tools/clang/scripts/update.sh

   1 #!/usr/bin/env bash
   2 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
   3 # Use of this source code is governed by a BSD-style license that can be
   4 # found in the LICENSE file.
   5
   6 # This script will check out llvm and clang into third_party/llvm and build it.
   7
   8 # Do NOT CHANGE this if you don't know what you're doing -- see
   9 # https://code.google.com/p/chromium/wiki/UpdatingClang
  10 # Reverting problematic clang rolls is safe, though.
  11 CLANG_REVISION=233105
  12
  13 # This is incremented when pushing a new build of Clang at the same revision.
  14 CLANG_SUB_REVISION=2
  15
  16 PACKAGE_VERSION="${CLANG_REVISION}-${CLANG_SUB_REVISION}"
  17
  18 THIS_DIR="$(dirname "${0}")"
  19 LLVM_DIR="${THIS_DIR}/../../../third_party/llvm"
  20 LLVM_BUILD_DIR="${LLVM_DIR}/../llvm-build/Release+Asserts"
  21 COMPILER_RT_BUILD_DIR="${LLVM_DIR}/../llvm-build/compiler-rt"
  22 LLVM_BOOTSTRAP_DIR="${LLVM_DIR}/../llvm-bootstrap"
  23 LLVM_BOOTSTRAP_INSTALL_DIR="${LLVM_DIR}/../llvm-bootstrap-install"
  24 CLANG_DIR="${LLVM_DIR}/tools/clang"
  25 COMPILER_RT_DIR="${LLVM_DIR}/compiler-rt"
  26 LIBCXX_DIR="${LLVM_DIR}/projects/libcxx"
  27 LIBCXXABI_DIR="${LLVM_DIR}/projects/libcxxabi"
  28 ANDROID_NDK_DIR="${THIS_DIR}/../../../third_party/android_tools/ndk"
  29 STAMP_FILE="${LLVM_DIR}/../llvm-build/cr_build_revision"
  30 CHROMIUM_TOOLS_DIR="${THIS_DIR}/.."
  31 BINUTILS_DIR="${THIS_DIR}/../../../third_party/binutils"
  32
  33 ABS_CHROMIUM_TOOLS_DIR="${PWD}/${CHROMIUM_TOOLS_DIR}"
  34 ABS_LIBCXX_DIR="${PWD}/${LIBCXX_DIR}"
  35 ABS_LIBCXXABI_DIR="${PWD}/${LIBCXXABI_DIR}"
  36 ABS_LLVM_DIR="${PWD}/${LLVM_DIR}"
  37 ABS_LLVM_BUILD_DIR="${PWD}/${LLVM_BUILD_DIR}"
  38 ABS_COMPILER_RT_DIR="${PWD}/${COMPILER_RT_DIR}"
  39 ABS_BINUTILS_DIR="${PWD}/${BINUTILS_DIR}"
  40
  41 # ${A:-a} returns $A if it's set, a else.
  42 LLVM_REPO_URL=${LLVM_URL:-https://llvm.org/svn/llvm-project}
  43
  44 CDS_URL=https://commondatastorage.googleapis.com/chromium-browser-clang
  45
  46 if [[ -z "$GYP_DEFINES" ]]; then
  47   GYP_DEFINES=
  48 fi
  49 if [[ -z "$GYP_GENERATORS" ]]; then
  50   GYP_GENERATORS=
  51 fi
  52
  53
  54 # Die if any command dies, error on undefined variable expansions.
  55 set -eu
  56
  57
  58 if [[ -n ${LLVM_FORCE_HEAD_REVISION:-''} ]]; then
  59   # Use a real version number rather than HEAD to make sure that
  60   # --print-revision, stamp file logic, etc. all works naturally.
  61   CLANG_REVISION=$(svn info "$LLVM_REPO_URL" \
  62       | grep 'Last Changed Rev' | awk '{ printf $4; }')
  63   PACKAGE_VERSION="${CLANG_REVISION}-0"
  64 fi
  65
  66 OS="$(uname -s)"
  67
  68 # Parse command line options.
  69 if_needed=
  70 force_local_build=
  71 run_tests=
  72 bootstrap=
  73 with_android=yes
  74 chrome_tools="plugins;blink_gc_plugin"
  75 gcc_toolchain=
  76 with_patches=yes
  77
  78 if [[ "${OS}" = "Darwin" ]]; then
  79   with_android=
  80 fi
  81
  82 while [[ $# > 0 ]]; do
  83   case $1 in
  84     --bootstrap)
  85       bootstrap=yes
  86       ;;
  87     --if-needed)
  88       if_needed=yes
  89       ;;
  90     --force-local-build)
  91       force_local_build=yes
  92       ;;
  93     --print-revision)
  94       echo $PACKAGE_VERSION
  95       exit 0
  96       ;;
  97     --run-tests)
  98       run_tests=yes
  99       ;;
 100     --without-android)
 101       with_android=
 102       ;;
 103     --without-patches)
 104       with_patches=
 105       ;;
 106     --with-chrome-tools)
 107       shift
 108       if [[ $# == 0 ]]; then
 109         echo "--with-chrome-tools requires an argument."
