[all-commits] [llvm/llvm-project] f11056: [clang] serialize SUBMODULE_TOPHEADER relative to ...

[Richard Howell via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: f11056943e56a32d81bb36d11fb5ce8d2b2ce79b
      https://github.com/llvm/llvm-project/commit/f11056943e56a32d81bb36d11fb5ce8d2b2ce79b
  Author: Richard Howell <rhow at fb.com>
  Date:   2022-05-12 (Thu, 12 May 2022)

  Changed paths:
    M clang/lib/Serialization/ASTReader.cpp
    M clang/lib/Serialization/ASTWriter.cpp
    A clang/test/Modules/relative-submodule-topheader.m

  Log Message:
  -----------
  [clang] serialize SUBMODULE_TOPHEADER relative to BaseDirectory

This diff changes the serialization of the `SUBMODULE_TOPHEADER`
entry in module files to be serialized relative to the module's
`BaseDirectory`. This matches the behavior of the
`SUBMODULE_HEADER` entry and will allow for the module to be
relocatable across machines.

The path is restored relative to the module's `BaseDirectory` on
deserialization.

Reviewed By: urnathan

Differential Revision: https://reviews.llvm.org/D124938