Vcpkg: [vcpkg - bootstrap-vcpkg.sh] clang and gcc - Unknown escape sequence in PR #12976 updated sources

[StarGate-One]

Describe the bug
Unknown escape sequence warnings when running bootstrap-vcpkg.sh

Environment

• OS: [Linux - openSUSE 15.2 WSL2 and Hyper-V]
• Compiler: gcc (SUSE Linux) 9.3.1 20200406 [revision 6db837a5288ee3ca5ec504fbd5a765817e556ac2]

To Reproduce
Steps to reproduce the behavior:

1. >$ git pull
2. >$ ./bootstrap-vcpkg.sh --disableMetrics
   -- The CXX compiler identification is GNU 9.3.1
   -- Check for working CXX compiler: /usr/bin/c++
   -- Check for working CXX compiler: /usr/bin/c++ - works
   -- Detecting CXX compiler ABI info
   -- Detecting CXX compiler ABI info - done
   -- Detecting CXX compile features
   -- Detecting CXX compile features - done
   -- Detecting the C++ compiler in use
   -- Detecting the C++ compiler in use - gcc
   -- Detecting the C++ standard library
   -- Detecting the C++ standard library - libstdc++
   -- Detecting how to use the C++ filesystem library
   -- Detecting how to use the C++ filesystem library -
   -- Looking for C++ include pthread.h
   -- Looking for C++ include pthread.h - found
   -- Performing Test CMAKE_HAVE_LIBC_PTHREAD
   -- Performing Test CMAKE_HAVE_LIBC_PTHREAD - Failed
   -- Check if compiler accepts -pthread
   -- Check if compiler accepts -pthread - yes
   -- Found Threads: TRUE
   -- Configuring done
   -- Generating done
   -- Build files have been written to: /home/ac-130h/git/vcpkg/toolsrc/build.rel
   [0/2] Re-checking globbed directories...
   [27/80] Building CXX object CMakeFiles/vcpkglib.dir/src/vcpkg/build.cpp.o
   ../src/vcpkg/build.cpp: In function ‘std::string vcpkg::Build::create_user_troubleshooting_message(const vcpkg::PackageSpec&)’:
   ../src/vcpkg/build.cpp:1092:33: warning: unknown escape sequence: '\/'
   1092 | auto vcpkg_update_cmd = ".\/vcpkg";
   | ^~~~
   [48/80] Building CXX object CMakeFiles/vcpkglib.dir/src/vcpkg/commands.version.cpp.o
   ../src/vcpkg/commands.version.cpp: In function ‘void vcpkg::Commands::Version::warn_if_vcpkg_version_mismatch(const vcpkg::VcpkgPaths&)’:
   ../src/vcpkg/commands.version.cpp:67:38: warning: unknown escape sequence: '\/'
   67 | auto bootstrap = ".\/bootstrap-vcpkg.sh";
   | ^~~~~
   [57/80] Building CXX object CMakeFiles/vcpkglib.dir/src/vcpkg/dependencies.cpp.o
   ../src/vcpkg/dependencies.cpp: In member function ‘vcpkg::Dependencies::{anonymous}::Cluster& vcpkg::Dependencies::ClusterGraph::get(const vcpkg::InstalledPackageView&)’:
   ../src/vcpkg/dependencies.cpp:263:41: warning: unknown escape sequence: '\/'
   263 | auto vcpkg_remove_cmd = ".\/vcpkg";
   | ^~~~
   [69/80] Building CXX object CMakeFiles/vcpkglib.dir/src/vcpkg/update.cpp.o
   ../src/vcpkg/update.cpp: In function ‘void vcpkg::Update::perform_and_exit(const vcpkg::VcpkgCmdArguments&, const vcpkg::VcpkgPaths&)’:
   ../src/vcpkg/update.cpp:81:30: warning: unknown escape sequence: '\/'
   81 | auto vcpkg_cmd = ".\/vcpkg";
   | ^~~~
   [75/80] Building CXX object CMakeFiles/vcpkglib.dir/src/vcpkg/sourceparagraph.cpp.o
   ../src/vcpkg/sourceparagraph.cpp: In function ‘void vcpkg::print_error_message(vcpkg::Span >)’:
   ../src/vcpkg/sourceparagraph.cpp:185:30: warning: unknown escape sequence: '\/'
   185 | auto bootstrap = ".\/bootstrap-vcpkg.sh";
   | ^~~~~~~
   [80/80] Linking CXX executable vcpkg

Expected behavior
./bootstrap-vcpkg.sh should run with no errors/warnings.

Failure logs

• No Logs

Additional context
Ran bootstrap-vcpkg.sh after yesterday's changes (08/19/2020) there were no errors, after today's (08/20/2020) updates the warnings/errors occur. No updates to openSUSE have been made since Saturday (08/15/2020).

[StarGate-One]

Update, to rule out a corrupted fork and/or instance:

1. I deleted my fork copy of vcpkg and re-forked it again
2. I deleted the vcpkg instances from both the WSL2 and Hyper-V openSUSE linux machines
3. I re-cloned the vcpkg instance from my forked copy
4. I ran bootstrap-vcpkg.sh --disableMetrics on both with same errors.
5. My Windows instances of vcpkg (cloned from the same forked copy of vcpkg) did not have these errors when running .\bootstrap-vcpkg.bat -verbose -disableMetrics -win64 -withVSPath "'%VCPKG_VISUAL_STUDIO_PATH%'" 2 each one prod, one test for each VS2017 and VS2019

[StarGate-One]

See https://github.com/microsoft/vcpkg/commit/680b2928a1b7173f7fcb420612f5536a192f9ca3#r41619715 this was brought up has been identified in the original PR #12976 by @qis but somehow was not corrected before these changes were committed to master???
I stand corrected.

[qis]

@StarGate-One Nah, I sneaked in that comment after reading those warnings when compiling master. It looked harmless and I was too lazy to create a PR. ^_^

[StarGate-One]

@StarGate-One Nah, I sneaked in that comment after reading those warnings when compiling master. It looked harmless and I was too lazy to create a PR. ^_^

LOL - but I personally think with the introduction of the "new warnings" should have been caught and corrected before it was committed ^_^.

.

[PhoebeHui]

@StarGate-One, It's my fault, sorry for the mistake!

Fixed by PR https://github.com/microsoft/vcpkg/pull/13043

[PhoebeHui]

The PR has been merged, please get latest source and try again.

[StarGate-One]

Thank you very much @PhoebeHui. Have a wonderful day.