 110         exit 1
 111       fi
 112       chrome_tools=$1
 113       ;;
 114     --gcc-toolchain)
 115       shift
 116       if [[ $# == 0 ]]; then
 117         echo "--gcc-toolchain requires an argument."
 118         exit 1
 119       fi
 120       if [[ -x "$1/bin/gcc" ]]; then
 121         gcc_toolchain=$1
 122       else
 123         echo "Invalid --gcc-toolchain: '$1'."
 124         echo "'$1/bin/gcc' does not appear to be valid."
 125         exit 1
 126       fi
 127       ;;
 128
 129     --help)
 130       echo "usage: $0 [--force-local-build] [--if-needed] [--run-tests] "
 131       echo "--bootstrap: First build clang with CC, then with itself."
 132       echo "--force-local-build: Don't try to download prebuilt binaries."
 133       echo "--if-needed: Download clang only if the script thinks it is needed."
 134       echo "--run-tests: Run tests after building. Only for local builds."
 135       echo "--print-revision: Print current clang revision and exit."
 136       echo "--without-android: Don't build ASan Android runtime library."
 137       echo "--with-chrome-tools: Select which chrome tools to build." \
 138            "Defaults to plugins;blink_gc_plugin."
 139       echo "    Example: --with-chrome-tools plugins;empty-string"
 140       echo "--gcc-toolchain: Set the prefix for which GCC version should"
 141       echo "    be used for building. For example, to use gcc in"
 142       echo "    /opt/foo/bin/gcc, use '--gcc-toolchain '/opt/foo"
 143       echo "--without-patches: Don't apply local patches."
 144       echo
 145       exit 1
 146       ;;
 147     *)
 148       echo "Unknown argument: '$1'."
 149       echo "Use --help for help."
 150       exit 1
 151       ;;
 152   esac
 153   shift
 154 done
 155
 156 if [[ -n ${LLVM_FORCE_HEAD_REVISION:-''} ]]; then
 157   force_local_build=yes
 158
 159   # Skip local patches when using HEAD: they probably don't apply anymore.
 160   with_patches=
 161
 162   if ! [[ "$GYP_DEFINES" =~ .*OS=android.* ]]; then
 163     # Only build the Android ASan rt when targetting Android.
 164     with_android=
 165   fi
 166
 167   LLVM_BUILD_TOOLS_DIR="${ABS_LLVM_DIR}/../llvm-build-tools"
 168
 169   if [[ "${OS}" == "Linux" ]] && [[ -z "${gcc_toolchain}" ]]; then
 170     if [[ $(gcc -dumpversion) < "4.7.0" ]]; then
 171       # We need a newer GCC version.
 172       if [[ ! -e "${LLVM_BUILD_TOOLS_DIR}/gcc482" ]]; then
 173         echo "Downloading pre-built GCC 4.8.2..."
 174         mkdir -p "${LLVM_BUILD_TOOLS_DIR}"
 175         curl --fail -L "${CDS_URL}/tools/gcc482.tgz" | \
 176           tar zxf - -C "${LLVM_BUILD_TOOLS_DIR}"
 177         echo Done
 178       fi
 179       gcc_toolchain="${LLVM_BUILD_TOOLS_DIR}/gcc482"
 180     else
 181       # Always set gcc_toolchain; llvm-symbolizer needs the bundled libstdc++.
 182       gcc_toolchain="$(dirname $(dirname $(which gcc)))"
 183     fi
 184   fi
 185
 186   if [[ "${OS}" == "Linux" || "${OS}" == "Darwin" ]]; then
 187     if [[ $(cmake --version | grep -Eo '[0-9.]+') < "3.0" ]]; then
 188       # We need a newer CMake version.
 189       if [[ ! -e "${LLVM_BUILD_TOOLS_DIR}/cmake310" ]]; then
 190         echo "Downloading pre-built CMake 3.10..."
 191         mkdir -p "${LLVM_BUILD_TOOLS_DIR}"
 192         curl --fail -L "${CDS_URL}/tools/cmake310_${OS}.tgz" | \
 193           tar zxf - -C "${LLVM_BUILD_TOOLS_DIR}"
 194         echo Done
 195       fi
 196       export PATH="${LLVM_BUILD_TOOLS_DIR}/cmake310/bin:${PATH}"
 197     fi
 198   fi
 199
 200   echo "LLVM_FORCE_HEAD_REVISION was set; using r${CLANG_REVISION}"
 201 fi
 202
 203 if [[ -n "$if_needed" ]]; then
 204   if [[ "${OS}" == "Darwin" ]]; then
 205     # clang is used on Mac.
