[llvm-bugs] [Bug 43204] New: clang 9 "no such file" error on Windows mapped drive

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=43204

            Bug ID: 43204
           Summary: clang 9 "no such file" error on Windows mapped drive
           Product: clang
           Version: 9.0
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: -New Bugs
          Assignee: unassignedclangbugs at nondot.org
          Reporter: hans at chromium.org
                CC: htmldeveloper at gmail.com,
                    jeroen.dobbelaere at synopsys.com,
                    llvm-bugs at lists.llvm.org, neeilans at live.com,
                    richard-llvm at metafoo.co.uk
            Blocks: 43166

As reported by Jeroen here:
http://lists.llvm.org/pipermail/cfe-dev/2019-September/063225.html


clang 9 does not seem to be able to open files using relative paths on mapped
drives.


For example:

mkdir \src\tmp\foo
net use x: \\localhost\c$\src\tmp\foo
gvim x:\a.c
x:
c:\src\llvm.monorepo\build.release\bin\clang-cl /c a.c
clang-cl: error: no such file or directory: 'a.c'


clang 8 did not have this problem.


Referenced Bugs:

https://bugs.llvm.org/show_bug.cgi?id=43166
[Bug 43166] LoopVectorizer miscompiles (when doing fold by tail masking?)
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