Update //third_party/protobuf to version 3.

third_party/protobuf/protoc-artifacts/build-protoc.sh

Index: third_party/protobuf/protoc-artifacts/build-protoc.sh
diff --git a/third_party/protobuf/protoc-artifacts/build-protoc.sh b/third_party/protobuf/protoc-artifacts/build-protoc.sh
new file mode 100755
index 0000000000000000000000000000000000000000..2f67c5083720dbda0db6081daf5afe313dbcc527
--- /dev/null
+++ b/third_party/protobuf/protoc-artifacts/build-protoc.sh
@@ -0,0 +1,225 @@
+#!/bin/bash
+
+# Builds protoc executable into target/protoc.exe
+# To be run from Maven.
+# Usage: build-protoc.sh <OS> <ARCH>
+# <OS> and <ARCH> are ${os.detected.name} and ${os.detected.arch} from os-maven-plugin
+OS=$1
+ARCH=$2
+
+if [[ $# < 2 ]]; then
+  echo "No arguments provided. This script is intended to be run from Maven."
+  exit 1
+fi
+
+# Under Cygwin, bash doesn't have these in PATH when called from Maven which
+# runs in Windows version of Java.
+export PATH="/bin:/usr/bin:$PATH"
+
+############################################################################
+# Helper functions
+############################################################################
+E_PARAM_ERR=98
+E_ASSERT_FAILED=99
+
+# Usage:
+fail()
+{
+  echo "ERROR: $1"
+  echo
+  exit $E_ASSERT_FAILED
+}
+
+# Usage: assertEq VAL1 VAL2 $LINENO
+assertEq ()
+{
+  lineno=$3
+  if [ -z "$lineno" ]; then
+    echo "lineno not given"
+    exit $E_PARAM_ERR
+  fi
+
+  if [[ "$1" != "$2" ]]; then
+    echo "Assertion failed:  \"$1\" == \"$2\""
+    echo "File \"$0\", line $lineno"    # Give name of file and line number.
+    exit $E_ASSERT_FAILED
+  fi
+}
+
+# Checks the artifact is for the expected architecture
+# Usage: checkArch <path-to-protoc>
+checkArch ()
+{
+  echo
+  echo "Checking file format ..."
+  if [[ "$OS" == windows || "$OS" == linux ]]; then
+    format="$(objdump -f "$1" | grep -o "file format .*$" | grep -o "[^ ]*$")"
+    echo Format=$format
+    if [[ "$OS" == linux ]]; then
+      if [[ "$ARCH" == x86_32 ]]; then
+        assertEq $format "elf32-i386" $LINENO
+      elif [[ "$ARCH" == x86_64 ]]; then
+        assertEq $format "elf64-x86-64" $LINENO
+      else
+        fail "Unsupported arch: $ARCH"
+      fi
+    else
+      # $OS == windows
+      if [[ "$ARCH" == x86_32 ]]; then
+        assertEq $format "pei-i386" $LINENO
+      elif [[ "$ARCH" == x86_64 ]]; then
+        assertEq $format "pei-x86-64" $LINENO
+      else
+        fail "Unsupported arch: $ARCH"
+      fi
+    fi
+  elif [[ "$OS" == osx ]]; then
+    format="$(file -b "$1" | grep -o "[^ ]*$")"
+    echo Format=$format
+    if [[ "$ARCH" == x86_32 ]]; then
+      assertEq $format "i386" $LINENO
+    elif [[ "$ARCH" == x86_64 ]]; then
+      assertEq $format "x86_64" $LINENO
+    else
+      fail "Unsupported arch: $ARCH"
+    fi
+  else
+    fail "Unsupported system: $OS"
+  fi
+  echo
+}
+
+# Checks the dependencies of the artifact. Artifacts should only depend on
+# system libraries.
+# Usage: checkDependencies <path-to-protoc>
+checkDependencies ()
+{
+  if [[ "$OS" == windows ]]; then
+    dump_cmd='objdump -x '"$1"' | fgrep "DLL Name"'
+    white_list="KERNEL32\.dll\|msvcrt\.dll"
+  elif [[ "$OS" == linux ]]; then
+    dump_cmd='ldd '"$1"
+    if [[ "$ARCH" == x86_32 ]]; then
+      white_list="linux-gate\.so\.1\|libpthread\.so\.0\|libm\.so\.6\|libc\.so\.6\|ld-linux\.so\.2"
+    elif [[ "$ARCH" == x86_64 ]]; then
+      white_list="linux-vdso\.so\.1\|libpthread\.so\.0\|libm\.so\.6\|libc\.so\.6\|ld-linux-x86-64\.so\.2"
+    fi
+  elif [[ "$OS" == osx ]]; then
+    dump_cmd='otool -L '"$1"' | fgrep dylib'
+    white_list="libz\.1\.dylib\|libstdc++\.6\.dylib\|libSystem\.B\.dylib"
+  fi
+  if [[ -z "$white_list" || -z "$dump_cmd" ]]; then
+    fail "Unsupported platform $OS-$ARCH."
+  fi
+  echo "Checking for expected dependencies ..."