 206     true
 207   elif [[ "$GYP_DEFINES" =~ .*(clang|tsan|asan|lsan|msan)=1.* ]]; then
 208     # clang requested via $GYP_DEFINES.
 209     true
 210   elif [[ -d "${LLVM_BUILD_DIR}" ]]; then
 211     # clang previously downloaded, remove third_party/llvm-build to prevent
 212     # updating.
 213     true
 214   elif [[ "${OS}" == "Linux" ]]; then
 215     # Temporarily use clang on linux. Leave a stamp file behind, so that
 216     # this script can remove clang again on machines where it was autoinstalled.
 217     mkdir -p "${LLVM_BUILD_DIR}"
 218     touch "${LLVM_BUILD_DIR}/autoinstall_stamp"
 219     true
 220   else
 221     # clang wasn't needed, not doing anything.
 222     exit 0
 223   fi
 224 fi
 225
 226
 227 # Check if there's anything to be done, exit early if not.
 228 if [[ -f "${STAMP_FILE}" ]]; then
 229   PREVIOUSLY_BUILT_REVISON=$(cat "${STAMP_FILE}")
 230   if [[ -z "$force_local_build" ]] && \
 231        [[ "${PREVIOUSLY_BUILT_REVISON}" = \
 232           "${PACKAGE_VERSION}" ]]; then
 233     echo "Clang already at ${PACKAGE_VERSION}"
 234     exit 0
 235   fi
 236 fi
 237 # To always force a new build if someone interrupts their build half way.
 238 rm -f "${STAMP_FILE}"
 239
 240
 241 if [[ -z "$force_local_build" ]]; then
 242   # Check if there's a prebuilt binary and if so just fetch that. That's faster,
 243   # and goma relies on having matching binary hashes on client and server too.
 244   CDS_FILE="clang-${PACKAGE_VERSION}.tgz"
 245   CDS_OUT_DIR=$(mktemp -d -t clang_download.XXXXXX)
 246   CDS_OUTPUT="${CDS_OUT_DIR}/${CDS_FILE}"
 247   if [ "${OS}" = "Linux" ]; then
 248     CDS_FULL_URL="${CDS_URL}/Linux_x64/${CDS_FILE}"
 249   elif [ "${OS}" = "Darwin" ]; then
 250     CDS_FULL_URL="${CDS_URL}/Mac/${CDS_FILE}"
 251   fi
 252   echo Trying to download prebuilt clang
 253   if which curl > /dev/null; then
 254     curl -L --fail "${CDS_FULL_URL}" -o "${CDS_OUTPUT}" || \
 255         rm -rf "${CDS_OUT_DIR}"
 256   elif which wget > /dev/null; then
 257     wget "${CDS_FULL_URL}" -O "${CDS_OUTPUT}" || rm -rf "${CDS_OUT_DIR}"
 258   else
 259     echo "Neither curl nor wget found. Please install one of these."
 260     exit 1
 261   fi
 262   if [ -f "${CDS_OUTPUT}" ]; then
 263     rm -rf "${LLVM_BUILD_DIR}"
 264     mkdir -p "${LLVM_BUILD_DIR}"
 265     tar -xzf "${CDS_OUTPUT}" -C "${LLVM_BUILD_DIR}"
 266     echo clang "${PACKAGE_VERSION}" unpacked
 267     echo "${PACKAGE_VERSION}" > "${STAMP_FILE}"
 268     rm -rf "${CDS_OUT_DIR}"
 269     exit 0
 270   else
 271     echo Did not find prebuilt clang "${PACKAGE_VERSION}", building
 272   fi
 273 fi
 274
 275 if [[ -n "${with_android}" ]] && ! [[ -d "${ANDROID_NDK_DIR}" ]]; then
 276   echo "Android NDK not found at ${ANDROID_NDK_DIR}"
 277   echo "The Android NDK is needed to build a Clang whose -fsanitize=address"
 278   echo "works on Android. See "
 279   echo "http://code.google.com/p/chromium/wiki/AndroidBuildInstructions for how"
 280   echo "to install the NDK, or pass --without-android."
 281   exit 1
 282 fi
 283
 284 # Check that cmake and ninja are available.
