app store - iOS fat binaries: should every arch include bitcode? -

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when building library used in bitcode-enabled apps, each arch in fat binary need built -fembed-bitcode or 1 of them?

one of them because bitcode architecture-independent , duplicated?

all of them because pre-processor commands may alter code based on architecture (e.g. nsinteger width)?

excluding x86 slices otherwise duplicate symbol _llvm.cmdline happens? - rdar://21884601

bitcode form of llvm ir, architecture-dependent.

which means each slice in fat binary should contain it's own bitcode section.

upd. wrote blog-post bitcode, may find there useful details: bitcode demystified


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