downloads: upgrade LLVM/Clang to 12.0.0

Released just a few minutes ago.

It looks like the new version requires Python 3. So we install that
instead of Python 2 in the build environment.

Author: indygreg

cpython-unix/build-clang-linux64.sh

@@ -77,6 +77,11 @@ pushd llvm/projects/libcxxabi
 tar --strip-components=1 -xf ${ROOT}/libcxxabi-${LIBCXXABI_VERSION}.src.tar.xz
 popd
 
+mkdir libunwind
+pushd libunwind
+tar --strip-components=1 -xf ${ROOT}/libunwind-${LIBUNWIND_VERSION}.src.tar.xz
+popd
+
 mkdir llvm-objdir
 pushd llvm-objdir
 

cpython-unix/build.py

@@ -314,6 +314,7 @@ def build_clang(client, image, host_platform):
     llvm_archive = download_entry("llvm", DOWNLOADS_PATH)
     libcxx_archive = download_entry("libc++", DOWNLOADS_PATH)
     libcxxabi_archive = download_entry("libc++abi", DOWNLOADS_PATH)
+    libunwind_archive = download_entry("libunwind", DOWNLOADS_PATH)
 
     with build_environment(client, image) as build_env:
         install_sccache(build_env)
@@ -328,6 +329,7 @@ def build_clang(client, image, host_platform):
             llvm_archive,
             libcxx_archive,
             libcxxabi_archive,
+            libunwind_archive,
         ):
             build_env.copy_file(a)
 
@@ -344,6 +346,7 @@ def build_clang(client, image, host_platform):
             "GCC_VERSION": DOWNLOADS["gcc"]["version"],
             "LIBCXX_VERSION": DOWNLOADS["libc++"]["version"],
             "LIBCXXABI_VERSION": DOWNLOADS["libc++abi"]["version"],
+            "LIBUNWIND_VERSION": DOWNLOADS["libunwind"]["version"],
             "LLD_VERSION": DOWNLOADS["lld"]["version"],
             "LLVM_VERSION": DOWNLOADS["llvm"]["version"],
         }

cpython-unix/clang.Dockerfile

@@ -3,7 +3,7 @@ RUN apt-get install \
     libc6-dev \
     libc6-dev:i386 \
     patch \
-    python \
+    python3 \
     tar \
     xz-utils \
     unzip \