 285 if ! which cmake > /dev/null; then
 286   echo "CMake needed to build clang; please install"
 287   exit 1
 288 fi
 289 if ! which ninja > /dev/null; then
 290   echo "ninja needed to build clang, please install"
 291   exit 1
 292 fi
 293
 294 echo Reverting previously patched files
 295 for i in \
 296       "${CLANG_DIR}/test/Index/crash-recovery-modules.m" \
 297       "${CLANG_DIR}/unittests/libclang/LibclangTest.cpp" \
 298       "${COMPILER_RT_DIR}/lib/asan/asan_rtl.cc" \
 299       "${COMPILER_RT_DIR}/test/asan/TestCases/Linux/new_array_cookie_test.cc" \
 300       "${LLVM_DIR}/test/DebugInfo/gmlt.ll" \
 301       "${LLVM_DIR}/lib/CodeGen/SpillPlacement.cpp" \
 302       "${LLVM_DIR}/lib/CodeGen/SpillPlacement.h" \
 303       "${LLVM_DIR}/lib/Transforms/Instrumentation/MemorySanitizer.cpp" \
 304       "${CLANG_DIR}/test/Driver/env.c" \
 305       "${CLANG_DIR}/lib/Frontend/InitPreprocessor.cpp" \
 306       "${CLANG_DIR}/test/Frontend/exceptions.c" \
 307       "${CLANG_DIR}/test/Preprocessor/predefined-exceptions.m" \
 308       "${LLVM_DIR}/test/Bindings/Go/go.test" \
 309       "${CLANG_DIR}/lib/Parse/ParseExpr.cpp" \
 310       "${CLANG_DIR}/lib/Parse/ParseTemplate.cpp" \
 311       "${CLANG_DIR}/lib/Sema/SemaDeclCXX.cpp" \
 312       "${CLANG_DIR}/lib/Sema/SemaExprCXX.cpp" \
 313       "${CLANG_DIR}/test/SemaCXX/default2.cpp" \
 314       "${CLANG_DIR}/test/SemaCXX/typo-correction-delayed.cpp" \
 315       "${COMPILER_RT_DIR}/lib/sanitizer_common/sanitizer_stoptheworld_linux_libcdep.cc" \
 316       "${COMPILER_RT_DIR}/test/tsan/signal_segv_handler.cc" \
 317       "${COMPILER_RT_DIR}/lib/sanitizer_common/sanitizer_coverage_libcdep.cc" \
 318       ; do
 319   if [[ -e "${i}" ]]; then
 320     rm -f "${i}"  # For unversioned files.
 321     svn revert "${i}"
 322   fi;
 323 done
 324
 325 echo Remove the Clang tools shim dir
 326 CHROME_TOOLS_SHIM_DIR=${ABS_LLVM_DIR}/tools/chrometools
 327 rm -rfv ${CHROME_TOOLS_SHIM_DIR}
 328
 329 echo Getting LLVM r"${CLANG_REVISION}" in "${LLVM_DIR}"
 330 if ! svn co --force "${LLVM_REPO_URL}/llvm/trunk@${CLANG_REVISION}" \
 331                     "${LLVM_DIR}"; then
 332   echo Checkout failed, retrying
 333   rm -rf "${LLVM_DIR}"
 334   svn co --force "${LLVM_REPO_URL}/llvm/trunk@${CLANG_REVISION}" "${LLVM_DIR}"
 335 fi
 336
 337 echo Getting clang r"${CLANG_REVISION}" in "${CLANG_DIR}"
 338 svn co --force "${LLVM_REPO_URL}/cfe/trunk@${CLANG_REVISION}" "${CLANG_DIR}"
 339
 340 # We have moved from building compiler-rt in the LLVM tree, to a separate
 341 # directory. Nuke any previous checkout to avoid building it.
 342 rm -rf "${LLVM_DIR}/projects/compiler-rt"
 343
 344 echo Getting compiler-rt r"${CLANG_REVISION}" in "${COMPILER_RT_DIR}"
 345 svn co --force "${LLVM_REPO_URL}/compiler-rt/trunk@${CLANG_REVISION}" \
 346                "${COMPILER_RT_DIR}"
 347
 348 # clang needs a libc++ checkout, else -stdlib=libc++ won't find includes
 349 # (i.e. this is needed for bootstrap builds).
 350 if [ "${OS}" = "Darwin" ]; then
 351   echo Getting libc++ r"${CLANG_REVISION}" in "${LIBCXX_DIR}"
 352   svn co --force "${LLVM_REPO_URL}/libcxx/trunk@${CLANG_REVISION}" \
 353                  "${LIBCXX_DIR}"
 354 fi
 355
 356 # While we're bundling our own libc++ on OS X, we need to compile libc++abi
 357 # into it too (since OS X 10.6 doesn't have libc++abi.dylib either).
