Re-establish mips basic infrastructure.

SConstruct

 # Copyright 2010 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 #       copyright notice, this list of conditions and the following
 #       disclaimer in the documentation and/or other materials provided
@@ skipping 203 matching lines @@
       'unalignedaccesses:off' : {
         'CPPDEFINES' : ['CAN_USE_UNALIGNED_ACCESSES=0']
       }
     },
     'simulator:arm': {
       'CCFLAGS':      ['-m32'],
       'LINKFLAGS':    ['-m32'],
     },
     'arch:mips': {
       'CPPDEFINES':   ['V8_TARGET_ARCH_MIPS'],
+      'mips_arch_variant:mips32r2': {
+        'CPPDEFINES':    ['_MIPS_ARCH_MIPS32R2']
+      },
       'simulator:none': {
-        'CCFLAGS':      ['-EL', '-mips32r2', '-Wa,-mips32r2', '-fno-inline'],
-        'LDFLAGS':      ['-EL']
+        'CCFLAGS':      ['-EL'],
+        'LINKFLAGS':    ['-EL'],
+        'mips_arch_variant:mips32r2': {
+          'CCFLAGS':      ['-mips32r2', '-Wa,-mips32r2']
+        },
+        'mips_arch_variant:mips32r1': {
+          'CCFLAGS':      ['-mips32', '-Wa,-mips32']
+        },
+        'library:static': {
+          'LINKFLAGS':    ['-static', '-static-libgcc']
+        },
+        'mipsabi:softfloat': {
+          'CCFLAGS':      ['-msoft-float'],
+          'LINKFLAGS':    ['-msoft-float']
+        },
+        'mipsabi:hardfloat': {
+          'CCFLAGS':      ['-mhard-float'],
+          'LINKFLAGS':    ['-mhard-float']
+        }
       }
     },
     'simulator:mips': {
       'CCFLAGS':      ['-m32'],
       'LINKFLAGS':    ['-m32'],
+      'mipsabi:softfloat': {
+        'CPPDEFINES':    ['__mips_soft_float=1'],
+      }
     },
     'arch:x64': {
       'CPPDEFINES':   ['V8_TARGET_ARCH_X64'],
       'CCFLAGS':      ['-m64'],
       'LINKFLAGS':    ['-m64'],
     },
     'gdbjit:on': {
       'CPPDEFINES':   ['ENABLE_GDB_JIT_INTERFACE']
     }
   },
@@ skipping 93 matching lines @@
       'LIBS': ['winmm', 'ws2_32']
     },
     'arch:arm': {
       'CPPDEFINES':   ['V8_TARGET_ARCH_ARM'],
       # /wd4996 is to silence the warning about sscanf
       # used by the arm simulator.
       'WARNINGFLAGS': ['/wd4996']
     },
     'arch:mips': {
       'CPPDEFINES':   ['V8_TARGET_ARCH_MIPS'],
+      'mips_arch_variant:mips32r2': {
+        'CPPDEFINES':    ['_MIPS_ARCH_MIPS32R2']
+      },
     },
     'disassembler:on': {
       'CPPDEFINES':   ['ENABLE_DISASSEMBLER']
     }
   }
 }
 
