Fix LLVM ERROR: cannot get default cache directory #17
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With Xcode 15.3 (and/or some conditions), swiftc may cause error. we've observed it during a build using NSTaskCommand.
The PR is a quick workaround for that, assuming LLVM requires env HOME for that case.
References:
LLVM in Xcode may be differ than OSS apple/llvm-project...
https://forums.swift.org/t/xcode-ships-llvm-15-but-swift-builds-llvm-16/67377
report_fatal_error("cannot get default cache directory");<-cache_directoryhttps://github.com/apple/llvm-project/blob/swift/release/5.10/llvm/lib/CAS/ActionCaches.cpp#L140
<-
home_directoryhttps://github.com/apple/llvm-project/blob/swift/release/5.10/llvm/lib/Support/Unix/Path.inc#L1452
<-
getenv("HOME")https://github.com/apple/llvm-project/blob/swift/release/5.10/llvm/lib/Support/Unix/Path.inc#L1375