Feature: Use LTS cross-compiler for Linux armv6/armv7 to use glibc 2.28 (#440)

* Feature: Use LTS cross-compiler for Linux armv6/armv7 to use glibc 2.28

* Use softfp for armv7

* Fix armv6 config

* Update native libraries

---------

Co-authored-by: github-actions <41898282+github-actions[bot]@users.noreply.github.com>

.gitignore

@@ -17,6 +17,7 @@ lib_managed/
 src_managed/
 project/boot/
 project/plugins/project/
+.bsp
 
 # Scala-IDE specific
 .scala_dependencies

Makefile

@@ -196,10 +196,10 @@ linux-arm: jni-header
 	./docker/dockcross-armv5 -a $(DOCKER_RUN_OPTS) bash -c 'make clean-native native CROSS_PREFIX=/usr/xcc/armv5-unknown-linux-gnueabi/bin//armv5-unknown-linux-gnueabi- OS_NAME=Linux OS_ARCH=arm'
 
 linux-armv6: jni-header
-	./docker/dockcross-armv6 -a $(DOCKER_RUN_OPTS) bash -c 'make clean-native native CROSS_PREFIX=armv6-unknown-linux-gnueabihf- OS_NAME=Linux OS_ARCH=armv6'
+	./docker/dockcross-armv6 -a $(DOCKER_RUN_OPTS) bash -c 'make clean-native native OS_NAME=Linux OS_ARCH=armv6'
 
 linux-armv7: jni-header
-	./docker/dockcross-armv7 -a $(DOCKER_RUN_OPTS) bash -c 'make clean-native native CROSS_PREFIX=/usr/xcc/armv7-unknown-linux-gnueabi/bin/armv7-unknown-linux-gnueabi- OS_NAME=Linux OS_ARCH=armv7'
+	./docker/dockcross-armv7 -a $(DOCKER_RUN_OPTS) bash -c 'make clean-native native OS_NAME=Linux OS_ARCH=armv7'
 
 linux-android-arm: jni-header
 	./docker/dockcross-android-arm -a $(DOCKER_RUN_OPTS) bash -c 'make clean-native native CROSS_PREFIX=/usr/arm-linux-androideabi/bin/arm-linux-androideabi- OS_NAME=Linux OS_ARCH=android-arm'

Makefile.common

@@ -213,16 +213,16 @@ Linux-arm_LINKFLAGS := -shared -static-libgcc
 Linux-arm_LIBNAME   := libsnappyjava.so
 Linux-arm_SNAPPY_FLAGS:=
 
-Linux-armv6_CXX       := $(CROSS_PREFIX)g++
-Linux-armv6_STRIP     := $(CROSS_PREFIX)strip
+Linux-armv6_CXX       := ${CROSS_ROOT}/bin/${CROSS_TRIPLE}-g++
+Linux-armv6_STRIP     := ${CROSS_ROOT}/bin/${CROSS_TRIPLE}-strip
 Linux-armv6_CXXFLAGS  := -Ilib/inc_linux -I$(JAVA_HOME)/include -O2 -fPIC -fvisibility=hidden -mfloat-abi=hard -std=c++11
 Linux-armv6_LINKFLAGS := -shared -static-libgcc -std=c++11
 Linux-armv6_LIBNAME   := libsnappyjava.so
 Linux-armv6_SNAPPY_FLAGS:=
 
-Linux-armv7_CXX       := $(CROSS_PREFIX)g++
-Linux-armv7_STRIP     := $(CROSS_PREFIX)strip
-Linux-armv7_CXXFLAGS  := -Ilib/inc_linux -I$(JAVA_HOME)/include -O2 -fPIC -fvisibility=hidden -mfloat-abi=hard -std=c++11
+Linux-armv7_CXX       := ${CROSS_ROOT}/bin/${CROSS_TRIPLE}-g++
+Linux-armv7_STRIP     := ${CROSS_ROOT}/bin/${CROSS_TRIPLE}-strip
+Linux-armv7_CXXFLAGS  := -Ilib/inc_linux -I$(JAVA_HOME)/include -O2 -fPIC -fvisibility=hidden -mfloat-abi=softfp -std=c++11
 Linux-armv7_LINKFLAGS := -shared -static-libgcc
 Linux-armv7_LIBNAME   := libsnappyjava.so
 Linux-armv7_SNAPPY_FLAGS:=

docker/dockcross-armv6

@@ -1,6 +1,6 @@
 #!/bin/bash
 
-DEFAULT_DOCKCROSS_IMAGE=dockcross/linux-armv6
+DEFAULT_DOCKCROSS_IMAGE=dockcross/linux-armv6-lts
 
