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Don't change the default VFS in Driver, update tests & reland.
This reverts commit 999f8a7416f8edc54ef92e715fd23c532bcc74d4.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@374926 91177308-0d34-0410-b5e6-96231b3b80d8
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This made clang unable to open files using relative paths on network shares on
Windows (PR43204). On the bug it was pointed out that createPhysicalFileSystem()
is not terribly mature, and using it is risky. Reverting for now until there's
a clear way forward.
> Currently the `-working-directory` option does not actually impact the working
> directory for all of the clang driver, it only impacts how files are looked up
> to make sure they exist. This means that that clang passes the wrong paths
> to -fdebug-compilation-dir and -coverage-notes-file.
>
> This patch fixes that by changing all the places in the driver where we convert
> to absolute paths to use the VFS, and then calling setCurrentWorkingDirectory on
> the VFS. This also changes the default VFS for `Driver` to use a virtualized
> working directory, instead of changing the process's working directory.
>
> Differential Revision: https://reviews.llvm.org/D62271
This also revertes the part of r369938 which checked that -working-directory works.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@371027 91177308-0d34-0410-b5e6-96231b3b80d8
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Windows bots didn't seem to like the empty argument, so I rewrote the test.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@369956 91177308-0d34-0410-b5e6-96231b3b80d8
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a fragment of a compilation database for each compilation
This patch adds a new option called -gen-cdb-fragment-path to the driver,
which can be used to specify a directory path to which clang can emit a fragment
of a CDB for each compilation it needs to invoke.
This option emits the same CDB contents as -MJ, and will be ignored if -MJ is specified.
Differential Revision: https://reviews.llvm.org/D66555
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@369938 91177308-0d34-0410-b5e6-96231b3b80d8
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