[MIPS] Support for MIPS PNaCl in PPAPI

ppapi/native_client/src/untrusted/pnacl_support_extension/pnacl_component_crx_gen.py

Index: ppapi/native_client/src/untrusted/pnacl_support_extension/pnacl_component_crx_gen.py
diff --git a/ppapi/native_client/src/untrusted/pnacl_support_extension/pnacl_component_crx_gen.py b/ppapi/native_client/src/untrusted/pnacl_support_extension/pnacl_component_crx_gen.py
index 3d35b3f8fbdfedaec21585f80e1c716db66bd3a1..e3d7e542d557e4bb820b348cafddbe496e8db715 100755
--- a/ppapi/native_client/src/untrusted/pnacl_support_extension/pnacl_component_crx_gen.py
+++ b/ppapi/native_client/src/untrusted/pnacl_support_extension/pnacl_component_crx_gen.py
@@ -38,6 +38,8 @@ def CanonicalArch(arch):
   # TODO(jvoung): be more specific about the arm architecture version?
   if arch in ('arm', 'armv7'):
     return 'arm'
+  if arch in ('mips', 'mipsel'):
+    return 'mips'

[jvoung (off chromium), 2014/02/06 00:39:56]

can you just make the canonical arch "mips32" put that in ARCHES=[...], then
will that fix the bit in the LibDir()?

[petarj, 2014/02/20 00:23:18]

Done.

   if re.match('^i.86$', arch) or arch in ('x86_32', 'x86-32', 'ia32', 'x86'):
     return 'x86-32'
   return None
@@ -47,7 +49,7 @@ def GetBuildArch():
   return CanonicalArch(arch)
 
 BUILD_ARCH = GetBuildArch()
-ARCHES = ['x86-32', 'x86-64', 'arm']
+ARCHES = ['x86-32', 'x86-64', 'arm', 'mips']
 
 def IsValidArch(arch):
   return arch in ARCHES
@@ -56,7 +58,8 @@ def IsValidArch(arch):
 def StandardArch(arch):
   return {'x86-32': 'i686',
           'x86-64': 'x86_64',
-          'arm'   : 'armv7'}[arch]
+          'arm'   : 'armv7',
+          'mips'  : 'mips'}[arch]
 
 
 ######################################################################
@@ -186,6 +189,9 @@ class PnaclDirs(object):
 
   @staticmethod
   def LibDir(target_arch):
+    # Libraries for MIPS are located in lib-mips32 directory.
+    if (target_arch == "mips"):
+      return J(PnaclDirs.TranslatorRoot(), 'lib-mips32')

[dmichael (off chromium), 2014/02/05 23:55:22]

I'm not very familiar with this code, but...  why can't the name of the
directory be made to match so you don't need this special case?

[petarj, 2014/02/06 00:38:48]

PNaCl uses mips32 to refer to 32bit MIPS LE. This is how the libraries end up in
lib-mips32.
We need a special case somewhere, having it here seemed least intrusive to the
current setup.

     return J(PnaclDirs.TranslatorRoot(), 'lib-%s' % target_arch)
 
   @staticmethod