 #------------------------------------------------------------------------------
 # Helpers

docker/dockcross-armv7

@@ -1,16 +1,16 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
-DEFAULT_DOCKCROSS_IMAGE=dockcross/linux-armv7
+DEFAULT_DOCKCROSS_IMAGE=dockcross/linux-armv7-lts:20230421-a0eaff4
 
 #------------------------------------------------------------------------------
 # Helpers
 #
 err() {
-    echo -e >&2 ERROR: $@\\n
+    echo -e >&2 "ERROR: $*\n"
 }
 
 die() {
-    err $@
+    err "$*"
     exit 1
 }
 
@@ -22,28 +22,39 @@ has() {
     type -t $kind:$name | grep -q function
 }
 
+# If OCI_EXE is not already set, search for a container executor (OCI stands for "Open Container Initiative")
+if [ -z "$OCI_EXE" ]; then
+    if which podman >/dev/null 2>/dev/null; then
+        OCI_EXE=podman
+    elif which docker >/dev/null 2>/dev/null; then
+        OCI_EXE=docker
+    else
+        die "Cannot find a container executor. Search for docker and podman."
+    fi
+fi
+
 #------------------------------------------------------------------------------
 # Command handlers
 #
 command:update-image() {
-    docker pull $FINAL_IMAGE
+    $OCI_EXE pull $FINAL_IMAGE
 }
 
 help:update-image() {
-    echo Pull the latest $FINAL_IMAGE .
+    echo "Pull the latest $FINAL_IMAGE ."
 }
 
 command:update-script() {
-    if cmp -s <( docker run $FINAL_IMAGE ) $0; then
-        echo $0 is up to date
+    if cmp -s <( $OCI_EXE run --rm $FINAL_IMAGE ) $0; then
+        echo "$0 is up to date"
     else
-        echo -n Updating $0 '... '
-        docker run $FINAL_IMAGE > $0 && echo ok
+        echo -n "Updating $0 ... "
+        $OCI_EXE run --rm $FINAL_IMAGE > $0 && echo ok
     fi
 }
 
-help:update-image() {
-    echo Update $0 from $FINAL_IMAGE .
+help:update-script() {
+    echo "Update $0 from $FINAL_IMAGE ."
 }
 
 command:update() {
@@ -52,7 +63,7 @@ command:update() {
 }
 
 help:update() {
-    echo Pull the latest $FINAL_IMAGE, and then update $0 from that.
+    echo "Pull the latest $FINAL_IMAGE, and then update $0 from that."
 }
 
 command:help() {
@@ -98,6 +109,7 @@ while [[ $# != 0 ]]; do
     case $1 in
 
         --)
+            shift
             break
             ;;
 
@@ -171,29 +183,95 @@ fi
 # Set the docker run extra args (if any)
 FINAL_ARGS=${ARG_ARGS-${DOCKCROSS_ARGS}}
 
