[LLVMdev] Passing llc options to Clang

Reid Kleckner rnk at google.com
Mon Oct 13 13:55:27 PDT 2014

You'll be a lot better off if you use the gcc-style flags that clang
accepts. If you bypass clang, it will generate LLVM IR for the default
target, and then attempt to compile that IR using the triple you provided
to llc.

Try 'clang --target=x86_64-linux-gnu' or whatever your target is.

On Mon, Oct 13, 2014 at 12:48 PM, Ziqiang Patrick Huang <
ziqiang.huang1001 at gmail.com> wrote:

> Hi,
> Is there a way to passing llc options to clang, for example -march -mcpu,
> etc. ?
> Some threads suggested using -mllvm flag,
> I tried ./clang -mllvm -march=X86-64 -mcpu=core2 -o hello hello.c, but got
> "Unknown command line argument"
> Thanks,
> Ziqiang
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