 358 if [ "${OS}" = "Darwin" ]; then
 359   echo Getting libc++abi r"${CLANG_REVISION}" in "${LIBCXXABI_DIR}"
 360   svn co --force "${LLVM_REPO_URL}/libcxxabi/trunk@${CLANG_REVISION}" \
 361                  "${LIBCXXABI_DIR}"
 362 fi
 363
 364 if [[ -n "$with_patches" ]]; then
 365
 366   # Apply patch for tests failing with --disable-pthreads (llvm.org/PR11974)
 367   pushd "${CLANG_DIR}"
 368   cat << 'EOF' |
 369 --- third_party/llvm/tools/clang/test/Index/crash-recovery-modules.m    (revision 202554)
 370 +++ third_party/llvm/tools/clang/test/Index/crash-recovery-modules.m    (working copy)
 371 @@ -12,6 +12,8 @@
 372
 373  // REQUIRES: crash-recovery
 374  // REQUIRES: shell
 375 +// XFAIL: *
 376 +//    (PR11974)
 377
 378  @import Crash;
 379 EOF
 380 patch -p4
 381 popd
 382
 383 pushd "${CLANG_DIR}"
 384 cat << 'EOF' |
 385 --- unittests/libclang/LibclangTest.cpp (revision 215949)
 386 +++ unittests/libclang/LibclangTest.cpp (working copy)
 387 @@ -431,7 +431,7 @@
 388    EXPECT_EQ(0U, clang_getNumDiagnostics(ClangTU));
 389  }
 390
 391 -TEST_F(LibclangReparseTest, ReparseWithModule) {
 392 +TEST_F(LibclangReparseTest, DISABLED_ReparseWithModule) {
 393    const char *HeaderTop = "#ifndef H\n#define H\nstruct Foo { int bar;";
 394    const char *HeaderBottom = "\n};\n#endif\n";
 395    const char *MFile = "#include \"HeaderFile.h\"\nint main() {"
 396 EOF
 397   patch -p0
 398   popd
 399
 400   # Cherry-pick r234010 [sancov] Shrink pc array on Android back to 2**24."
 401   pushd "${COMPILER_RT_DIR}"
 402   cat << 'EOF' |
 403 diff --git a/lib/sanitizer_common/sanitizer_coverage_libcdep.cc b/lib/sanitizer_common/sanitizer_coverage_libcdep.cc
 404 index 4b976fc..cfd9e7e 100644
 405 --- a/lib/sanitizer_common/sanitizer_coverage_libcdep.cc
 406 +++ b/lib/sanitizer_common/sanitizer_coverage_libcdep.cc
 407 @@ -109,7 +109,8 @@ class CoverageData {
 408
 409    // Maximal size pc array may ever grow.
 410    // We MmapNoReserve this space to ensure that the array is contiguous.
 411 -  static const uptr kPcArrayMaxSize = FIRST_32_SECOND_64(1 << 26, 1 << 27);
 412 +  static const uptr kPcArrayMaxSize =
 413 +      FIRST_32_SECOND_64(1 << (SANITIZER_ANDROID ? 24 : 26), 1 << 27);
 414    // The amount file mapping for the pc array is grown by.
 415    static const uptr kPcArrayMmapSize = 64 * 1024;
 416
 417 EOF
 418   patch -p1
 419   popd
 420
 421   # This Go bindings test doesn't work after the bootstrap build on Linux. (PR21552)
 422   pushd "${LLVM_DIR}"
 423   cat << 'EOF' |
 424 Index: test/Bindings/Go/go.test
 425 ===================================================================
 426 --- test/Bindings/Go/go.test    (revision 223109)
 427 +++ test/Bindings/Go/go.test    (working copy)
 428 @@ -1,3 +1,3 @@
 429 -; RUN: llvm-go test llvm.org/llvm/bindings/go/llvm
 430 +; RUN: true
 431
 432  ; REQUIRES: shell
 433 EOF
 434   patch -p0
 435   popd
 436
 437
 438 fi
 439
 440 # Echo all commands.
 441 set -x
 442
 443 # Set default values for CC and CXX if they're not set in the environment.
 444 CC=${CC:-cc}
 445 CXX=${CXX:-c++}
 446
 447 if [[ -n "${gcc_toolchain}" ]]; then
 448   # Use the specified gcc installation for building.
 449   CC="$gcc_toolchain/bin/gcc"
 450   CXX="$gcc_toolchain/bin/g++"
 451   # Set LD_LIBRARY_PATH to make auxiliary targets (tablegen, bootstrap compiler,
 452   # etc.) find the .so.
 453   export LD_LIBRARY_PATH="$(dirname $(${CXX} -print-file-name=libstdc++.so.6))"
 454 fi
 455
 456 CFLAGS=""
 457 CXXFLAGS=""
 458 LDFLAGS=""
 459
 460 # LLVM uses C++11 starting in llvm 3.5. On Linux, this means libstdc++4.7+ is
 461 # needed, on OS X it requires libc++. clang only automatically links to libc++
 462 # when targeting OS X 10.9+, so add stdlib=libc++ explicitly so clang can run on
 463 # OS X versions as old as 10.7.
