[PATCH] D75012: [ReleaseNotes] Mention -fmacro-prefix-map and -ffile-prefix-map.

[Peter Wu via Phabricator via cfe-commits]

Lekensteyn created this revision.
Lekensteyn added reviewers: dankm, MaskRay, hans.
Herald added a project: clang.

Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D75012

Files:
  clang/docs/ReleaseNotes.rst


Index: clang/docs/ReleaseNotes.rst
===================================================================
--- clang/docs/ReleaseNotes.rst
+++ clang/docs/ReleaseNotes.rst
@@ -138,6 +138,12 @@
   please let us know if you encounter a situation where you need to specify this
   flag for correct program behavior.
 
+- ``-fmacro-prefix-map=OLD=NEW`` allows a directory prefix ``OLD`` in
+  ``__FILE__`` preprocessor macros to be substituted for ``NEW``. This helps
+  with reproducible builds that are location independent. The new
+  ``-ffile-prefix-map`` option is equivalent to specifying both
+  ``-fdebug-prefix-map`` and ``-fmacro-prefix-map``.
+
 Deprecated Compiler Flags
 -------------------------
 


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