[LLVMdev] Question about uninstalling LLVM
isanbard at gmail.com
Sat Oct 28 15:47:41 CDT 2006
On Oct 27, 2006, at 9:31 PM, Seung Jae Lee wrote:
> Hello. Nice to meet you.
> My name is Seung Jae Lee, a graduate student in UIUC CEE, who is
> working in NCSA for the present.
> Nowadays I am trying to develop LLVM backend to spit out CHiMPS
> assembly code. In the process, I installed LLVM codes on my home
> directory in the host computer. But I don't think it was installed
> properly. While bootstrapping the LLVM C/C++ Front-End, I met
> several errors, so I think it's better for me to remove what has
> been done and to re-install LLVM.
> In fact, there are LLVM-GCC in the host computer in other account
> but there are no LLVM suite. For this reason, I tried to have my
> own LLVM. Eventually I failed. I think there might be conflict
> between mine and the main directory.
> For this reason, I think it would be greatly helpful even if I have
> quite a bit of your advice.
> Would you mind replying to me?
> Thank you very much.
> Seung Jae Lee
In addition to what John wrote, I wanted to ask: Do you need to
compile the LLVM-GCC front-end yourself? If not, then you could just
use the binary distribution provided by the http://llvm.org/ website.
(This is assuming that you're running on Linux, Mac, FreeBSD, or
Mingw. The website is here:
You'll get a tar ball which you can unpack anywhere. You can then
just set your PATH environment variable to point to that before
pointing to the system's LLVM-GCC front-end.
If you really *really* need to compile the LLVM-GCC front-end on your
own, you should follow the directions here:
There's also a README.LLVM in the LLVM-GCC source tree which you'll
need to read as well.
The order of compilations goes like this:
- Download the LLVM-GCC binary distribution.
- Unpack the binary.
- Add the binary to your PATH environment variable.
- If you're using the LLVM-GCC4 front-end (recommended), then CD
into its bin/ directory and create sym-links to the c++, cpp, g++,
and gcc executables called llvm-c++, llvm-cpp, llvm-g++, and llvm-gcc
- Download LLVM's source tree
- Build the LLVM source tree.
- Attain enlightenment. :-)
If you need to build the front-end, you'll have to build it AFTER you
build the LLVM source. Again, don't do this unless you absolutely
I hope this helps!
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