 464 # TODO(thakis): Some bots are still on 10.6, so for now bundle libc++.dylib.
 465 # Remove this once all bots are on 10.7+, then use --enable-libcpp=yes and
 466 # change deployment_target to 10.7.
 467 deployment_target=""
 468
 469 if [ "${OS}" = "Darwin" ]; then
 470   # When building on 10.9, /usr/include usually doesn't exist, and while
 471   # Xcode's clang automatically sets a sysroot, self-built clangs don't.
 472   CFLAGS="-isysroot $(xcrun --show-sdk-path)"
 473   CPPFLAGS="${CFLAGS}"
 474   CXXFLAGS="-stdlib=libc++ -nostdinc++ -I${ABS_LIBCXX_DIR}/include ${CFLAGS}"
 475
 476   if [[ -n "${bootstrap}" ]]; then
 477     deployment_target=10.6
 478   fi
 479 fi
 480
 481 # Build bootstrap clang if requested.
 482 if [[ -n "${bootstrap}" ]]; then
 483   ABS_INSTALL_DIR="${PWD}/${LLVM_BOOTSTRAP_INSTALL_DIR}"
 484   echo "Building bootstrap compiler"
 485   mkdir -p "${LLVM_BOOTSTRAP_DIR}"
 486   pushd "${LLVM_BOOTSTRAP_DIR}"
 487
 488   cmake -GNinja \
 489       -DCMAKE_BUILD_TYPE=Release \
 490       -DLLVM_ENABLE_ASSERTIONS=ON \
 491       -DLLVM_TARGETS_TO_BUILD=host \
 492       -DLLVM_ENABLE_THREADS=OFF \
 493       -DCMAKE_INSTALL_PREFIX="${ABS_INSTALL_DIR}" \
 494       -DCMAKE_C_COMPILER="${CC}" \
 495       -DCMAKE_CXX_COMPILER="${CXX}" \
 496       -DCMAKE_C_FLAGS="${CFLAGS}" \
 497       -DCMAKE_CXX_FLAGS="${CXXFLAGS}" \
 498       ../llvm
 499
 500   ninja
 501   if [[ -n "${run_tests}" ]]; then
 502     ninja check-all
 503   fi
 504
 505   ninja install
 506   if [[ -n "${gcc_toolchain}" ]]; then
 507     # Copy that gcc's stdlibc++.so.6 to the build dir, so the bootstrap
 508     # compiler can start.
 509     cp -v "$(${CXX} -print-file-name=libstdc++.so.6)" \
 510       "${ABS_INSTALL_DIR}/lib/"
 511   fi
 512
 513   popd
 514   CC="${ABS_INSTALL_DIR}/bin/clang"
 515   CXX="${ABS_INSTALL_DIR}/bin/clang++"
 516
 517   if [[ -n "${gcc_toolchain}" ]]; then
 518     # Tell the bootstrap compiler to use a specific gcc prefix to search
 519     # for standard library headers and shared object file.
 520     CFLAGS="--gcc-toolchain=${gcc_toolchain}"
 521     CXXFLAGS="--gcc-toolchain=${gcc_toolchain}"
 522   fi
 523
 524   echo "Building final compiler"
 525 fi
 526
 527 # Build clang (in a separate directory).
 528 # The clang bots have this path hardcoded in built/scripts/slave/compile.py,
 529 # so if you change it you also need to change these links.
 530 mkdir -p "${LLVM_BUILD_DIR}"
 531 pushd "${LLVM_BUILD_DIR}"
 532
 533 # Build libc++.dylib while some bots are still on OS X 10.6.
 534 if [ "${OS}" = "Darwin" ]; then
 535   rm -rf libcxxbuild
 536   LIBCXXFLAGS="-O3 -std=c++11 -fstrict-aliasing"
 537
 538   # libcxx and libcxxabi both have a file stdexcept.cpp, so put their .o files
 539   # into different subdirectories.
 540   mkdir -p libcxxbuild/libcxx
 541   pushd libcxxbuild/libcxx
 542   ${CXX:-c++} -c ${CXXFLAGS} ${LIBCXXFLAGS} "${ABS_LIBCXX_DIR}"/src/*.cpp
 543   popd
 544
 545   mkdir -p libcxxbuild/libcxxabi
 546   pushd libcxxbuild/libcxxabi
 547   ${CXX:-c++} -c ${CXXFLAGS} ${LIBCXXFLAGS} "${ABS_LIBCXXABI_DIR}"/src/*.cpp -I"${ABS_LIBCXXABI_DIR}/include"
 548   popd
 549
 550   pushd libcxxbuild
 551   ${CC:-cc} libcxx/*.o libcxxabi/*.o -o libc++.1.dylib -dynamiclib \
 552     -nodefaultlibs -current_version 1 -compatibility_version 1 \
 553     -lSystem -install_name @executable_path/libc++.dylib \
 554     -Wl,-unexported_symbols_list,${ABS_LIBCXX_DIR}/lib/libc++unexp.exp \
 555     -Wl,-force_symbols_not_weak_list,${ABS_LIBCXX_DIR}/lib/notweak.exp \
 556     -Wl,-force_symbols_weak_list,${ABS_LIBCXX_DIR}/lib/weak.exp
 557   ln -sf libc++.1.dylib libc++.dylib
 558   popd
 559   LDFLAGS+="-stdlib=libc++ -L${PWD}/libcxxbuild"
 560 fi
 561
 562 # Find the binutils include dir for the gold plugin.
