Steven Wu 2bc4080116 [ExplicitModule] Include -Xcc -D into module hash ...

The decision to exclude `-Xcc -D` options from swift module hash
actually doesn't help to solve the problem. It wouldn't reduce the
module variants (or the number of swiftmodule build commands) because
the command-line also encodes all the clang PCM dependencies that do get
affected by `-Xcc` flags.

To avoid the false sharing and the nondeterministic build products,
include most of the `-Xcc` flags, except include search path, into swift
module hash.

rdar://132046247

2024-07-23 14:57:44 -07:00

27 KiB

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