+  eval $dump_cmd | grep -i "$white_list" || fail "doesn't show any expected dependencies"
+  echo "Checking for unexpected dependencies ..."
+  eval $dump_cmd | grep -i -v "$white_list"
+  ret=$?
+  if [[ $ret == 0 ]]; then
+    fail "found unexpected dependencies (listed above)."
+  elif [[ $ret != 1 ]]; then
+    fail "Error when checking dependencies."
+  fi  # grep returns 1 when "not found", which is what we expect
+  echo "Dependencies look good."
+  echo
+}
+############################################################################
+
+echo "Building protoc, OS=$OS ARCH=$ARCH"
+
+# Nested double quotes are unintuitive, but it works.
+cd "$(dirname "$0")"
+
+WORKING_DIR=$(pwd)
+CONFIGURE_ARGS="--disable-shared"
+
+MAKE_TARGET="protoc"
+if [[ "$OS" == windows ]]; then
+  MAKE_TARGET="${MAKE_TARGET}.exe"
+fi
+
+# Override the default value set in configure.ac that has '-g' which produces
+# huge binary.
+CXXFLAGS="-DNDEBUG"
+LDFLAGS=""
+
+if [[ "$(uname)" == CYGWIN* ]]; then
+  assertEq "$OS" windows $LINENO
+  # Use mingw32 compilers because executables produced by Cygwin compiler
+  # always have dependency on Cygwin DLL.
+  if [[ "$ARCH" == x86_64 ]]; then
+    CONFIGURE_ARGS="$CONFIGURE_ARGS --host=x86_64-w64-mingw32"
+  elif [[ "$ARCH" == x86_32 ]]; then
+    CONFIGURE_ARGS="$CONFIGURE_ARGS --host=i686-pc-mingw32"
+  else
+    fail "Unsupported arch by CYGWIN: $ARCH"
+  fi
+elif [[ "$(uname)" == MINGW32* ]]; then
+  assertEq "$OS" windows $LINENO
+  assertEq "$ARCH" x86_32 $LINENO
+elif [[ "$(uname)" == MINGW64* ]]; then
+  assertEq "$OS" windows $LINENO
+  assertEq "$ARCH" x86_64 $LINENO
+elif [[ "$(uname)" == Linux* ]]; then
+  if [[ "$OS" == linux ]]; then
+    if [[ "$ARCH" == x86_64 ]]; then
+      CXXFLAGS="$CXXFLAGS -m64"
+    elif [[ "$ARCH" == x86_32 ]]; then
+      CXXFLAGS="$CXXFLAGS -m32"
+    else
+      fail "Unsupported arch: $ARCH"
+    fi
+  elif [[ "$OS" == windows ]]; then
+    # Cross-compilation for Windows
+    # TODO(zhangkun83) MinGW 64 always adds dependency on libwinpthread-1.dll,
+    # which is undesirable for repository deployment.
+    CONFIGURE_ARGS="$CONFIGURE_ARGS"
+    if [[ "$ARCH" == x86_64 ]]; then
+      CONFIGURE_ARGS="$CONFIGURE_ARGS --host=x86_64-w64-mingw32"
+    elif [[ "$ARCH" == x86_32 ]]; then
+      CONFIGURE_ARGS="$CONFIGURE_ARGS --host=i686-w64-mingw32"
+    else
+      fail "Unsupported arch: $ARCH"
+    fi
+  else
+    fail "Cannot build $OS on $(uname)"
+  fi
+elif [[ "$(uname)" == Darwin* ]]; then
+  assertEq "$OS" osx $LINENO
+  # Make the binary compatible with OSX 10.7 and later
+  CXXFLAGS="$CXXFLAGS -mmacosx-version-min=10.7"
+  if [[ "$ARCH" == x86_64 ]]; then
+    CXXFLAGS="$CXXFLAGS -m64"
+  elif [[ "$ARCH" == x86_32 ]]; then
+    CXXFLAGS="$CXXFLAGS -m32"
+  else
+    fail "Unsupported arch: $ARCH"
+  fi
+else
+  fail "Unsupported system: $(uname)"
+fi
+
+# Statically link libgcc and libstdc++.
+# -s to produce stripped binary.
+# And they don't work under Mac.
+if [[ "$OS" != osx ]]; then
+  LDFLAGS="$LDFLAGS -static-libgcc -static-libstdc++ -s"
+fi
+
+export CXXFLAGS LDFLAGS
+
+TARGET_FILE=target/protoc.exe
+
+cd "$WORKING_DIR"/.. && ./configure $CONFIGURE_ARGS &&
+  cd src && make clean && make google/protobuf/stubs/pbconfig.h $MAKE_TARGET &&
+  cd "$WORKING_DIR" && mkdir -p target &&
+  (cp ../src/protoc $TARGET_FILE || cp ../src/protoc.exe $TARGET_FILE) ||
+  exit 1
+
+if [[ "$OS" == osx ]]; then
+  # Since Mac linker doesn't accept "-s", we need to run strip
+  strip $TARGET_FILE || exit 1
+fi
+
+checkArch $TARGET_FILE && checkDependencies $TARGET_FILE