Add my build script

Signed-off-by: Jeremy Huddleston Sequoia <jeremyhu@apple.com>

build.sh

@@ -0,0 +1,107 @@
+#!/bin/sh -e
+
+if [[ $(arch) == "arm64" ]] ; then
+    echo "Re-execing build using Rosetta." >&2
+    exec arch -x86_64 ${0} "${@}"
+fi
+
+SDK_NAME=macosx
+
+CONCURRENCY=$(sysctl -n hw.activecpu)
+CODE_SIGN_IDENTITY=${AMFITRUSTED_IDENTITY:--}
+#DEBUG_LEVEL=slowdebug
+#DEBUG_LEVEL=fastdebug
+DEBUG_LEVEL=release
+
+if [[ -z "${BOOTSTRAP_JDK}" ]] ; then
+    if [[ -d /AppleInternal/Java/Home/13 ]] ; then
+        BOOTSTRAP_JDK=/AppleInternal/Java/Home/13
+    else
+        BOOTSTRAP_JDK=$(/usr/libexec/java_home)
+    fi
+fi
+
+# Exporting this such that /usr/bin/clang uses it implictly
+export SDKROOT=$(xcrun --sdk ${SDK_NAME} --show-sdk-path)
+export PATH=/AppleInternal/Java/bin:$PATH
+
+JDK_VERSION=14.0.2
+
+do_jnf() {
+    mkdir -p build/Frameworks
+    xcodebuild install -project apple/JavaNativeFoundation/JavaNativeFoundation.xcodeproj -target JavaNativeFoundation -configuration Release DSTROOT="$(pwd)/build/Frameworks" CODE_SIGN_IDENTITY="${CODE_SIGN_IDENTITY}"
+}
+
+do_configure() {
+    VARIANTS=$1
+    DEBUG_LEVEL=$2
+    TARGET=$3
+    sh configure --with-debug-level=${DEBUG_LEVEL} \
+                 --openjdk-target=${TARGET} \
+                 --with-jvm-variants="${VARIANTS}" \
+                 --with-toolchain-type=clang \
+                 --disable-hotspot-gtest \
+                 --disable-javac-server \
+                 --disable-full-docs \
+                 --disable-manpages \
+                 --with-vendor-name="Apple Developer Technologies" \
+                 --with-macosx-bundle-id-base=com.apple.dt.java \
+                 --with-version-opt="" \
+                 --with-sdk-name=${SDK_NAME} \
+                 --with-macosx-codesign-identity="${CODE_SIGN_IDENTITY}" \
+                 --with-boot-jdk="${BOOTSTRAP_JDK}" \
+                 --with-libffi-lib="${SDKROOT}/usr/lib" \
+                 --with-libffi-include="${SDKROOT}/usr/include/ffi" \
+                 --disable-warnings-as-errors \
+                 --with-extra-cflags="-F$(pwd)/build/Frameworks" \
+                 --with-extra-cxxflags="-F$(pwd)/build/Frameworks" \
+                 --with-extra-ldflags="-F$(pwd)/build/Frameworks" \
+                 BUILD_CC=/usr/bin/clang \
+                 BUILD_CXX=/usr/bin/clang++ \
+                 "${@}"
+}
+
+do_build() {
+    VARIANTS=$1
+    DEBUG_LEVEL=$2
+    ARCH=$3
+    make JOBS=${CONCURRENCY} CONF=macosx-${ARCH}-${VARIANTS//,/AND}-${DEBUG_LEVEL} LOG=debug images
+    ditto build/Frameworks $(pwd)/build/macosx-${ARCH}-${VARIANTS//,/AND}-${DEBUG_LEVEL}/images/jdk-bundle/jdk-${JDK_VERSION}.jdk/Contents/Home/Frameworks
+}
+
+set -x
+
+do_jnf
+
+export DYLD_FALLBACK_FRAMEWORK_PATH=$(pwd)/build/Frameworks
+
+do_configure "server" ${DEBUG_LEVEL} x86_64-apple-darwin18.0.0
+do_build "server" ${DEBUG_LEVEL} x86_64
+
+do_configure "zero" ${DEBUG_LEVEL} aarch64-apple-darwin20.0.0 --with-build-jdk="$(pwd)/build/macosx-x86_64-server-${DEBUG_LEVEL}/images/jdk-bundle/jdk-${JDK_VERSION}.jdk/Contents/Home"
+do_build "zero" ${DEBUG_LEVEL} aarch64
+
+UNIVERSAL_JDK=$(pwd)/build/jdk-${JDK_VERSION}-universal-zero-${DEBUG_LEVEL}.jdk
+ARM64_JDK=$(pwd)/build/macosx-aarch64-zero-${DEBUG_LEVEL}/images/jdk-bundle/jdk-${JDK_VERSION}.jdk
+X86_64_JDK=$(pwd)/build/macosx-x86_64-server-${DEBUG_LEVEL}/images/jdk-bundle/jdk-${JDK_VERSION}.jdk
+
+rm -rf ${UNIVERSAL_JDK}
+
+# We ditto both in case there is something present in one but not both.
+ditto ${ARM64_JDK} ${UNIVERSAL_JDK}
+ditto ${X86_64_JDK} ${UNIVERSAL_JDK}
+
+for subdir in MacOS Home/bin Home/lib ; do
+    pushd ${UNIVERSAL_JDK}/Contents/${subdir}
+
+    find . -type f | while read file ; do
+        FILE_TYPE=$(file "${file}")
+        [[ ${FILE_TYPE} =~ "Mach-O" ]] || continue
+
+        if [[ -f "${ARM64_JDK}/Contents/${subdir}/${file}" && -f "${X86_64_JDK}/Contents/${subdir}/${file}" ]] ; then
+            lipo -output ${file} -create ${ARM64_JDK}/Contents/${subdir}/${file} ${X86_64_JDK}/Contents/${subdir}/${file}
+        fi
+    done
+done
+
+sed -i '' 's:x86_64:x86_64+arm64:' ${UNIVERSAL_JDK}/Contents/Home/release