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# b9d50bdf 01-May-2020 Nico Weber <thakis@chromium.org>

Fix pr31836 on Windows too, and correctly handle repeated separators.

The approach in D30000 assumes that the '/' returned by path::begin()
is the first element for absolute paths, but that's not tr

Fix pr31836 on Windows too, and correctly handle repeated separators.

The approach in D30000 assumes that the '/' returned by path::begin()
is the first element for absolute paths, but that's not true on
Windows.

Also, on Windows backslashes in include lines often end up escaped
so that there are two of them. Having backslashes in include lines
is undefined behavior in most cases and implementation-defined
behavior in C++20, but since clang treats it as normal repeated
path separators, the diagnostic should too.

Unbreaks -Wnonportable-include-path for absolute paths on Windows,
and unbreaks it on non-Windows in the case of absolute paths with
repeated directory separators.

This affects e.g. the `#include __FILE__` technique if the file
passed to clang has the wrong case for the drive letter. Before:

C:\src\llvm-project>bin\clang-cl.exe c:\src\llvm-project\test.cc
c:\\src\\llvm-project\\test.cc(4,10): warning: non-portable path to file
'"c\\srccllvm-projectctest.cc.'; specified path differs in case from
file name on disk [-Wnonportable-include-path]
^

Now:

C:\src\llvm-project> out\gn\bin\clang-cl c:\src\llvm-project\test.cc
c:\\src\\llvm-project\\test.cc(4,10): warning: non-portable path to file
'"C:\\src\\llvm-project\\test.cc"'; specified path differs in case from
file name on disk [-Wnonportable-include-path]
^

Differential Revision: https://reviews.llvm.org/D79223

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Revision tags: llvmorg-10.0.0, llvmorg-10.0.0-rc6, llvmorg-10.0.0-rc5, llvmorg-10.0.0-rc4, llvmorg-10.0.0-rc3, llvmorg-10.0.0-rc2, llvmorg-10.0.0-rc1, llvmorg-11-init, llvmorg-9.0.1, llvmorg-9.0.1-rc3, llvmorg-9.0.1-rc2, llvmorg-9.0.1-rc1, llvmorg-9.0.0, llvmorg-9.0.0-rc6, llvmorg-9.0.0-rc5, llvmorg-9.0.0-rc4, llvmorg-9.0.0-rc3, llvmorg-9.0.0-rc2, llvmorg-9.0.0-rc1, llvmorg-10-init, llvmorg-8.0.1, llvmorg-8.0.1-rc4, llvmorg-8.0.1-rc3, llvmorg-8.0.1-rc2, llvmorg-8.0.1-rc1, llvmorg-8.0.0, llvmorg-8.0.0-rc5, llvmorg-8.0.0-rc4, llvmorg-8.0.0-rc3, llvmorg-7.1.0, llvmorg-7.1.0-rc1, llvmorg-8.0.0-rc2, llvmorg-8.0.0-rc1, llvmorg-7.0.1, llvmorg-7.0.1-rc3, llvmorg-7.0.1-rc2, llvmorg-7.0.1-rc1, llvmorg-7.0.0, llvmorg-7.0.0-rc3, llvmorg-7.0.0-rc2, llvmorg-7.0.0-rc1, llvmorg-6.0.1, llvmorg-6.0.1-rc3, llvmorg-6.0.1-rc2, llvmorg-6.0.1-rc1, llvmorg-5.0.2, llvmorg-5.0.2-rc2, llvmorg-5.0.2-rc1, llvmorg-6.0.0, llvmorg-6.0.0-rc3, llvmorg-6.0.0-rc2, llvmorg-6.0.0-rc1, llvmorg-5.0.1, llvmorg-5.0.1-rc3, llvmorg-5.0.1-rc2, llvmorg-5.0.1-rc1, llvmorg-5.0.0, llvmorg-5.0.0-rc5, llvmorg-5.0.0-rc4, llvmorg-5.0.0-rc3
# 5b57633a 15-Aug-2017 Kuba Mracek <mracek@apple.com>

[clang] Get rid of "%T" expansions

The %T lit expansion expands to a common directory shared between all the tests in the same directory, which is unexpected and unintuitive, and more importantly, i

[clang] Get rid of "%T" expansions

The %T lit expansion expands to a common directory shared between all the tests in the same directory, which is unexpected and unintuitive, and more importantly, it's been a source of subtle race conditions and flaky tests. In https://reviews.llvm.org/D35396, it was agreed that it would be best to simply ban %T and only keep %t, which is unique to each test. When a test needs a temporary directory, it can just create one using mkdir %t.

This patch removes %T in clang.

Differential Revision: https://reviews.llvm.org/D36437

llvm-svn: 310950

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Revision tags: llvmorg-5.0.0-rc2, llvmorg-5.0.0-rc1, llvmorg-4.0.1, llvmorg-4.0.1-rc3, llvmorg-4.0.1-rc2, llvmorg-4.0.1-rc1, llvmorg-4.0.0, llvmorg-4.0.0-rc4, llvmorg-4.0.0-rc3, llvmorg-4.0.0-rc2, llvmorg-4.0.0-rc1, llvmorg-3.9.1, llvmorg-3.9.1-rc3, llvmorg-3.9.1-rc2, llvmorg-3.9.1-rc1, llvmorg-3.9.0, llvmorg-3.9.0-rc3, llvmorg-3.9.0-rc2, llvmorg-3.9.0-rc1
# f42103ce 13-Jun-2016 Taewook Oh <twoh@fb.com>

Use the name of the file on disk to issue a new diagnostic about non-portable #include and #import paths.

Differential Revision: http://reviews.llvm.org/D19843
Corresponding LLVM change: http://revi

Use the name of the file on disk to issue a new diagnostic about non-portable #include and #import paths.

Differential Revision: http://reviews.llvm.org/D19843
Corresponding LLVM change: http://reviews.llvm.org/D19842

Re-commit of r272562 after addressing clang-x86-win2008-selfhost failure.

llvm-svn: 272584

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# e8533670 13-Jun-2016 Taewook Oh <twoh@fb.com>

Use the name of the file on disk to issue a new diagnostic about non-portable #include and #import paths.

Differential Revision: http://reviews.llvm.org/D19843
Corresponding LLVM change: http://revi

Use the name of the file on disk to issue a new diagnostic about non-portable #include and #import paths.

Differential Revision: http://reviews.llvm.org/D19843
Corresponding LLVM change: http://reviews.llvm.org/D19842

Re-commit after addressing issues with of generating too many warnings for Windows and asan test failures.

Patch by Eric Niebler

llvm-svn: 272562

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Revision tags: llvmorg-3.8.1, llvmorg-3.8.1-rc1
# fc5d13d9 03-Jun-2016 Taewook Oh <twoh@fb.com>

Use the name of the file on disk to issue a new diagnostic about non-portable #include and #import paths.

Differential Revision: http://reviews.llvm.org/D19843
Corresponding LLVM change: http://revi

Use the name of the file on disk to issue a new diagnostic about non-portable #include and #import paths.

Differential Revision: http://reviews.llvm.org/D19843
Corresponding LLVM change: http://reviews.llvm.org/D19842

Patch by Eric Niebler

llvm-svn: 271708

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