[llvm-dev] Why can't clang -emit-llvm when linking?

[Lorenzo Laneve via llvm-dev]

When I try to do 

clang++ main.cpp -emit-llvm

without -S, clang says that he can’t:

clang: error: -emit-llvm cannot be used when linking


why can’t it emit the IR in a complete compilation process?

Is there a particular technical reason or just to avoid confusing jobs?
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