R devel - Oct 2010 - Creating a Windows import lib from R.dll (x64)?

Hello,

The procedure for creating an import library (Rdll.lib) that is documented
in gnuwin32/README.packages works fine using the i386 architecture, but
it doesn't seem to work under x64.

Specifically, the procedure is:
pexports R.dll > R.exp
lib /def:R.exp /out:Rdll.lib /machine:X86 R.dll

There are two issues under x64:
1. Older version of pexports crash when applied to an x64 R.dll.
    The work-around is to use one of the newer versions that have
    been fixed (pexports-9.44, say).
2. When lib is applied to an x64 R.dll it complains as follows:
R.dll : fatal error LNK1107: invalid or corrupt file: cannot read at 0x318

This happens even when the /def:R.exp parameter is left out, for
example, with lib /out:Rdll.lib R.dll.

Any tips would be much appreciated.

Thanks,
Dominick

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On 10/18/2010 10:00 PM, Dominick Samperi wrote:
> 
> The procedure for creating an import library (Rdll.lib) that is documented
> in gnuwin32/README.packages works fine using the i386 architecture, but
> it doesn't seem to work under x64.
> 
> Specifically, the procedure is:
> pexports R.dll > R.exp
> lib /def:R.exp /out:Rdll.lib /machine:X86 R.dll
> 
> There are two issues under x64:
> 1. Older version of pexports crash when applied to an x64 R.dll.
>     The work-around is to use one of the newer versions that have
>     been fixed (pexports-9.44, say).
> 2. When lib is applied to an x64 R.dll it complains as follows:
> R.dll : fatal error LNK1107: invalid or corrupt file: cannot read at 0x318
> 
> This happens even when the /def:R.exp parameter is left out, for
> example, with lib /out:Rdll.lib R.dll.
> 
> Any tips would be much appreciated.
I successfully did the following recently in order to build 64 bit PL/R
on Windows 7:

----------------
dumpbin /exports R.dll > R.dump.csv

Note that I used the csv extension so OpenOffice would import the file
into a spreadsheet conveniently.

Edit R.dump.csv to produce a one column file of symbols called R.def.
Add the following two lines to the top of the file:
 LIBRARY R
 EXPORTS

Then run the following using R.def

 lib /def:R.def /out:R.lib
----------------

HTH,

Joe


-- 
Joe Conway
credativ LLC: http://www.credativ.us
Linux, PostgreSQL, and general Open Source
Training, Service, Consulting, & 24x7 Support

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Thanks Joe, obviously I made the error of including R.dll on the command
line,
sorry for the wasted bandwidth.

On Tue, Oct 19, 2010 at 1:22 AM, Joe Conway <mail@joeconway.com> wrote:
> On 10/18/2010 10:00 PM, Dominick Samperi wrote:
> >
> > The procedure for creating an import library (Rdll.lib) that is
> documented
> > in gnuwin32/README.packages works fine using the i386 architecture,
but
> > it doesn't seem to work under x64.
> >
> > Specifically, the procedure is:
> > pexports R.dll > R.exp
> > lib /def:R.exp /out:Rdll.lib /machine:X86 R.dll
> >
> > There are two issues under x64:
> > 1. Older version of pexports crash when applied to an x64 R.dll.
> >     The work-around is to use one of the newer versions that have
> >     been fixed (pexports-9.44, say).
> > 2. When lib is applied to an x64 R.dll it complains as follows:
> > R.dll : fatal error LNK1107: invalid or corrupt file: cannot read at
> 0x318
> >
> > This happens even when the /def:R.exp parameter is left out, for
> > example, with lib /out:Rdll.lib R.dll.
> >
> > Any tips would be much appreciated.
>
> I successfully did the following recently in order to build 64 bit PL/R
> on Windows 7:
>
> ----------------
> dumpbin /exports R.dll > R.dump.csv
>
> Note that I used the csv extension so OpenOffice would import the file
> into a spreadsheet conveniently.
>
> Edit R.dump.csv to produce a one column file of symbols called R.def.
> Add the following two lines to the top of the file:
>  LIBRARY R
>  EXPORTS
>
> Then run the following using R.def
>
>  lib /def:R.def /out:R.lib
> ----------------
>
> HTH,
>
> Joe
>
>
> --
> Joe Conway
> credativ LLC: http://www.credativ.us
> Linux, PostgreSQL, and general Open Source
> Training, Service, Consulting, & 24x7 Support
>
>
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