[LLVMdev] Help with building LLVM 2.6 GCC

[naohk]

Sweet peas.

I followed Trevor instruction and successfully built llvm. I left out
--prefix=$PWD/../install option when configure; hence, /usr/local is now
polluted with llvm goodness :)

I kept getting error when building llvm-gcc, because I specify the wrong
path to --enable-llvm option, which should be --enable-llvm=(full path of
the LLVM source/object directory) I should have read FAQ more carefully!

Thanks Trevor.

naohk.


Trevor Harmon-3 wrote:
> 
> On Apr 1, 2010, at 4:45 AM, naohk wrote:
> 
>> Correct me if I'm wrong. To build llvm, you'd need llvm-gcc front-end.
> 
> The Getting Started Guide is a bit misleading on this point because  
> the "Install the llvm-gcc-4.2 front end" step comes before the "Build  
> the LLVM Suite" step, implying that LLVM GCC is a dependency, but it's  
> not.
> 
> FWIW, here's how I build LLVM:
> 
> - mkdir llvm
> - cd llvm
> - Unpack LLVM source (or checkout via Subversion) to "llvm-src"
> - cd llvm-src
> - ./configure --prefix=$PWD/../install
>        --disable-optimized for debug builds; --enable-optimized for  
> release builds
> - make
> - make install
> 
> This works for me on OS X 10.5 and Ubuntu 9.10.
> 
> I've never been able to get the binary distribution of LLVM GCC to  
> work on OS X -- I always get "dyld: Library not loaded: /opt/local/lib/ 
> libiconv.2.dylib" -- so I've gotten in the habit of building LLVM GCC  
> from source (on Linux too). These are the steps that work for me every  
> time:
> 
> - mkdir llvm-gcc
> - cd llvm-gcc
> - Unpack LLVM GCC source (or checkout via Subversion) to "llvm-gcc-src"
> - mkdir obj
> - mkdir install
> - cd obj
> - export TRIPLE=i686-apple-darwin9
>      (Use i386-pc-linux-gnu for Linux)
> - export BUILDOPTIONS=LLVM_VERSION_INFO=2.7
>      (Replace "2.7" with the current version number)
> - export TARGETOPTIONS='--with-arch=nocona --with-tune=generic'
> - ../llvm-gcc-src/configure --prefix=$PWD/../install
>    --program-prefix=llvm- --build=$TRIPLE --host=$TRIPLE
>    --target=$TRIPLE
>    --enable-llvm=(full path of the LLVM source directory)
>    --enable-languages=c,c++ $TARGETOPTIONS
>      (If you built a Debug instead of a Release of LLVM, add
>        --enable-checking.)
>      (On OS X, add "--with-gxx-include-dir=/usr/include/c++/4.0.0")
> - make $BUILDOPTIONS
> - make install
> - If on OS X:
>    ln -sf /usr/lib/libstdc++.6.dylib `pwd`/../install/lib
>    ln -sf /usr/lib/libstdc++.6.dylib `pwd`/../install/lib/libstdc+ 
> +.dylib
> 
> This works for me on OS X 10.5 and Ubuntu 9.10, although I had to  
> install some dependencies on Ubuntu (bison, flex).
> 
> Trevor
> 
> _______________________________________________
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> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
> 
> 

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