Add code to cross compile x64 jdk8 on arm64 mac (#3492)

* Add cross compile steps for x64 jdk8 on m1 macs

* syntax error

* syntax error

* resolve linter error

* add export

* make link to xcode11.7 using - instead of _

* Update build-farm/platform-specific-configurations/mac.sh

Co-authored-by: Stewart X Addison <[email protected]>

* Update build-farm/platform-specific-configurations/mac.sh

Co-authored-by: Stewart X Addison <[email protected]>

* debug

* wrong uname flag

* add MAC_ROSETTA_PREFIX to the echo command

* temp fix for xcode switch so I can run the tests with the build

* add /opt/homebrew/bin to beginning of PATH jdk8 mac build

* add /opt/homebrew/bin to beginning of PATH jdk8 mac build on arm machines

* remove debug

---------

Co-authored-by: Stewart X Addison <[email protected]>

Author: Haroon-Khel

.github/workflows/build.yml

@@ -135,6 +135,7 @@ jobs:
       run: |
         rm -rf /Applications/Xcode.app
         ln -s /Applications/Xcode_11.7.app /Applications/Xcode.app
+        ln -s /Applications/Xcode_11.7.app /Applications/Xcode-11.7.app
 
     - name: Build macOS
       run: |

build-farm/make-adopt-build-farm.sh

@@ -32,7 +32,7 @@ if [ -z "$ARCHITECTURE"  ]; then
    if [ "$ARCHITECTURE" = "powerpc" ]; then ARCHITECTURE=ppc64;      fi # AIX
    if [ "$ARCHITECTURE" = "arm"     ]; then ARCHITECTURE=aarch64;    fi # mac/aarch64
    if [ "$ARCHITECTURE" = "armv7l"  ]; then ARCHITECTURE=arm;        fi # Linux/arm32
-   echo ARCHITECTURE not defined - assuming $ARCHITECTURE
+   echo ARCHITECTURE not defined - assuming "$ARCHITECTURE"
    export ARCHITECTURE
 fi
 
@@ -132,6 +132,7 @@ CONFIGURE_ARGS_FOR_ANY_PLATFORM=""
 CONFIGURE_ARGS=${CONFIGURE_ARGS:-""}
 BUILD_ARGS=${BUILD_ARGS:-""}
 VARIANT_ARG=""
+MAC_ROSETTA_PREFIX=""
 
 if [ -z "${JDK_BOOT_VERSION}" ]
 then
@@ -238,11 +239,11 @@ if [ "${JAVA_FEATURE_VERSION}" -lt 16 ]; then
   export BUILD_ARGS="${BUILD_ARGS} --create-jre-image"
 fi
 
-echo "$PLATFORM_SCRIPT_DIR/../makejdk-any-platform.sh --clean-git-repo --jdk-boot-dir ${JDK_BOOT_DIR} --configure-args ${CONFIGURE_ARGS_FOR_ANY_PLATFORM} --target-file-name ${FILENAME} ${TAG_OPTION} ${OPTIONS} ${BUILD_ARGS} ${VARIANT_ARG} ${JAVA_TO_BUILD}"
+echo "$MAC_ROSETTA_PREFIX $PLATFORM_SCRIPT_DIR/../makejdk-any-platform.sh --clean-git-repo --jdk-boot-dir ${JDK_BOOT_DIR} --configure-args ${CONFIGURE_ARGS_FOR_ANY_PLATFORM} --target-file-name ${FILENAME} ${TAG_OPTION} ${OPTIONS} ${BUILD_ARGS} ${VARIANT_ARG} ${JAVA_TO_BUILD}"
 
 # Convert all speech marks in config args to make them safe to pass in.
 # These will be converted back into speech marks shortly before we use them, in build.sh.
 CONFIGURE_ARGS_FOR_ANY_PLATFORM="${CONFIGURE_ARGS_FOR_ANY_PLATFORM//\"/temporary_speech_mark_placeholder}"
 
 # shellcheck disable=SC2086
-bash -c "$PLATFORM_SCRIPT_DIR/../makejdk-any-platform.sh --clean-git-repo --jdk-boot-dir ${JDK_BOOT_DIR} --configure-args \"${CONFIGURE_ARGS_FOR_ANY_PLATFORM}\" --target-file-name ${FILENAME} ${TAG_OPTION} ${OPTIONS} ${BUILD_ARGS} ${VARIANT_ARG} ${JAVA_TO_BUILD}"
+bash -c "$MAC_ROSETTA_PREFIX $PLATFORM_SCRIPT_DIR/../makejdk-any-platform.sh --clean-git-repo --jdk-boot-dir ${JDK_BOOT_DIR} --configure-args \"${CONFIGURE_ARGS_FOR_ANY_PLATFORM}\" --target-file-name ${FILENAME} ${TAG_OPTION} ${OPTIONS} ${BUILD_ARGS} ${VARIANT_ARG} ${JAVA_TO_BUILD}"

build-farm/platform-specific-configurations/mac.sh

@@ -22,10 +22,19 @@ source "$SCRIPT_DIR/../../sbin/common/constants.sh"
 export MACOSX_DEPLOYMENT_TARGET=10.9
 export BUILD_ARGS="${BUILD_ARGS}"
 
+## JDK8 only: If, at this point in the build, the architecure of the machine is arm64 while the ARCHITECTURE variable
+## is x64 then we need to add the cross compilation option --openjdk-target=x86_64-apple-darwin
+MACHINEARCHITECTURE=$(uname -m)
+
 if [ "${JAVA_TO_BUILD}" == "${JDK8_VERSION}" ]
 then
-  XCODE_SWITCH_PATH="/Applications/Xcode.app"
+  XCODE_SWITCH_PATH="/Applications/Xcode-11.7.app"
   export CONFIGURE_ARGS_FOR_ANY_PLATFORM="${CONFIGURE_ARGS_FOR_ANY_PLATFORM} --with-toolchain-type=clang"
+  if [[ "${MACHINEARCHITECTURE}" == "arm64" ]] && [[ "${ARCHITECTURE}" == "x64" ]]; then
+    export CONFIGURE_ARGS_FOR_ANY_PLATFORM="${CONFIGURE_ARGS_FOR_ANY_PLATFORM} --openjdk-target=x86_64-apple-darwin"
+    export MAC_ROSETTA_PREFIX="arch -x86_64"
+    export PATH=/opt/homebrew/bin:/usr/local/bin:$PATH
+  fi
   if [ "${VARIANT}" == "${BUILD_VARIANT_OPENJ9}" ]; then
     export CONFIGURE_ARGS_FOR_ANY_PLATFORM="${CONFIGURE_ARGS_FOR_ANY_PLATFORM} --with-openssl=fetched --enable-openssl-bundling"
     export BUILD_ARGS="${BUILD_ARGS} --skip-freetype"