Comment #15 on issue 615 by [email protected]: "instanceof" operator broken
in V8 v2.0.6.4
http://code.google.com/p/v8/issues/detail?id=615
~]scons arch=x64 library=shared sample=shell mode=debug
libv8_g.so, shell_g<<<
~]./shell_g -e "print([] instanceof Array)"
true
------
~]gcc --version
gcc (GCC) 4.1.2 20061115 (prerelease) (Debian 4.1.1-21)
OK, made the changes to SConstruct. However, I got an error:
~]scons arch=x64 library=shared
gcc -o obj/release/dtoa-config.os -c -Werror -Wno-uninitialized -m64 -O3
-fomit-
frame-pointer -fdata-sections -ffunction-sections -ansi
--fno-strict-aliasing -fPIC -
DV8_TARGET_ARCH_X64 -DV8_SHARED -DENABLE_DEBUGGER_SUPPORT
-DV8_NATIVE_REGEXP -
DENABLE_LOGGING_AND_PROFILING -Isrc src/dtoa-config.c
cc1: error: unrecognized command line option "-ffno-strict-aliasing"
scons: *** [obj/release/dtoa-config.os] Error 1
scons: building terminated because of errors.
I double checked, I didn't mistype as -ffno. So then I observed that the
other
options in SConstruct already had "-fno-strict-aliasing" instead
of "--fno-strict-
aliasing" (one - instead of --). So I changed the two entries you suggested
to use
the one - version of the flag and retried the scons compile.
The relevant lines in SConstruct now look like:
if os.environ.get('GCC_VERSION') == '44':
GCC_EXTRA_CCFLAGS = ['-fno-tree-vrp', '-fno-strict-aliasing']
GCC_DTOA_EXTRA_CCFLAGS = ['-fno-strict-aliasing']
else:
GCC_EXTRA_CCFLAGS = ['-fno-strict-aliasing']
GCC_DTOA_EXTRA_CCFLAGS = []
~]scons arch=x64 library=shared
libv8.so<<<
~]scons arch=x64 library=shared sample=shell
shell<<<
~]./shell -e "print([] instanceof Array)"
false
:( :( :(
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