[Adding Vedant directly] I'm not super familiar with the swift build scripts, but I have a theory of what is going wrong. I think the problem is that compiler-rt is being built during the cross build, and it really shouldn't be.
The compiler-rt build system has some significant flaws, and it is being reworked to resolve them. The problem causing this is that we have a hacked up CMake build process that generates multiple cross-targeted binaries from a single build configuration. I believe that compiler-rt's built-in hacky cross-targeting is tripping over however swift is supporting cross-targeting, and it is falling over. With the current state of compiler-rt the right way to build it for Darwin is to treat it as host content, and it will build the Darwin-cross libraries too. Then you can pull the cross-libraries out and put them into the device build. Vedant, if you have questions feel free to swing by my office on Monday. -Chris > On Mar 19, 2016, at 10:11 AM, Andrew Hyatt via swift-dev > <[email protected]> wrote: > > (From /u/thegreatbeanz on reddit.com/r/swift) > > So the problem here is actually that something has gone horribly wrong when > configuring compiler- rt. > You'll notice in the clang commands that it is building in this directory: > clang_rt.builtins_armv7_10.4.dir > What that means is it is building the clang_rt.10.4 archive which provides > back ported library functions to OS X 10.4. Obviously 10.4 didn't support > armv7 as an architecture, something has gone really wrong here. > If you're on the latest swift it is probably a regression caused by 53f48f8. > You need to email swift-dev to get support from Dmitri Gribenko and Vedant > Kumar. > Source: I wrote most of the compiler-rt builtin build system for Darwin. > > Andrew Hyatt > [email protected] > >> On Mar 19, 2016, at 9:26 AM, Andrew Hyatt via swift-dev >> <[email protected]> wrote: >> >> Building swift-llvm fails when using build-script to cross compile because >> build-script wrongly gives duplicate -isysroot arguments. >> >> The full arguments that are given to clang by build-script while building >> LLVM are here: https://gist.github.com/ahyattdev/8ecc5d3808b9ee543a60 >> >> The command I use to build the compiler, using the latest sources from GitHub >> >> utils/build-script -R -i -- --cross-compile-tools-deployment-targets >> "iphoneos-arm64 iphoneos-armv7 iphoneos-armv7s" >> --user-config-args="-DLLVM_ENABLE_BACKTRACES=Off" >> >> This error occurs after the phase of building llvm for the host machine, and >> occurs during the cross compilation phase. >> >> Andrew Hyatt >> [email protected] >> >> _______________________________________________ >> swift-dev mailing list >> [email protected] >> https://lists.swift.org/mailman/listinfo/swift-dev > > _______________________________________________ > swift-dev mailing list > [email protected] > https://lists.swift.org/mailman/listinfo/swift-dev
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