Windows cross compiles

[Ivan Krylov]

The VS compiler supports building 64-bit targets on 32-bit Windows/cl.exe but at some point along the jdk build process the newly built bin\java.exe is being used and that should fail on your 32-bit OS.

0.02,

Ivan

On Aug 26, 2013, at 12:24 PM, Erik Joelsson <erik.joelsson at oracle.com> wrote:

> 
> 
> On 2013-08-26 03:51, David Holmes wrote:
>> On 24/08/2013 11:26 AM, Tim Bell wrote:
>>> On 08/23/13 02:15 PM, Salter, Thomas A wrote:
>>>> Is there any hope of compiling a 64-bit Windows JVM on a 32-bit O/S?
>>> 
>>> We are headed in the other direction with OpenJDK 8 on Windows -
>>> compiling both 32 and 64-bit using Windows 2008R2 64-bit as the O/S and
>>> Visual Studio 2010 SP1 as the compiler.  We have very few 32-bit Windows
>>> systems left, and those we have are dedicated to building earlier JDK
>>> releases.
>> 
>> That aside though, if the windows 32-bit dev tools support building 64-bit binaries (I have no idea if they do) then it should be as simple as configuring with --with-target-bits=64. But so far all our cross-compiling of this form has been on linux and only tested for building 32-bit on a 64-bit host.
>> 
> There is partial support in there, but some details missing. I believe it can be made to work with some tweaks though. The parameter David suggests is the correct starting point.
> 
> /Erik
> 
>> David
>> 
>>> Tim
>>> 
>>>> I tried a few options and other tweaks and got as far as configure
>>>> compiling a 64-bit fixpath.exe and then discovering that it won't run
>>>> on a 32-bit system.
>>>> 
>>>> I don't mind changing the make files but I'm not up for learning how
>>>> to generate the configure script.
>>>> 
>>>> Tom Salter  |  Software Engineer  |  Java & Middleware Development
>>>> Unisys  |  2476 Swedesford Road  |  Malvern, PA  19355   |
>>>> 610-648-2568 |  N385-2568
>>>> 
>>>> 
>>>