12/7/2023 0 Comments Xcode 12 cocoapodsFor vendors, it also means you can distribute a single XCFramework containing all your target platforms. This division into individual frameworks means you no longer have to spend time merging and then stripping platform binaries when linking. Each of these folders is its own framework, complete with headers, modules, and binary. Your top-level XCFramework folder would then have folders like ios-arm64, ios-arm64-simulator, etc. Instead, you build one small framework for each combination of architecture and target and store it in its own folder. In XCFramework, you no longer build a single framework with multiple architectures. XCFramework is Apple’s answer to the puzzle described above. The binary framework contains different code for the same architecture in multiple places, and Xcode doesn’t know how to handle it. The previous way to link binary frameworks, lipo, is unable to deal with a merged binary containing multiple binaries that share the same architecture. The iOS Simulator has different rules than the iPhone, and you cannot run a binary built for one on the other. They have the same architecture name, but the code for each target is very different. Now, however, the corresponding binary file would have slices like the following: In other words, since the architectures for iPhones did not overlap with the architecture for Macs, the linker would never get tripped up over which binary to use for a given target. Since the three languages are all separate, it was easy to have different rules for simulator versus device. The linker would pick one of the architectures to use at build time depending on the hardware destination. Historically, that would mean a single binary file had slices like the following: These frameworks were shipped as “fat” frameworks, meaning a vendor would build a single framework that contained all the required architectures. The problem stems from the previous way of linking binary frameworks. This all sounds great, so what is the problem with having Macs and iPhones share the same CPU architecture?
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