[lldb-dev] Host::GetArchitecture and the default target triple
zturner at google.com
Tue Aug 19 13:52:43 PDT 2014
Looking over the apple code path for Host::GetArchitecture, I'm a little
confused about why all this custom logic is needed. What are the
situations in which llvm::sys::getDefaultTargetTriple() will return
something other than what we want? Specifically, a concrete example might
help illustrate the problem.
I understand from the comment that it has something to do with being able
to run 32 and 64-bit executables in the same operating system. Isn't this
the case everywhere? I can run 32-bit executables on Windows x64 as well.
llvm::Triple has a function called get32BitArchVariant() that I thought
returns a 32-bit triple for this case. Does this not work for some Apple
It seems like this logic should be able to be sunk into llvm::Triple
somehow. Conceptually speaking, it seems like there should be two cases:
host_arch_64 = llvm::Triple::getDefaultTargetTriple()
host_arch_32 = llvm::Triple::getDefaultTargetTriple().get32BitArchVariant()
host_arch_64 = <empty>
host_arch_32 = llvm::Triple::getDefaultTargetTriple()
Why doesn't this work?
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