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Re: 32-bit libraries in 64-bit build.


On 5/20/09 9:03 AM, "Bob Plantz" <plantz@cds1.net> wrote:

> On Wed, 2009-05-20 at 07:47 -0700, Ian Lance Taylor wrote:
>> Brian McGrew <brian@visionpro.com> writes:
>> 
>>> Is there any way of using a 32-bit library in a 64-bit build environment???
>>> Our entire software build is 64-bit but I need to use a vendors library that
>>> is only 32-bit and never will be 64-bit.  Any such way of accomplishing this
>>> task?
>> 
>> No.  If an x86 processor is running in 64-bit mode, then it can not
>> execute code compiled in 32-bit mode.  The two modes are not compatible.
>> 
>> The closest you can come is to write a 32-bit wrapper program around the
>> library, run it in a separate process, and use some sort of RPC to
>> communicate with it.
>> 
>> Ian
> 
> Wouldn't this depend on whether it is statically linked or dynamic? I
> could certainly use 32-bit mode calling conventions in my 64-bit code
> and call a function that uses only 32-bit instructions.
> 
> (I'm probably revealing my ignorance of libraries here.)
> 
-- 

Interesting...

My code... 64-bit C++ compiled with g++.
Their code... 32-bit C compiled DYNAMICLY with gcc.

???

I have much more ignorance than you Bob, so...

-b


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