Signed-off-by: Martin Dummer <martin.dummer@gmx.net>

diff -Naur a/bin/signal-cli b/bin/signal-cli
--- a/bin/signal-cli
+++ b/bin/signal-cli
@@ -84,13 +84,20 @@


 # Determine the Java command to use to start the JVM.
-if [ -n "$JAVA_HOME" ] ; then
-    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
-        # IBM's JDK on AIX uses strange locations for the executables
-        JAVACMD="$JAVA_HOME/jre/sh/java"
-    else
-        JAVACMD="$JAVA_HOME/bin/java"
-    fi
+# This package needs Java 11, but Java 11 is currently not part of the gentoo eselect config system
+# so we must search for matching java binaries
+JAVA_DIRS="$JAVA_HOME /opt/openjdk-jre-bin-11 /opt/openjdk-bin-11"
+for I in $JAVA_DIRS ; do
+	J_TRY="$I/bin/java"
+	if [ -x "$J_TRY" ] ; then
+		"$J_TRY" -version 2>&1 | grep --fixed-strings --quiet "11."
+		if [ $? -eq 0 ] ; then
+        		JAVACMD="$J_TRY"
+			break
+		fi
+	fi
+done
+if [ -n "$JAVACMD" ] ; then
     if [ ! -x "$JAVACMD" ] ; then
         die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME