[LLVMdev] Why llvm-gcc/g++ does not support the 64-bit SPARC ABI (-m64)

[Cathy Guo]

My application is 64bit running on Solaris 10 with Sparc. I'd like to
use llvm-gcc/g++ to compile it to make it run faster. But in the Release
Notes of the latest LLVM release, it says

Known problems with the SPARC back-end

* The SPARC backend only supports the 32-bit SPARC ABI (-m32); it does
not support the 64-bit SPARC ABI (-m64).

Why it doesn't support 64bit on sparc?

Thanks!

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