 563 BINUTILS_INCDIR=""
 564 if [ "${OS}" = "Linux" ]; then
 565   BINUTILS_INCDIR="${ABS_BINUTILS_DIR}/Linux_x64/Release/include"
 566 fi
 567
 568
 569 # If building at head, define a macro that plugins can use for #ifdefing
 570 # out code that builds at head, but not at CLANG_REVISION or vice versa.
 571 if [[ -n ${LLVM_FORCE_HEAD_REVISION:-''} ]]; then
 572   CFLAGS="${CFLAGS} -DLLVM_FORCE_HEAD_REVISION"
 573   CXXFLAGS="${CXXFLAGS} -DLLVM_FORCE_HEAD_REVISION"
 574 fi
 575
 576 # Hook the Chromium tools into the LLVM build. Several Chromium tools have
 577 # dependencies on LLVM/Clang libraries. The LLVM build detects implicit tools
 578 # in the tools subdirectory, so install a shim CMakeLists.txt that forwards to
 579 # the real directory for the Chromium tools.
 580 # Note that the shim directory name intentionally has no _ or _. The implicit
 581 # tool detection logic munges them in a weird way.
 582 mkdir -v ${CHROME_TOOLS_SHIM_DIR}
 583 cat > ${CHROME_TOOLS_SHIM_DIR}/CMakeLists.txt << EOF
 584 # Since tools/clang isn't actually a subdirectory, use the two argument version
 585 # to specify where build artifacts go. CMake doesn't allow reusing the same
 586 # binary dir for multiple source dirs, so the build artifacts have to go into a
 587 # subdirectory...
 588 add_subdirectory(\${CHROMIUM_TOOLS_SRC} \${CMAKE_CURRENT_BINARY_DIR}/a)
 589 EOF
 590 rm -fv CMakeCache.txt
 591 MACOSX_DEPLOYMENT_TARGET=${deployment_target} cmake -GNinja \
 592     -DCMAKE_BUILD_TYPE=Release \
 593     -DLLVM_ENABLE_ASSERTIONS=ON \
 594     -DLLVM_ENABLE_THREADS=OFF \
 595     -DLLVM_BINUTILS_INCDIR="${BINUTILS_INCDIR}" \
 596     -DCMAKE_C_COMPILER="${CC}" \
 597     -DCMAKE_CXX_COMPILER="${CXX}" \
 598     -DCMAKE_C_FLAGS="${CFLAGS}" \
 599     -DCMAKE_CXX_FLAGS="${CXXFLAGS}" \
 600     -DCMAKE_EXE_LINKER_FLAGS="${LDFLAGS}" \
 601     -DCMAKE_SHARED_LINKER_FLAGS="${LDFLAGS}" \
 602     -DCMAKE_MODULE_LINKER_FLAGS="${LDFLAGS}" \
 603     -DCMAKE_INSTALL_PREFIX="${ABS_LLVM_BUILD_DIR}" \
 604     -DCHROMIUM_TOOLS_SRC="${ABS_CHROMIUM_TOOLS_DIR}" \
 605     -DCHROMIUM_TOOLS="${chrome_tools}" \
 606     "${ABS_LLVM_DIR}"
 607 env
 608
 609 if [[ -n "${gcc_toolchain}" ]]; then
 610   # Copy in the right stdlibc++.so.6 so clang can start.
 611   mkdir -p lib
 612   cp -v "$(${CXX} ${CXXFLAGS} -print-file-name=libstdc++.so.6)" lib/
 613 fi
 614
 615 ninja
 616 # If any Chromium tools were built, install those now.
 617 if [[ -n "${chrome_tools}" ]]; then
 618   ninja cr-install
 619 fi
 620
 621 STRIP_FLAGS=
 622 if [ "${OS}" = "Darwin" ]; then
 623   # See http://crbug.com/256342
 624   STRIP_FLAGS=-x
 625
 626   cp libcxxbuild/libc++.1.dylib bin/
 627 fi
 628 strip ${STRIP_FLAGS} bin/clang
 629 popd
 630
 631 # Build compiler-rt out-of-tree.