-# If we are not running via boot2docker
-if [ -z $DOCKER_HOST ]; then
-    USER_IDS="-e BUILDER_UID=$( id -u ) -e BUILDER_GID=$( id -g ) -e BUILDER_USER=$( id -un ) -e BUILDER_GROUP=$( id -gn )"
+# Bash on Ubuntu on Windows
+UBUNTU_ON_WINDOWS=$([ -e /proc/version ] && grep -l Microsoft /proc/version || echo "")
+# MSYS, Git Bash, etc.
+MSYS=$([ -e /proc/version ] && grep -l MINGW /proc/version || echo "")
+# CYGWIN
+CYGWIN=$([ -e /proc/version ] && grep -l CYGWIN /proc/version || echo "")
+
+if [ -z "$UBUNTU_ON_WINDOWS" -a -z "$MSYS" -a "$OCI_EXE" != "podman" ]; then
+    USER_IDS=(-e BUILDER_UID="$( id -u )" -e BUILDER_GID="$( id -g )" -e BUILDER_USER="$( id -un )" -e BUILDER_GROUP="$( id -gn )")
+fi
+
+# Change the PWD when working in Docker on Windows
+if [ -n "$UBUNTU_ON_WINDOWS" ]; then
+    WSL_ROOT="/mnt/"
+    CFG_FILE=/etc/wsl.conf
+	if [ -f "$CFG_FILE" ]; then
+		CFG_CONTENT=$(cat $CFG_FILE | sed -r '/[^=]+=[^=]+/!d' | sed -r 's/\s+=\s/=/g')
+		eval "$CFG_CONTENT"
+		if [ -n "$root" ]; then
+			WSL_ROOT=$root
+		fi
+	fi
+    HOST_PWD=`pwd -P`
+    HOST_PWD=${HOST_PWD/$WSL_ROOT//}
+elif [ -n "$MSYS" ]; then
+    HOST_PWD=$PWD
+    HOST_PWD=${HOST_PWD/\//}
+    HOST_PWD=${HOST_PWD/\//:\/}
+elif [ -n "$CYGWIN" ]; then
+    for f in pwd readlink cygpath ; do
+        test -n "$(type "${f}" )" || { echo >&2 "Missing functionality (${f}) (in cygwin)." ; exit 1 ; } ;
+    done ;
+    HOST_PWD="$( cygpath -w "$( readlink -f "$( pwd ;)" ; )" ; )" ;
+else
+    HOST_PWD=$PWD
+    [ -L $HOST_PWD ] && HOST_PWD=$(readlink $HOST_PWD)
+fi
+
+# Mount Additional Volumes
+if [ -z "$SSH_DIR" ]; then
+    SSH_DIR="$HOME/.ssh"
+fi
+
+HOST_VOLUMES=
+if [ -e "$SSH_DIR" -a -z "$MSYS" ]; then
+    if test -n "${CYGWIN}" ; then
+      HOST_VOLUMES+="-v $(cygpath -w ${SSH_DIR} ; ):/home/$(id -un)/.ssh" ;
+    else
+      HOST_VOLUMES+="-v $SSH_DIR:/home/$(id -un)/.ssh" ;
+    fi ;
 fi
 
 #------------------------------------------------------------------------------
 # Now, finally, run the command in a container
 #
-docker run --rm \
-    -v $PWD:/work \
-    $USER_IDS \
+TTY_ARGS=
+tty -s && [ -z "$MSYS" ] && TTY_ARGS=-ti
+CONTAINER_NAME=dockcross_$RANDOM
+$OCI_EXE run $TTY_ARGS --name $CONTAINER_NAME \
+    -v "$HOST_PWD":/work \
+    $HOST_VOLUMES \
+    "${USER_IDS[@]}" \
     $FINAL_ARGS \
     $FINAL_IMAGE "$@"
+run_exit_code=$?
+
+# Attempt to delete container
+rm_output=$($OCI_EXE rm -f $CONTAINER_NAME 2>&1)
+rm_exit_code=$?
+if [[ $rm_exit_code != 0 ]]; then
+  if [[ "$CIRCLECI" == "true" ]] && [[ $rm_output == *"Driver btrfs failed to remove"* ]]; then
+    : # Ignore error because of https://circleci.com/docs/docker-btrfs-error/
+  else
+    echo "$rm_output"
+    exit $rm_exit_code
+  fi
+fi
+
+exit $run_exit_code
 
 ################################################################################
 #
 # This image is not intended to be run manually.
 #
 # To create a dockcross helper script for the
-# dockcross/linux-armv7 image, run:
+# dockcross/linux-armv7-lts:20230421-a0eaff4 image, run:
 #
-# docker run --rm dockcross/linux-armv7 > dockcross-linux-armv7
-# chmod +x dockcross-linux-armv7
+# docker run --rm dockcross/linux-armv7-lts:20230421-a0eaff4 > dockcross-linux-armv7-lts-20230421-a0eaff4
+# chmod +x dockcross-linux-armv7-lts-20230421-a0eaff4
 #
 # You may then wish to move the dockcross script to your PATH.
 #