[swift-users] Pointer not sufficiently aligned for Swift-2.2/ARM

[Jason Pepas]

Hi,

I'm trying to create a swift 2.2 build for armhf (raspberry pi), and I've
run into the following error:

https://gist.github.com/cellularmitosis/5493f105fba36a70bdb8cadbcc9b17df

swift:
/home/cell/sda1/3/swift_src/llvm/include/llvm/ADT/PointerIntPair.h:114:
void llvm::PointerIntPair<swift::ProtocolConformance *, 2,
swift::ConformanceKind,
llvm::PointerLikeTypeTraits<swift::ProtocolConformance *>
>::setPointerAndInt(PointerTy, IntType) [PointerTy =
swift::ProtocolConformance *, IntBits = 2, IntType =
swift::ConformanceKind, PtrTraits =
llvm::PointerLikeTypeTraits<swift::ProtocolConformance *>]: Assertion
`(PtrWord & ~PointerBitMask) == 0 && "Pointer is not sufficiently aligned"'
failed.


I'm guessing that this is generally a problem for any 32-bit architecture
for swift.


Here's a reference to a similar error from a FreeBSD clang bug report from
2013 (also built on raspberry pi):

https://llvm.org/bugs/show_bug.cgi?id=15696

However, it looks like the bug became unreproducible, so they didn't pursue
it.


This build was created using the following scripts:

https://github.com/cellularmitosis/swift-build-scripts/blob/master/arm/build.sh

sources were fetched via:

https://github.com/cellularmitosis/swift-build-scripts/blob/master/arm/fetch.sh

according to this list of SHA's:

https://github.com/cellularmitosis/swift-build-scripts/blob/master/arm/shas.bash


Thanks,
Jason Pepas
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