MIPS: Improve runtime detection and compatibility wrt arch. revisions.

build/toolchain.gypi

 # Copyright 2013 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 284 matching lines @@
                   ['mips_fpu_mode=="fp64"', {
                     'cflags': ['-mfp64'],
                   }],
                   ['mips_fpu_mode=="fpxx"', {
                     'cflags': ['-mfpxx'],
                   }],
                   ['mips_fpu_mode=="fp32"', {
                     'cflags': ['-mfp32'],
                   }],
                   ['mips_arch_variant=="r6"', {
-                    'cflags!': ['-mfp32'],
+                    'cflags!': ['-mfp32', '-mfpxx'],
                     'cflags': ['-mips32r6', '-Wa,-mips32r6'],
                     'ldflags': [
                       '-mips32r6',
                       '-Wl,--dynamic-linker=$(LDSO_PATH)',
                       '-Wl,--rpath=$(LD_R_PATH)',
                     ],
                   }],
                   ['mips_arch_variant=="r2"', {
                     'cflags': ['-mips32r2', '-Wa,-mips32r2'],
+                    'ldflags': ['-mips32r2'],
                   }],
                   ['mips_arch_variant=="r1"', {
-                    'cflags!': ['-mfp64'],
+                    'cflags!': ['-mfp64', '-mfpxx'],
                     'cflags': ['-mips32', '-Wa,-mips32'],
+                    'ldflags': ['-mips32'],
                   }],
                   ['mips_arch_variant=="rx"', {
-                    'cflags!': ['-mfp64'],
-                    'cflags': ['-mips32', '-Wa,-mips32'],
+                    'cflags!': ['-mfp64', '-mfp32'],
+                    'cflags': ['-mips32', '-Wa,-mips32', '-mfpxx'],
+                    'ldflags': ['-mips32'],
                   }],
                 ],
               }],
             ],
           }],
           [ 'v8_can_use_fpu_instructions=="true"', {
             'defines': [
               'CAN_USE_FPU_INSTRUCTIONS',
             ],
           }],
@@ skipping 60 matching lines @@
                   ['mips_fpu_mode=="fp64"', {
                     'cflags': ['-mfp64'],
                   }],
                   ['mips_fpu_mode=="fpxx"', {
                     'cflags': ['-mfpxx'],
                   }],
                   ['mips_fpu_mode=="fp32"', {
                     'cflags': ['-mfp32'],
                   }],
                   ['mips_arch_variant=="r6"', {
-                    'cflags!': ['-mfp32'],
+                    'cflags!': ['-mfp32', '-mfpxx'],
                     'cflags': ['-mips32r6', '-Wa,-mips32r6'],
                     'ldflags': [
                       '-mips32r6',
                       '-Wl,--dynamic-linker=$(LDSO_PATH)',
                       '-Wl,--rpath=$(LD_R_PATH)',
                     ],
                   }],
                   ['mips_arch_variant=="r2"', {
                     'cflags': ['-mips32r2', '-Wa,-mips32r2'],
+                    'ldflags': ['-mips32r2'],
                   }],
                   ['mips_arch_variant=="r1"', {
-                    'cflags!': ['-mfp64'],
+                    'cflags!': ['-mfp64', '-mfpxx'],
                     'cflags': ['-mips32', '-Wa,-mips32'],
+                    'ldflags': ['-mips32'],
                   }],
                   ['mips_arch_variant=="rx"', {
-                    'cflags!': ['-mfp64'],
-                    'cflags': ['-mips32', '-Wa,-mips32'],
+                    'cflags!': ['-mfp64', '-mfp32'],
+                    'cflags': ['-mips32', '-Wa,-mips32', '-mfpxx'],
+                    'ldflags': ['-mips32'],
                   }],
                   ['mips_arch_variant=="loongson"', {
-                    'cflags!': ['-mfp64'],
+                    'cflags!': ['-mfp64', '-mfp32', '-mfpxx'],
                     'cflags': ['-mips3', '-Wa,-mips3'],
                   }],
                 ],
               }],
             ],
           }],
           [ 'v8_can_use_fpu_instructions=="true"', {
             'defines': [
               'CAN_USE_FPU_INSTRUCTIONS',
             ],
@@ skipping 540 matching lines @@
                 'OptimizeReferences': '2',
                 'EnableCOMDATFolding': '2',
               },
             },
           }],  # OS=="win"
         ],  # conditions
       },  # Release
     },  # configurations
   },  # target_defaults
 }