 
 MKSNAPSHOT_EXTRA_FLAGS = {
   'gcc': {
@@ skipping 154 matching lines @@
     'arch:ia32': {
       'CCFLAGS':      ['-m32'],
       'LINKFLAGS':    ['-m32']
     },
     'arch:x64': {
       'CCFLAGS':      ['-m64'],
       'LINKFLAGS':    ['-m64']
     },
     'arch:mips': {
       'CPPDEFINES':   ['V8_TARGET_ARCH_MIPS'],
+      'mips_arch_variant:mips32r2': {
+        'CPPDEFINES':    ['_MIPS_ARCH_MIPS32R2']
+      },
       'simulator:none': {
-        'CCFLAGS':      ['-EL', '-mips32r2', '-Wa,-mips32r2', '-fno-inline'],
+        'CCFLAGS':      ['-EL'],
         'LINKFLAGS':    ['-EL'],
-        'LDFLAGS':      ['-EL']
+        'mips_arch_variant:mips32r2': {
+          'CCFLAGS':      ['-mips32r2', '-Wa,-mips32r2']
+        },
+        'mips_arch_variant:mips32r1': {
+          'CCFLAGS':      ['-mips32', '-Wa,-mips32']
+        },
+        'library:static': {
+          'LINKFLAGS':    ['-static', '-static-libgcc']
+        },
+        'mipsabi:softfloat': {
+          'CCFLAGS':      ['-msoft-float'],
+          'LINKFLAGS':    ['-msoft-float']
+        },
+        'mipsabi:hardfloat': {
+          'CCFLAGS':      ['-mhard-float'],
+          'LINKFLAGS':    ['-mhard-float']
+        }
       }
     },
     'simulator:arm': {
       'CCFLAGS':      ['-m32'],
       'LINKFLAGS':    ['-m32']
     },
     'simulator:mips': {
       'CCFLAGS':      ['-m32'],
-      'LINKFLAGS':    ['-m32']
+      'LINKFLAGS':    ['-m32'],
+      'mipsabi:softfloat': {
+        'CPPDEFINES':    ['__mips_soft_float=1'],
+      }
     },
     'mode:release': {
       'CCFLAGS':      ['-O2']
     },
     'mode:debug': {
       'CCFLAGS':      ['-g', '-O0'],
       'CPPDEFINES':   ['DEBUG']
     },
   },
   'msvc': {
@@ skipping 260 matching lines @@
   },
   'visibility': {
     'values': ['default', 'hidden'],
     'default': VISIBILITY_GUESS,
     'help': 'shared library symbol visibility (%s)' % VISIBILITY_GUESS
   },
   'pgo': {
     'values': ['off', 'instrument', 'optimize'],
     'default': 'off',
     'help': 'select profile guided optimization variant',
+  },
+  'mipsabi': {
+    'values': ['hardfloat', 'softfloat', 'none'],
+    'default': 'hardfloat',
+    'help': 'generate calling conventiont according to selected mips ABI'
+  },
+  'mips_arch_variant': {
+    'values': ['mips32r2', 'mips32r1'],
+    'default': 'mips32r2',
+    'help': 'mips variant'
   }
 }
 
 
 def GetOptions():
   result = Options()
   result.Add('mode', 'compilation mode (debug, release)', 'release')
   result.Add('sample', 'build sample (shell, process, lineprocessor)', '')
   result.Add('cache', 'directory to use for scons build cache', '')
   result.Add('env', 'override environment settings (NAME0:value0,NAME1:value1,...)', '')
@@ skipping 176 matching lines @@
       print "Warning: forcing architecture to match simulator (%s)" % options['simulator']
     options['arch'] = options['simulator']
   if (options['prof'] != 'off') and (options['profilingsupport'] == 'off'):
     # Print a warning if profiling is enabled without profiling support
     print "Warning: forcing profilingsupport on when prof is on"
     options['profilingsupport'] = 'on'
   if os == 'win32' and options['pgo'] != 'off' and options['msvcltcg'] == 'off':
     if 'msvcltcg' in ARGUMENTS:
       print "Warning: forcing msvcltcg on as it is required for pgo (%s)" % options['pgo']
     options['msvcltcg'] = 'on'
-  if options['arch'] == 'mips':
-    if ('regexp' in ARGUMENTS) and options['regexp'] == 'native':
-      # Print a warning if native regexp is specified for mips
-      print "Warning: forcing regexp to interpreted for mips"
-    options['regexp'] = 'interpreted'
+    if (options['simulator'] == 'mips' and options['mipsabi'] != 'softfloat'):
+      # Print a warning if soft-float ABI is not selected for mips simulator
+      print "Warning: forcing soft-float mips ABI when running on simulator"
+      options['mipsabi'] = 'softfloat'
+    if (options['mipsabi'] != 'none') and (options['arch'] != 'mips') and (options['simulator'] != 'mips'):
+      options['mipsabi'] = 'none'
   if options['liveobjectlist'] == 'on':
     if (options['debuggersupport'] != 'on') or (options['mode'] == 'release'):
       # Print a warning that liveobjectlist will implicitly enable the debugger
       print "Warning: forcing debuggersupport on for liveobjectlist"
     options['debuggersupport'] = 'on'
     options['inspector'] = 'on'
     options['objectprint'] = 'on'
 
 
 def ParseEnvOverrides(arg, imports):
@@ skipping 161 matching lines @@
 # version of scons.  Also, there's a bug in some revisions that
 # doesn't allow this flag to be set, so we swallow any exceptions.
 # Lovely.
 try:
   SetOption('warn', 'no-deprecated')
 except:
   pass
 
 
 Build()