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

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 :slight_smile:

-Chris