 2006, Domagoj Babic wrote:
> llvm-gcc4 README.LLVM doesn't mention that --disable-multilib is
> required for amd64. I guess that should be updated.
I added a note.  What fails though?  This shouldn't be needed.

-Chris

-- 
http://nondot.org/sabre/
http://llvm.org/

I am also trying to build llvm-gcc4 and llvm as you are on amd64 linux. I am
currently running into the error "Did not get a target machine!" on
the
first file compiled by xgcc. Did you encounter this error at all?

Also, what distribution did you use? GCC version, and target triple?

Thanks,
-Chandler Carruth

On 12/10/06, Domagoj Babic <babic.domagoj at gmail.com>
wrote:
>
> Hi all,
>
> I spent several hours today trying to compile llvm-gcc4 from svn and llvm
> from
> cvs on amd64 linux. In the case anyone else decides to try the same, this
> could ease your pain:
>
> 1) check out llvm, llvm-gcc
> 2) create llvm-obj llvm-gcc-obj
> export LLVM_INSTAL=<install_dir>
> cd llvm-obj
> export LLVM_OBJ=`pwd`
> ../llvm/configure --prefix=$LLVM_INSTALL --enable-debug-runtime
> 4) At one point, the build script calls c++, but by default, gcc
> installs g++, and (at least 4.0.3 on my machine) doesn't create
> c++ alias, so create one if you don't already have it:
> ln -s /usr/bin/g++ /usr/bin/c++
> 5) cd ../llvm-gcc-obj
> 6)
> ../llvm-gcc/configure --disable-shared --prefix=$LLVM_INSTALL \
>     --enable-languages=c,c++ --enable-llvm=$LLVM_OBJ \
>     --program-prefix=llvm- --enable-checking --disable-multilib
>
>
> llvm-gcc4 README.LLVM doesn't mention that --disable-multilib is
> required for amd64. I guess that should be updated.
>
> Domagoj
> _______________________________________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
>
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Hi Chandler,

I didn't have to specify target triple at all, just -disable-multilib.
Also, you need to compile things in the proper order. I don't remeber
the order exactly, I think llvm -> llvm_gcc4 -> make check llvm.

Domagoj