Windows cross compiles

Erik Joelsson erik.joelsson at
Mon Aug 26 12:10:23 UTC 2013

This is true, but I think there is a workaround in place when cross 
compiling (using the bootjdk). For a correct build, this requires the 
bootjdk to be recent enough.


On 2013-08-26 13:35, Ivan Krylov wrote:
> 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>  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

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