tahonermann added a comment.

It is unclear to me why/when we would ever want the substitute drive expansion; 
the modified tests aren't very elucidating. My naive expectation is that we 
effectively want to restore the Python 3.7 behavior.



================
Comment at: clang/test/ExtractAPI/relative_include.m:24
+// RUN: %{/t:real}/Frameworks/MyFramework.framework/Headers/MyHeader.h \
+// RUN: %{/t:real}/QuotedHeader.h \
 // RUN: -o %t/output.json 2>&1 -verify | FileCheck -allow-empty %s
----------------
I'm curious why this test requires the `%{/t:real}` normalization. Why would it 
be desirable to expand substitute drives for this test?


================
Comment at: clang/test/Lexer/case-insensitive-include-win.c:8
 // RUN: touch %t.dir/foo.h
-// RUN: not %clang_cl /FI\\?\%t.dir\FOO.h /WX -fsyntax-only %s 2>&1 | 
FileCheck %s
+// RUN: not %clang_cl /FI\\?\%{t:real}.dir\FOO.h /WX -fsyntax-only %s 2>&1 | 
FileCheck %s
 
----------------
I'm curious why this test requires the `%{/t:real}` normalization. Why would it 
be desirable to expand substitute drives for this test?


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D154130/new/

https://reviews.llvm.org/D154130

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