Subject: RE: [R] Link with C code
From: Richards, Tom (richards@pci.upmc.edu)
Date: Wed 31 Jan 2001 - 02:17:24 EST
Message-ID: <5B9B19C8A522D411A8EC00A0C99D6A9A02E6F0@mail.nsabp.pitt.edu>
Hello:
I need to ask a small question about the *recommended* compiler for
Windows, mingw32 gcc 2.95.2. Suppose that I have a file called doit.c, and
a file doit.def which specifies that the function foo() be exported. I need
to link against Rdll.lib, to make doit.dll, which I want to load into R
1.2.1. What are the correct mingw32 commands to do this? After playing
with gcc, dlltools, dllwrap, and S Programming for some time, all I have
come up with is
gcc -O2 -c doit.c -ID:\Rw1021\src\include
dlltool -e doit.exp -l doit.lib --export-all-symbols doit.o
gcc doit.o doit.exp D:\Rw1021\bin\Rdll.lib -o doit.dll
The first line works perfectly, thanks to Sprog, but I cannot get the
compiler to find Rdll.lib. Every time I run the script above, I get the
same mesage that VC++ 6.0 gives when I fail to link against Rdll.lib. Can
anyone help? thanks in advance.
Tom Richards
> -----Original Message-----
> From: Patrick Wendel [mailto:p.wendel@ic.ac.uk]
> Sent: Tuesday, January 30, 2001 8:05 AM
> To: r-help@stat.math.ethz.ch
> Subject: [R] Link with C code
>
>
>
>
> Hello,
>
> I am using cygwin (latest version) and I managed to generate
> a dll partly
> with rcmd shlib although there was a problem with both the
> resouce file (I
> had to remove "FILEOS VOS__WINDOWS32") and the command line for gcc
> (--shared is not supported for instance).
>
> So I would like to know which compiler/environment you advise
> to use for
> windows OS.
>
> Then I could load the library in R but couldn't call any method.
>
> Is there a function to know which functions have been
> successfully imported
> ?
>
> I've also done the dll in other ways (using gcc and dlltool
> as explained on
> their website and also using VC++) but I had the same result.
>
> I suppose I missed something in the dll creation but I cannot
> see what.
>
> Any idea ?
>
> Many thanks,
>
> Patrick Wendel
>
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