How I can find out on which platform I am running (32/64 bits)?

[Joachim Just]

I wonder whether within ruby there is a method to find out on which
platform my application is running.

Unfortunately, the application has to know if it is a 32-bit or 64-bit
system.

Any hints are highly appreciated.

Joachim Just

 

[Ara.T.Howard]

I wonder whether within ruby there is a method to find out on which platform
my application is running.

Unfortunately, the application has to know if it is a 32-bit or 64-bit
system.

Any hints are highly appreciated.

untested, but

[42].pack('L').size * 8 # => 32

this should be the number of bits per long.

you may also be able to get something from Config::CONFIG

hth.

-a
--
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| email :: ara [dot] t [dot] howard [at] noaa [dot] gov
| phone :: 303.497.6469
| My religion is very simple. My religion is kindness.
| --Tenzin Gyatso
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[WATANABE Hirofumi]

Hi,

I wonder whether within ruby there is a method to find out on which
platform my application is running.

Unfortunately, the application has to know if it is a 32-bit or 64-bit
system.

Any hints are highly appreciated.

64-bit % ruby -ve 'p [0].pack("l!").size'
ruby 1.9.0 (2005-05-31) [x86_64-netbsd]
8

32-bit % ruby -ve 'p [0].pack("l!").size'
ruby 1.9.0 (2005-06-13) [i386-linux]
4

 

[Daniel Berger]

Hi,

I wonder whether within ruby there is a method to find out on which
platform my application is running.

Unfortunately, the application has to know if it is a 32-bit or 64-bit
system.

Any hints are highly appreciated.

64-bit % ruby -ve 'p [0].pack("l!").size'
ruby 1.9.0 (2005-05-31) [x86_64-netbsd]
8

32-bit % ruby -ve 'p [0].pack("l!").size'
ruby 1.9.0 (2005-06-13) [i386-linux]
4

That doesn't tell me much on Solaris:

ruby -ve 'p [0].pack("l!").size'

ruby 1.8.2 (2004-12-25) [sparc-solaris2.10]

Ara's approach should work fine, though.

Finding the bitness of Ruby itself is easy. Finding a cross platform
way to find the bitness of the OS itself is another matter. I'm not
sure what the OP is after.

If anyone knows of a good, cross-platform way of finding the bitness of
the OS itself, I'd like to know that myself.

Regards,

Dan

 

[Charles Mills]

Hi,

I wonder whether within ruby there is a method to find out on which
platform my application is running.

Unfortunately, the application has to know if it is a 32-bit or 64-bit
system.

Any hints are highly appreciated.

64-bit % ruby -ve 'p [0].pack("l!").size'
ruby 1.9.0 (2005-05-31) [x86_64-netbsd]
8

32-bit % ruby -ve 'p [0].pack("l!").size'
ruby 1.9.0 (2005-06-13) [i386-linux]
4

That doesn't tell me much on Solaris:

ruby -ve 'p [0].pack("l!").size'

ruby 1.8.2 (2004-12-25) [sparc-solaris2.10]

Ara's approach should work fine, though.

Finding the bitness of Ruby itself is easy. Finding a cross platform
way to find the bitness of the OS itself is another matter. I'm not
sure what the OP is after.

If anyone knows of a good, cross-platform way of finding the bitness of
the OS itself, I'd like to know that myself.

Regards,

Dan

irb(main):001:0> [1].pack('L')
=> "\001\000\000\000"
irb(main):002:0> [0x01020304].pack('L')
=> "\004\003\002\001"

So I'm on a little endian machine.

-Charlie