install v8

Question

I'm trying to install Google v8 engine to my account.

Tried to "make" it from guides posted at http://code.google.com/p/v8/wiki/BuildingWithGYP
but I'm getting this error:

$ make
  ....    
  CXX(target) /home/tocka/sources/v8/v8/out/ia32.release/obj.target/preparser_lib/src/scanner.o
  CXX(target) /home/tocka/sources/v8/v8/out/ia32.release/obj.target/preparser_lib/src/strtod.o
  CXX(target) /home/tocka/sources/v8/v8/out/ia32.release/obj.target/preparser_lib/src/token.o
  CXX(target) /home/tocka/sources/v8/v8/out/ia32.release/obj.target/preparser_lib/src/unicode.o
  CXX(target) /home/tocka/sources/v8/v8/out/ia32.release/obj.target/preparser_lib/src/utils.o
  AR(target) /home/tocka/sources/v8/v8/out/ia32.release/obj.target/tools/gyp/libpreparser_lib.a
  CXX(target) /home/tocka/sources/v8/v8/out/ia32.release/obj.target/preparser/preparser/preparser-process.o
  LINK(target) /home/tocka/sources/v8/v8/out/ia32.release/preparser
  CXX(target) /home/tocka/sources/v8/v8/out/ia32.release/obj.target/v8_base/src/accessors.o
cc1plus: warnings being treated as errors
../src/heap.h: In member function ‘v8::internal::byte** v8::internal::Heap::store_buffer_top_address()’:
../src/heap.h:1314: warning: dereferencing type-punned pointer will break strict-aliasing rules
make[1]: *** [/home/tocka/sources/v8/v8/out/ia32.release/obj.target/v8_base/src/accessors.o] Error 1
make[1]: Leaving directory `/home/tocka/sources/v8/v8/out'
make: *** [ia32.release] Error 2
$

I have no idea how to debug this...

edit:

In response to @waynek, I tried once again, with the following commands, got exactly the same result:

export TEMPDIR=$HOME/tmp
mkdir -p $HOME/tmp
cd $HOME/tmp
git clone git://github.com/v8/v8.git v8 && cd v8
make dependencies
make ia32.release  # It's a 32 bit machine, less than web300

Troubleshooting section of http://docs.webfaction.com/software/home-install.html#installing-software-from-source refers only to problems during configure step.

Accepted Answer

Hello,

I am providing the solution to the problem here, in case anyone else runs into the same problem:

The compiler is set to treat any compile warnings as errors:

cc1plus: warnings being treated as errors

and that can be turned off by specifying this option when make-ing (see http://code.google.com/p/v8/wiki/BuildingWithGYP, Optional parameters):

make werror=no

The actual error relates to strict-aliasing, which option can be turned off:

make werror=no strictaliasing=off

If compiling for a x64 platform, then:

make x64 werror=no strictaliasing=off

Sincerely,

Valentin I.
WebFaction Support

WebFaction - Smarter web hosting
http://webfaction.com
http://twitter.com/webfaction - http://facebook.com/webfaction

Answer 2

Try building it for x64 if you are on web300+ (CentOS 6), with:

make x64.release

(assuming you don't need the debug build also, otherwise just make x64)

If that still doesn't work then try setting the build environment variables specified in our guide for installing software from source and see if that helps. If it's still not working after that then please log a support ticket and we will be able to look more closely at what's going on.

install v8

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