#1278 failed on Linux

Actually it seems like the code to prioritize the arduino provided
platforms never was added
Now I prioritize the latest arduino maintainer platform with
architectures sam samd and avr

Author: jantje

io.sloeber.core/src/io/sloeber/core/api/PackageManager.java

@@ -881,12 +881,38 @@ public static Map<String, String> getEnvironmentVariables() {
             return myWorkbenchEnvironmentVariables;
         }
         myWorkbenchEnvironmentVariables.clear();
+        ArduinoPlatform latestAvrPlatform=null;
+        ArduinoPlatform latestSamdPlatform=null;
+        ArduinoPlatform latestSamPlatform=null;
         for (ArduinoPlatform curPlatform : InternalPackageManager.getInstalledPlatforms()) {
             Package pkg = curPlatform.getParent();
             if (pkg != null) {
                 myWorkbenchEnvironmentVariables.putAll(Helpers.getEnvVarPlatformFileTools(curPlatform, false));
+                if(Const.ARDUINO.equalsIgnoreCase(pkg.getMaintainer())){
+                switch (curPlatform.getArchitecture()) {
+                case Const.AVR:
+                	latestAvrPlatform=curPlatform;
+                	break;
+                case Const.SAM:
+                	latestSamPlatform=curPlatform;
+                	break;
+                case Const.SAMD:
+                	latestSamdPlatform=curPlatform;
+                	break;
+                }            	
+                }
             }
         }
+
+        if( latestSamdPlatform!=null) {
+        	myWorkbenchEnvironmentVariables.putAll(Helpers.getEnvVarPlatformFileTools(latestSamdPlatform, false));
+        }
+        if( latestSamPlatform!=null) {
+        	myWorkbenchEnvironmentVariables.putAll(Helpers.getEnvVarPlatformFileTools(latestSamPlatform, false));
+        }
+        if( latestAvrPlatform!=null) {
+        	myWorkbenchEnvironmentVariables.putAll(Helpers.getEnvVarPlatformFileTools(latestAvrPlatform, false));
+        }
         platformsDirty = false;
         return myWorkbenchEnvironmentVariables;
     }

io.sloeber.core/src/io/sloeber/core/common/Const.java

@@ -110,6 +110,10 @@ public class Const {
 
 	public static final String SLOEBER_OBJCOPY = ENV_KEY_SLOEBER_START + "objcopy";
 
+	public static final String AVR = "avr";
+	public static final String SAM = "sam";
+	public static final String SAMD = "samd";
+
 
 
 

io.sloeber.core/src/io/sloeber/core/txt/TxtFile.java

@@ -156,7 +156,7 @@ public String getArchitecture() {
         IPath platformFile = new Path(this.mLoadedTxtFile.toString().trim());
         String architecture = platformFile.removeLastSegments(1).lastSegment();
         if (architecture == null) {// for error conditions
-            architecture = "avr"; //$NON-NLS-1$
+            architecture = Const.AVR; 
         }
         if (architecture.contains(Const.DOT)) { // This is a version number so
             // package