| This directory consumes tools from other repositories for use on the | 
 | bots. To update to newer revisions, follow these instructions: | 
 |  | 
 | DEPS: Set all revisions to those used in Chromium, found at | 
 |    https://chromium.googlesource.com/chromium/src/+/master/DEPS (Search for the | 
 |    corresponding repository name.) | 
 |  | 
 | go/bootstrap.py: Set TOOLSET_VERSION to the latest release of Go, found at | 
 |     https://golang.org/dl/. | 
 |  | 
 | update_clang.py: Set CLANG_REVISION and CLANG_SUB_REVISION to the values used in | 
 |     Chromium, found at | 
 |     https://chromium.googlesource.com/chromium/src/+/master/tools/clang/scripts/update.py | 
 |  | 
 | vs_toolchain.py: Update _GetDesiredVsToolchainHashes from Chromium, found at | 
 |     https://chromium.googlesource.com/chromium/src/+/master/build/vs_toolchain.py | 
 |     This may require taking other updates to that file. (Don't remove MSVC | 
 |     versions if BoringSSL still needs to support them.) | 
 |  | 
 | The .sha1 files correspond to files downloaded from Google Cloud Storage. To | 
 | update, place the updated files in their intended location and run: | 
 |  | 
 |     upload_to_google_storage.py -b chromium-tools FILE | 
 |  | 
 | cmake-linux64.tar.gz: Download the latest CMake source tarball, found at | 
 |     https://cmake.org/download/. Build it with: | 
 |  | 
 |         ./bootstrap --prefix=$PWD/cmake-linux64 && make && make install | 
 |         tar -czf cmake-linux64.tar.gz cmake-linux64/ | 
 |  | 
 |     The current revision was built against cmake-3.5.0.tar.gz. | 
 |  | 
 | cmake-mac.tar.gz: Follow the same instructions as above on a Mac, but replace | 
 |     cmake-linux64 with cmake-mac. | 
 |  | 
 |     The current revision was built against cmake-3.5.0.tar.gz. | 
 |  | 
 | cmake-win32.zip: Update to the latest prebuilt release of CMake, found at | 
 |     https://cmake.org/download/. Use the file labeled "Windows ZIP". The | 
 |     download will be named cmake-VERSION-win32-x86.zip. | 
 |  | 
 |     The current revision is cmake-3.5.0-win32-x86.zip. | 
 |  | 
 | perl-win32.zip: Update to the latest 32-bit prebuilt "PortableZip" edition of | 
 |     Strawberry Perl, found at http://strawberryperl.com/releases.html. The | 
 |     download will be named strawberry-perl-VERSION-32bit-portable.zip. | 
 |  | 
 |     The current revision is strawberry-perl-5.22.1.2-32bit-portable.zip. | 
 |  | 
 | yasm-win32.exe: Update to the appropriate release of Yasm. Use the same version | 
 |     as Chromium, found at | 
 |     https://chromium.googlesource.com/chromium/src/+/master/third_party/yasm/README.chromium | 
 |     Use the release at http://yasm.tortall.net/Download.html labeled | 
 |     "Win32 .exe". The download will be named yasm-VERSION-win32.exe. | 
 |  | 
 |     The current revision is yasm-1.3.0-win32.exe. | 
 |  | 
 | Finally, update sde-linux64.tar.bz2 by downloading the latet release from intel | 
 | at | 
 | https://software.intel.com/en-us/articles/intel-software-development-emulator, | 
 | but upload it with the following command. (Note the bucket is different.) | 
 |  | 
 |     upload_to_google_storage.py -b chrome-boringssl-sde sde-linux64.tar.bz2 | 
 |  | 
 | The current revision is sde-external-8.5.0-2017-06-08-lin.tar.bz2. |