[sam] Added automatic toolchain download on build.xml (linux only)

build/build.xml

@@ -146,7 +146,24 @@
 	  message="Fix revision number in Base.java" />
   </target>
   
-  
+  <!-- - - - - - - - - - - - - - - - - - - -->
+  <!-- Download of toolchains for ARM      -->
+  <!-- - - - - - - - - - - - - - - - - - - -->
+
+  <target name="get-arm-toolchain" description="Download and unpack toolchain for ARM">
+    <antcall target="${platform}-get-arm-toolchain" />
+  </target>
+
+  <target name="get-arm-toolchain-help" if="arm_not_available">
+    <echo>
+      =========================================================
+      To download and install ARM-gcc toolchain use the command
+      
+      ant get-arm-toolchain
+      =========================================================
+    </echo>
+  </target>
+
   <!-- - - - - - - - -->
   <!-- Mac OS X      -->
   <!-- - - - - - - - -->
@@ -344,7 +361,7 @@
     <fail message="wrong platform (${os.name})" />
   </target>
   
-  <target name="linux-build" depends="revision-check, linux-checkos, subprojects-build" description="Build linux version">
+  <target name="linux-build" depends="revision-check, linux-checkos, subprojects-build, linux-check-arm-toolchain" description="Build linux version">
     <mkdir dir="linux/work" />
     
     <copy todir="linux/work">
@@ -372,8 +389,7 @@
     <chmod perm="755" file="linux/work/hardware/tools/bossac" />
     <chmod perm="755" file="linux/work/hardware/tools/bossac64" />
 
-    <copy todir="linux/work" file="linux/dist/arduino" />
+    <antcall target="get-arm-toolchain-help" />
-    <chmod perm="755" file="linux/work/arduino" />
   </target>
 
   <target name="linux64-build" depends="linux-build" description="Build linux (64-bit) version">
@@ -391,6 +407,45 @@
     <exec executable="./linux/work/arduino" spawn="false"/>
   </target>
 
+  <target name="linux-check-arm-toolchain">
+    <available file="linux/work/hardware/tools/g++_arm_none_eabi" property="arm_available" />
+    <condition property="arm_not_available">
+      <not>
+        <isset property="arm_available" />
+      </not>
+    </condition>
+  </target>
+
+  <target name="linux-get-arm-toolchain" depends="linux-check-arm-toolchain" if="arm_not_available">
+    <!-- Retrieve ARM toolchain... -->
+    <get 
+      src="http://static.leaflabs.com/pub/codesourcery/gcc-arm-none-eabi-latest-linux32.tar.gz"
+      dest="linux/dist/gcc-arm-none-eabi-latest-linux32.tar.gz"
+      skipexisting="true" verbose="true" />
+    <checksum file="linux/dist/gcc-arm-none-eabi-latest-linux32.tar.gz" algorithm="sha" 
+      fileext=".sha" verifyproperty="checksum.matches"/>
+    <condition property="checksum.matches.fail">
+      <equals arg1="${checksum.matches}" arg2="false"/>
+    </condition>
+    <fail if="checksum.matches.fail">
+      File gcc-arm-none-eabi-latest-linux32.tar.gz failed checksum. 
+      Please remove "linux/dist/gcc-arm-none-eabi-latest-linux32.tar.gz" to download again.
+    </fail>
+
+    <!-- ...and unzip on the destination folder -->
+    <exec executable="tar" output="/dev/null" os="Linux">
+      <arg value="xfz"/>
+      <arg value="linux/dist/gcc-arm-none-eabi-latest-linux32.tar.gz"/>
+      <arg value="--directory=linux/work/hardware/tools"/>
+    </exec>
+
+    <move file="linux/work/hardware/tools/arm" 
+      tofile="linux/work/hardware/tools/g++_arm_none_eabi" />
+
+    <copy todir="linux/work" file="linux/dist/arduino" />
+    <chmod perm="755" file="linux/work/arduino" />
+  </target>
+
   <target name="linux-dist" depends="build" 
 	  description="Build .tar.gz of linux version">
 

build/linux/dist/gcc-arm-none-eabi-latest-linux32.tar.gz.sha

@@ -0,0 +1 @@
+d835b43b066ccb224e2767a26e2ca90abcebe06b