Fix for building ARM/linux using clang.

src/trusted/service_runtime/linux/nacl_bootstrap.gyp

Index: src/trusted/service_runtime/linux/nacl_bootstrap.gyp
diff --git a/src/trusted/service_runtime/linux/nacl_bootstrap.gyp b/src/trusted/service_runtime/linux/nacl_bootstrap.gyp
index 17ba84e843efd7c238c271ce10513f8da7d8bbd8..6ce2f8dbf44d020a0efcd1711f786f0763fb9173 100644
--- a/src/trusted/service_runtime/linux/nacl_bootstrap.gyp
+++ b/src/trusted/service_runtime/linux/nacl_bootstrap.gyp
@@ -185,6 +185,11 @@
               'variables': {
                 'compiler': '<!(/bin/echo -n <(android_toolchain)/*-g++)',
               }
+            }],
+            ['OS!="android" and target_arch=="arm"', {
+              'variables': {
+                'compiler': '<!(echo ${CXX:=arm-linux-gnueabi-g++})',

[Mark Seaborn, 2014/07/23 19:13:41]

I don't understand this part of the change.  Can you explain?

[Sam Clegg, 2014/07/23 19:21:52]

This action needs access to the target linker.  I'm can't remember exactly why.

Previously we were setting $CXX when cross compiling.  Now we are using clang
with a "-target" argument, so CXX is not set.  What is more g++ (the default) or
clang where would both give the wrong result as they would default to host
builds.

I admit that this is pretty horrible.  Perhaps there is some
way we can avoid this action.  I will investigate.

+              }
             }, {
               'variables': {
                 'compiler': '<!(echo ${CXX:=g++})',