Building with gcc 4.8.2

[Matt Harrison]

If building with gcc 4.8.2 then

run 

    export CXX="g++ -Wno-unused-local-typedefs -Wno-aggressive-loop-optimizations -Wno-narrowing"

before the make to get around the following error related to warnings treated as errors.

Checked out revision 1501.

make[2]: Leaving directory `/home/ubuntu/workspace/SilkJS/src/v8-read-only'

make[2]: Entering directory `/home/ubuntu/workspace/SilkJS/src/v8-read-only'

GYP_GENERATORS=make \

        build/gyp/gyp --generator-output="out" build/all.gyp \

                      -Ibuild/standalone.gypi --depth=. \

                      -Dv8_target_arch=x64 \

                      -S.x64  -Dcomponent=shared_library -Dv8_can_use_vfp3_instructions=true

make[3]: Entering directory `/home/ubuntu/workspace/SilkJS/src/v8-read-only/out'

  CXX(target) /home/ubuntu/workspace/SilkJS/src/v8-read-only/out/x64.release/obj.target/preparser_lib/src/allocation.o

  CXX(target) /home/ubuntu/workspace/SilkJS/src/v8-read-only/out/x64.release/obj.target/preparser_lib/src/atomicops_internals_x86_gcc.o

  CXX(target) /home/ubuntu/workspace/SilkJS/src/v8-read-only/out/x64.release/obj.target/preparser_lib/src/bignum.o

  CXX(target) /home/ubuntu/workspace/SilkJS/src/v8-read-only/out/x64.release/obj.target/preparser_lib/src/bignum-dtoa.o

  CXX(target) /home/ubuntu/workspace/SilkJS/src/v8-read-only/out/x64.release/obj.target/preparser_lib/src/cached-powers.o

  CXX(target) /home/ubuntu/workspace/SilkJS/src/v8-read-only/out/x64.release/obj.target/preparser_lib/src/conversions.o

In file included from ../src/utils.h:36:0,

                 from ../src/conversions.h:31,

                 from ../src/conversions-inl.h:40,

                 from ../src/conversions.cc:32:

../src/scanner.h: In member function 'void v8::internal::Scanner::Init()':

../src/checks.h:251:22: error: typedef '__StaticAssertTypedef__450' locally defined but not used [-Werror=unused-local-typedefs]

     SEMI_STATIC_JOIN(__StaticAssertTypedef__, __LINE__)

                      ^

../src/checks.h:241:39: note: in definition of macro 'SEMI_STATIC_JOIN_HELPER'

 #define SEMI_STATIC_JOIN_HELPER(a, b) a##b

                                       ^

../src/checks.h:251:5: note: in expansion of macro 'SEMI_STATIC_JOIN'

     SEMI_STATIC_JOIN(__StaticAssertTypedef__, __LINE__)

     ^

../src/checks.h:283:30: note: in expansion of macro 'STATIC_CHECK'

 #define STATIC_ASSERT(test)  STATIC_CHECK(test)

                              ^

../src/scanner.h:450:5: note: in expansion of macro 'STATIC_ASSERT'

     STATIC_ASSERT(kCharacterLookaheadBufferSize == 1);

     ^

cc1plus: all warnings being treated as errors

make[3]: *** [/home/ubuntu/workspace/SilkJS/src/v8-read-only/out/x64.release/obj.target/preparser_lib/src/conversions.o] Error 1

make[3]: *** Waiting for unfinished jobs....

make[3]: Leaving directory `/home/ubuntu/workspace/SilkJS/src/v8-read-only/out'

make[2]: *** [x64.release] Error 2

make[2]: Leaving directory `/home/ubuntu/workspace/SilkJS/src/v8-read-only'

make[1]: *** [v8-read-only/out/x64.release/obj.target/tools/gyp/libv8_base.a] Error 2

make[1]: Leaving directory `/home/ubuntu/workspace/SilkJS/src'

make: *** [all] Error 2