LLVM for crosscompiling?

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1

If you want to use llvm-gcc as a cross compiler, you must configure it as
a cross compiler, and compile the output with the appropriate cross
toolchain. LLVM does not implicitly make your code portable, see:
http://llvm.org/docs/tutorial/LangImpl8.html#targetindep

for example.

-Chris

Hm.. so the C backend works differently if I configure LLVM to be a cross
compiler? I am using a cross-compile toolchain as a backend (feeding it the "llc
-march c" output), so I'm a bit confused. I'm not looking for a target
independent IR, either...

Regarding building LLVM as a cross compiler, I assume it should be pretty much
identical to building gcc as a cross compiler? (sans adding the LLVM_OBJ
directory when configuring).

2

Hm.. so the C backend works differently if I configure LLVM to be a cross
compiler?

Yes, it generates output matching the target triple stored in the .bc file.

Regarding building LLVM as a cross compiler, I assume it should be pretty much
identical to building gcc as a cross compiler? (sans adding the LLVM_OBJ
directory when configuring).

Yep

-Chris