[llvm-bugs] [Bug 34269] New: Clang 5.0.0 RC2 doesn't recognize DevDiv internal builds of MSVC
llvm-bugs at lists.llvm.org
Mon Aug 21 15:40:15 PDT 2017
Bug ID: 34269
Summary: Clang 5.0.0 RC2 doesn't recognize DevDiv internal
builds of MSVC
OS: Windows NT
Severity: release blocker
Assignee: unassignedclangbugs at nondot.org
Reporter: sfinae at hotmail.com
CC: llvm-bugs at lists.llvm.org
Mail thread: https://lists.llvm.org/pipermail/cfe-dev/2017-August/055022.html
Fixed in master by r311391: https://reviews.llvm.org/D36860
To summarize, there's a regression between Clang 4.0.1 and 5.0.0 RC2, where
Clang no longer recognizes the DevDiv-internal directory structure of MSVC
builds. This makes it more difficult for us to test MSVC's STL with Clang (such
testing helps us avoid writing code that unintentionally depends on
non-Standard behavior of C1XX, and also helps us find bugs in Clang).
While I figured out a workaround for this regression (explicitly pass
-fms-compatibility-version and invoke link.exe separately), it would be great
if the fix r311391 could be merged into 5.0.0.
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