pythonbuild/downloads.py

@@ -29,16 +29,16 @@
         "license_file": "LICENSE.bzip2.txt",
     },
     "clang": {
-        "url": "https://github.com/llvm/llvm-project/releases/download/llvmorg-11.1.0/clang-11.1.0.src.tar.xz",
-        "size": 14850272,
-        "sha256": "0a8288f065d1f57cb6d96da4d2965cbea32edc572aa972e466e954d17148558b",
-        "version": "11.1.0",
+        "url": "https://github.com/llvm/llvm-project/releases/download/llvmorg-12.0.0/clang-12.0.0.src.tar.xz",
+        "size": 15321640,
+        "sha256": "e26e452e91d4542da3ebbf404f024d3e1cbf103f4cd110c26bf0a19621cca9ed",
+        "version": "12.0.0",
     },
     "clang-compiler-rt": {
-        "url": "https://github.com/llvm/llvm-project/releases/download/llvmorg-11.1.0/compiler-rt-11.1.0.src.tar.xz",
-        "size": 2135988,
-        "sha256": "def1fc00c764cd3abbba925c712ac38860a756a43b696b291f46fee09e453274",
-        "version": "11.1.0",
+        "url": "https://github.com/llvm/llvm-project/releases/download/llvmorg-12.0.0/compiler-rt-12.0.0.src.tar.xz",
+        "size": 2201104,
+        "sha256": "85a8cd0a62413eaa0457d8d02f8edac38c4dc0c96c00b09dc550260c23268434",
+        "version": "12.0.0",
     },
     "cmake-linux-bin": {
         "url": "https://github.com/Kitware/CMake/releases/download/v3.19.2/cmake-3.19.2-Linux-x86_64.tar.gz",
@@ -135,16 +135,16 @@
         "version": "1.0.7",
     },
     "libc++": {
-        "url": "https://github.com/llvm/llvm-project/releases/download/llvmorg-11.1.0/libcxx-11.1.0.src.tar.xz",
-        "size": 1871804,
-        "sha256": "bb233d250ed7eaa05c73eaf81ef0f9ee3fac9d8fc0c3d38a7a7383f82ed6f8e5",
-        "version": "11.1.0",
+        "url": "https://github.com/llvm/llvm-project/releases/download/llvmorg-12.0.0/libcxx-12.0.0.src.tar.xz",
+        "size": 1880864,
+        "sha256": "7dcb75ca4f6aae2c677d128460c48a57398c8b6791b77b74bea7cf9e04e7c3f1",
+        "version": "12.0.0",
     },
     "libc++abi": {
-        "url": "https://github.com/llvm/llvm-project/releases/download/llvmorg-11.1.0/libcxxabi-11.1.0.src.tar.xz",
-        "size": 553032,
-        "sha256": "143193ed80f8fa4d85211d6704a90789fb36aa65b69fd0c382a9f05ec370ecab",
-        "version": "11.1.0",
+        "url": "https://github.com/llvm/llvm-project/releases/download/llvmorg-12.0.0/libcxxabi-12.0.0.src.tar.xz",
+        "size": 552940,
+        "sha256": "6ab8e8cd148a7d5103067e05c36e36ef36e27634fc8e73b5712853c9affe75b1",
+        "version": "12.0.0",
     },
     "libedit": {
         "url": "https://thrysoee.dk/editline/libedit-20210216-3.1.tar.gz",
@@ -179,6 +179,12 @@
         "licenses": ["OpenSSL"],
         "license_file": "LICENSE.libressl.txt",
     },
+    "libunwind": {
+        "url": "https://github.com/llvm/llvm-project/releases/download/llvmorg-12.0.0/libunwind-12.0.0.src.tar.xz",
+        "size": 98344,
+        "sha256": "9ed2a5b28853f7f58be9d04836ff43d6e4132df5a2c058b690dc3e9d75bd1cf5",
+        "version": "12.0.0",
+    },
     "libX11": {
         "url": "ftp://mirror.csclub.uwaterloo.ca/x.org/pub/current/src/lib/libX11-1.6.8.tar.gz",
         "size": 3144482,
@@ -207,16 +213,16 @@
         "license_file": "LICENSE.libxcb.txt",
     },
     "lld": {
-        "url": "https://github.com/llvm/llvm-project/releases/download/llvmorg-11.1.0/lld-11.1.0.src.tar.xz",
-        "size": 1237068,
-        "sha256": "017a788cbe1ecc4a949abf10755870519086d058a2e99f438829aef24f0c66ce",
-        "version": "11.1.0",
+        "url": "https://github.com/llvm/llvm-project/releases/download/llvmorg-12.0.0/lld-12.0.0.src.tar.xz",
+        "size": 1351536,
+        "sha256": "2cb7d497f3ce33ce8a2c50ad26ec93a8c45f57268d4d96953cd0f25566f753fd",
+        "version": "12.0.0",
     },
     "llvm": {
-        "url": "https://github.com/llvm/llvm-project/releases/download/llvmorg-11.1.0/llvm-11.1.0.src.tar.xz",
-        "size": 38915280,
-        "sha256": "ce8508e318a01a63d4e8b3090ab2ded3c598a50258cc49e2625b9120d4c03ea5",
-        "version": "11.1.0",
+        "url": "https://github.com/llvm/llvm-project/releases/download/llvmorg-12.0.0/llvm-12.0.0.src.tar.xz",
+        "size": 42876732,
+        "sha256": "49dc47c8697a1a0abd4ee51629a696d7bfe803662f2a7252a3b16fc75f3a8b50",
+        "version": "12.0.0",
     },
     "mpc": {
         "url": "http://www.multiprecision.org/downloads/mpc-1.0.3.tar.gz",