llvm dev - Jun 2007 - [LLVMdev] Getting started question.

Hi,

I downloaded and installed the front-end (llvm-gcc 4), and downloaded,
configured, and built llvm-2.0 using -prefix=[myllvmPath] and
-with-llvmgccdir=[llvm-gccPath] 

 

When I try to use sparc as target, llvm-gcc does not recognize it. I
used -march=sparc and it gives two errors:

"bad value (sparc) for -march= switch"

"bad value (sparc) for -mtune= switch"

 

I used -bsparc as argument to llvm-gcc and it gives the following error:

Llvm-gcc : couldn't run
/blah/blah/llvm-gcc4.2.0-x86-linux-RHEL4/bin/sparc-gcc-4.0.1: No such
file or directory

 

What am I missing?

 

I am doing this on Redhat Linux 2.4.21-37 

 

Thanks

Ali

 

-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://lists.llvm.org/pipermail/llvm-dev/attachments/20070611/31e6786c/attachment.html>

On Mon, 11 Jun 2007 Alireza.Moshtaghi at microchip.com
wrote:
> I downloaded and installed the front-end (llvm-gcc 4), and downloaded,
> configured, and built llvm-2.0 using -prefix=[myllvmPath] and
> -with-llvmgccdir=[llvm-gccPath]
ok
> When I try to use sparc as target, llvm-gcc does not recognize it. I
> used -march=sparc and it gives two errors:
Unfortunately, llvm-gcc works like GCC, not like LLVM.  As such, you have 
to hard code in the target to use in the binary.  For llvm-gcc this means 
that you have to configure llvm-gcc itself as a cross compiler from your 
host linux box to your target sparc box.  The standard GCC cross compiler 
options should work.

Alternatively, if you want to get a taste of sparc code, you can do things 
like this:

$ llvm-gcc x.c -O3 -c -o - -emit-llvm | llc -march=sparc

However, this won't necessarily match the sparc ABIs, data layout, etc, so 
it is really only suitable for taste testing the sparc backend :)

-Chris

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