The key insight is that TWS is fundamentally a Java application with platform-agnostic JAR files. While the TWS installer is x86-only and won't run on ARM64, the compiled Java bytecode will run perfectly on any ARM64 Java Virtual Machine. The strategy is:

- Install TWS on an x86-64 machine and extract the JAR files

- Install native ARM64 Java on your Gentoo Asahi system

- Copy the JAR files and launch TWS using the native JVM



sudo emerge -av dev-java/openjdk-bin:17
java -version
eselect java-vm list

tar -czf Jts.tar.gz Jts/

scp username@x86machine:~/Jts.tar.gz ~/.local/

tar -xzf Jts.tar.gz
ls -la ~/.local/Jts/

# create launch script

vim .local/bin/ib-tws

## 1
#!/bin/bash
set -euo pipefail

# TWS Launch Script for ARM64 Native Java

JTS_DIR="${HOME}/Jts"
cd "${JTS_DIR}" || { echo "Directory $JTS_DIR does not exist!"; exit 1; }

JTS_DIR="${HOME}/.local/Jts/1041/jars"
CLASSPATH=$(printf ":%s" "${JTS_DIR}"/*.jar)
CLASSPATH=${CLASSPATH:1}

export HOME="$HOME"          # For possible relative lookups
JTS_DIR="$HOME/.local/Jts"
cd "$JTS_DIR"

# List of required JARs (adjust as needed for your version)
JARS=(
    jts.jar
    total.jar
    hsqldb.jar
    jcommon-1.0.16.jar
    jfreechart-1.0.13.jar
    jhall.jar
    other.jar
    rss.jar
    pluginsupport.jar
)

CLASSPATH=$(IFS=:; echo "${JARS[*]}")

# Check that all JARs exist
for JAR in "${JARS[@]}"; do
    if [[ ! -f "$JAR" ]]; then
        echo "Missing JAR file: $JAR"
        exit 1
    fi
done

echo "Launching TWS..."
#Use : as the classpath separator on Linux (Windows uses ;)
exec java \
  -cp "${CLASSPATH}" \
  -Dsun.java2d.noddraw=true \
  -Dsun.java2d.xrender=false \
  -Dswing.boldMetal=false \
  -Dsun.locale.formatasdefault=true \
  -Xmx1024M \
  -XX:MaxPermSize=256M \
  jclient.LoginFrame .


### The exact JAR filenames (especially total.jar, jcommon-*.jar, jfreechart-*.jar) vary by TWS version - ls ~/Jts/*.jar

# export GDK_BACKEND=x11 probably needed in script

chmod +x

## Dependencies

# On Gentoo, ensure basic fonts are installed
sudo emerge -av media-fonts/dejavu media-fonts/liberation-fonts
# Rebuild font cache
fc-cache -fv


The default -Xmx1024M allocates 1GB heap. Adjust based on your needs and M2's 8GB total RAM:
# For more intensive use
-Xmx2048M -XX:MaxPermSize=512M