 632 mkdir -p "${COMPILER_RT_BUILD_DIR}"
 633 pushd "${COMPILER_RT_BUILD_DIR}"
 634
 635 rm -fv CMakeCache.txt
 636 MACOSX_DEPLOYMENT_TARGET=${deployment_target} cmake -GNinja \
 637     -DCMAKE_BUILD_TYPE=Release \
 638     -DLLVM_ENABLE_ASSERTIONS=ON \
 639     -DLLVM_ENABLE_THREADS=OFF \
 640     -DCMAKE_C_COMPILER="${CC}" \
 641     -DCMAKE_CXX_COMPILER="${CXX}" \
 642     -DLLVM_CONFIG_PATH="${ABS_LLVM_BUILD_DIR}/bin/llvm-config" \
 643     "${ABS_COMPILER_RT_DIR}"
 644
 645 ninja
 646
 647 # Copy selected output to the main tree.
 648 # Darwin doesn't support cp --parents, so pipe through tar instead.
 649 CLANG_VERSION=$("${ABS_LLVM_BUILD_DIR}/bin/clang" --version | \
 650      sed -ne 's/clang version \([0-9]\.[0-9]\.[0-9]\).*/\1/p')
 651 ABS_LLVM_CLANG_LIB_DIR="${ABS_LLVM_BUILD_DIR}/lib/clang/${CLANG_VERSION}"
 652 tar -c *blacklist.txt | tar -C ${ABS_LLVM_CLANG_LIB_DIR} -xv
 653 tar -c include/sanitizer | tar -C ${ABS_LLVM_CLANG_LIB_DIR} -xv
 654 if [[ "${OS}" = "Darwin" ]]; then
 655   tar -c lib/darwin | tar -C ${ABS_LLVM_CLANG_LIB_DIR} -xv
 656 else
 657   tar -c lib/linux | tar -C ${ABS_LLVM_CLANG_LIB_DIR} -xv
 658 fi
 659
 660 popd
 661
 662 if [[ -n "${with_android}" ]]; then
 663   # Make a standalone Android toolchain.
 664   ${ANDROID_NDK_DIR}/build/tools/make-standalone-toolchain.sh \
 665       --platform=android-14 \
 666       --install-dir="${LLVM_BUILD_DIR}/android-toolchain" \
 667       --system=linux-x86_64 \
 668       --stl=stlport \
 669       --toolchain=arm-linux-androideabi-4.9
 670
 671   # Android NDK r9d copies a broken unwind.h into the toolchain, see
 672   # http://crbug.com/357890
 673   rm -v "${LLVM_BUILD_DIR}"/android-toolchain/include/c++/*/unwind.h
 674
 675   # Build ASan runtime for Android in a separate build tree.
 676   mkdir -p ${LLVM_BUILD_DIR}/android
 677   pushd ${LLVM_BUILD_DIR}/android
 678   rm -fv CMakeCache.txt
 679   MACOSX_DEPLOYMENT_TARGET=${deployment_target} cmake -GNinja \
 680       -DCMAKE_BUILD_TYPE=Release \
 681       -DLLVM_ENABLE_ASSERTIONS=ON \
 682       -DLLVM_ENABLE_THREADS=OFF \
 683       -DCMAKE_C_COMPILER=${PWD}/../bin/clang \
 684       -DCMAKE_CXX_COMPILER=${PWD}/../bin/clang++ \
 685       -DLLVM_CONFIG_PATH=${PWD}/../bin/llvm-config \
 686       -DCMAKE_C_FLAGS="--target=arm-linux-androideabi --sysroot=${PWD}/../android-toolchain/sysroot -B${PWD}/../android-toolchain" \
 687       -DCMAKE_CXX_FLAGS="--target=arm-linux-androideabi --sysroot=${PWD}/../android-toolchain/sysroot -B${PWD}/../android-toolchain" \
 688       -DANDROID=1 \
 689       "${ABS_COMPILER_RT_DIR}"
 690   ninja libclang_rt.asan-arm-android.so
 691
 692   # And copy it into the main build tree.
 693   cp "$(find -name libclang_rt.asan-arm-android.so)" "${ABS_LLVM_CLANG_LIB_DIR}/lib/linux/"
 694   popd
 695 fi
 696
 697 if [[ -n "$run_tests" ]]; then
 698   # Run Chrome tool tests.
 699   ninja -C "${LLVM_BUILD_DIR}" cr-check-all
 700   # Run the LLVM and Clang tests.
 701   ninja -C "${LLVM_BUILD_DIR}" check-all
 702 fi
 703
 704 # After everything is done, log success for this revision.
 705 echo "${PACKAGE_VERSION}" > "${STAMP_FILE}"