Enables cross-compilation of the VM for ARM.

tools/build.py

Index: tools/build.py
===================================================================
--- tools/build.py	(revision 21221)
+++ tools/build.py	(working copy)
@@ -15,11 +15,15 @@
 
 HOST_OS = utils.GuessOS()
 HOST_CPUS = utils.GuessCpus()
-armcompilerlocation = '/opt/codesourcery/arm-2009q1'
 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')
 
+# 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

[kustermann, 2013/04/15 11:59:22]

This doesn't quite work (at least on my machine). Replace it by:
$ svn co http://src.chromium.org/chrome/trunk/src/build
$ cd build; ./install-build-deps.sh --arm

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

Was the problem that './linux/install-chromeos-fonts.py' isn't found? Passing
--no-chromeos-fonts fixes that, but I've also included the svn command to get
all the chrome build files, just in case. I've updated the instructions here and
on the wiki. I also updated both places to suggest doing a chmod u+x of the
script instead of sourcing it, so that when the script calls exit it doesn't
close the terminal.

+DEFAULT_ARM_CROSS_COMPILER_PATH = '/usr'
+
 def BuildOptions():
   result = optparse.OptionParser()
   result.add_option("-m", "--mode",
@@ -107,14 +111,14 @@
 def SetTools(arch, toolchainprefix):
   toolsOverride = None
   if arch == 'arm' and toolchainprefix == None:
-    toolchainprefix = armcompilerlocation + "/bin/arm-none-linux-gnueabi"
+    toolchainprefix = DEFAULT_ARM_CROSS_COMPILER_PATH + "/bin/arm-linux-gnueabi"
   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