Enables cross-compilation of the VM for ARM.

tools/build.py

Index: tools/build.py
===================================================================
--- tools/build.py	(revision 20732)
+++ tools/build.py	(working copy)
@@ -14,7 +14,7 @@
 
 HOST_OS = utils.GuessOS()
 HOST_CPUS = utils.GuessCpus()
-armcompilerlocation = '/opt/codesourcery/arm-2009q1'
+armcompilerlocation = '/usr/local/google/home/zra/armcc'
 SCRIPT_DIR = os.path.dirname(sys.argv[0])
 DART_ROOT = os.path.realpath(os.path.join(SCRIPT_DIR, '..'))
 THIRD_PARTY_ROOT = os.path.join(DART_ROOT, 'third_party')
@@ -109,11 +109,11 @@
     toolchainprefix = armcompilerlocation + "/bin/arm-none-linux-gnueabi"

[ricow1, 2013/04/09 09:23:06]

I suggest changing armcompilerlocation to  DEFAULT_ARM_CROSS_COMPILER_PATH at
the top of this file and changing it back to the gnu compiler (again, sorry for
confusion).
Additionally, I would add a comment above saying:
To make sure that you have arm cross compilation tools installed run:
wget http://src.chromium.org/chrome/trunk/src/build/install-build-deps.sh
./install-build-deps.sh --arm
(also add this to wiki)

[zra, 2013/04/10 19:04:49]

Done. I also updated the "Preparing Your Machine" section of the wiki to mention
the --arm flag to install-build-deps.sh.

[ricow1, 2013/04/15 11:39:44]

Alternatively, and even better, could we show an error if you try and the cross
compiler is not there (specifying how to get them installed as stated above?

[zra, 2013/04/15 17:52:58]

Done.

   if toolchainprefix:
     toolsOverride = {
-      "CC"  :  toolchainprefix + "-gcc",
-      "CXX" :  toolchainprefix + "-g++",
-      "AR"  :  toolchainprefix + "-ar",
-      "LINK":  toolchainprefix + "-g++",
-      "NM"  :  toolchainprefix + "-nm",
+      "CC.target"  :  toolchainprefix + "-gcc",
+      "CXX.target" :  toolchainprefix + "-g++",
+      "AR.target"  :  toolchainprefix + "-ar",
+      "LINK.target":  toolchainprefix + "-g++",
+      "NM.target"  :  toolchainprefix + "-nm",
     }
   return toolsOverride