[MIPS] Fix missing definitions for MIPS arch in build and driver scripts

pnacl/driver/driver_env.py

 #!/usr/bin/python
 # Copyright (c) 2012 The Native Client Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 #
 # IMPORTANT NOTE: If you make local mods to this file, you must run:
 #   %  pnacl/build.sh driver
 # in order for them to take effect in the scons build.  This command
 # updates the copy in the toolchain/ tree.
 
@@ skipping 36 matching lines @@
   'BASE_USR_ARCH'   : '${BASE_USR_%ARCH%}',
   'BASE_USR_ARM'   : '${BASE_LIBMODE}/usr-bc-arm',
   'BASE_LIB_ARCH'   : '${BASE_LIB_%ARCH%}',
   'BASE_LIB_ARM'   : '${BASE_LIBMODE}/lib-bc-arm',
 
   'BASE_LLVM_BIN'   : '${BASE_LLVM}/bin',
   'TRANSLATOR_BIN'  :
     '${BASE_TOOLCHAIN}/pnacl_translator/${STANDARD_ARCH}/bin',
 
   # TODO(pdox): Unify this with ARCH.
-  'STANDARD_ARCH'      : '${STANDARD_ARCH_%ARCH%}',
-  'STANDARD_ARCH_X8632': 'i686',
-  'STANDARD_ARCH_X8664': 'x86_64',
-  'STANDARD_ARCH_ARM'  : 'armv7',
+  'STANDARD_ARCH'       : '${STANDARD_ARCH_%ARCH%}',
+  'STANDARD_ARCH_X8632' : 'i686',
+  'STANDARD_ARCH_X8664' : 'x86_64',
+  'STANDARD_ARCH_ARM'   : 'armv7',
+  'STANDARD_ARCH_MIPS32': 'mips32',
 
   'SCONS_OUT'       : '${BASE_NACL}/scons-out',
 
   # Driver settings
   'ARCH'        : '',     # Target architecture
-  'BIAS'        : 'NONE', # This can be 'NONE', 'ARM', 'X8632', or 'X8664'.
+  'BIAS'        : 'NONE', # This can be 'NONE', 'ARM', 'MIPS32', 'X8632' or
+                          # 'X8664'.
                           # When not set to none, this causes the front-end to
                           # act like a target-specific compiler. This bias is
                           # currently needed while compiling newlib,
                           # and some scons tests.
   'DRY_RUN'     : '0',
   'DEBUG'       : '0',    # Print out internal actions
   'RECURSE'     : '0',    # In a recursive driver call
   'SAVE_TEMPS'  : '0',    # Do not clean up temporary files
   'SANDBOXED'   : '0',    # Use sandboxed toolchain for this arch. (main switch)
   'HAS_FRONTEND': '',     # Set by ReadConfig().  '1' if the driver install
@@ skipping 44 matching lines @@
   'SCONS_OS_darwin'     : 'mac',
   'SCONS_OS_windows'    : 'win',
 
   # llvm goldplugin
   'GOLD_PLUGIN_SO'  : '${BASE_LLVM}/${SO_DIR}/${SO_PREFIX}LLVMgold${SO_EXT}',
 
   'SCONS_STAGING'       : '${SCONS_STAGING_%ARCH%}',
   'SCONS_STAGING_X8632' : '${SCONS_OUT}/opt-${SCONS_OS}-x86-32/staging',
   'SCONS_STAGING_X8664' : '${SCONS_OUT}/opt-${SCONS_OS}-x86-64/staging',
   'SCONS_STAGING_ARM'   : '${SCONS_OUT}/opt-${SCONS_OS}-arm/staging',
+  'SCONS_STAGING_MIPS32': '${SCONS_OUT}/opt-${SCONS_OS}-mips32/staging',
 
   'SEL_UNIVERSAL_PREFIX': '${USE_EMULATOR ? ${EMULATOR}}',
   'SEL_UNIVERSAL'       : '${SCONS_STAGING}/sel_universal${EXEC_EXT}',
   # NOTE: -Q skips sel_ldr qualification tests, -c -c skips validation
   # NOTE: We are not using -B to load the IRT, since the translators do not
   # use the IRT.
   'SEL_UNIVERSAL_FLAGS' : '--abort_on_error ' +
                           '--uses_reverse_service ' +
                           '${USE_EMULATOR ? -Q -c -c --command_prefix ${EMULATOR}}',
 
   'EMULATOR'            : '${EMULATOR_%ARCH%}',
   'EMULATOR_X8632'      : '',
   'EMULATOR_X8664'      : '',
   # NOTE: this is currently the only dependency on the arm trusted TC
   'EMULATOR_ARM'        :
       '${BASE_NACL}/toolchain/linux_arm-trusted/run_under_qemu_arm',
+  'EMULATOR_MIPS32'     :
+      '${BASE_NACL}/toolchain/linux_mips-trusted/run_under_qemu_mips32',
 
   'SEL_LDR'       : '${SCONS_STAGING}/sel_ldr${EXEC_EXT}',
   'BOOTSTRAP_LDR' : '${SCONS_STAGING}/nacl_helper_bootstrap${EXEC_EXT}',
 
   # sandboxed llvm backend
   'LLC_SB'      : '${TRANSLATOR_BIN}/llc.nexe',
   # sandboxed linker (gold based)
   'LD_SB'       : '${TRANSLATOR_BIN}/ld.nexe',
 
   # Bitcode LLVM tools
@@ skipping 352 matching lines @@
 
 
 env = Environment()
 
 def override_env(meth_name, func):
   """Override a method in the global |env|, given the method name
   and the new function.
   """
   global env
   setattr(env, meth_name, types.MethodType(func, env, Environment))