On 04/07/2014 9:47 AM, Dalthorp, Daniel wrote:
Thank-you for the prompt and helpful response. It sounds like all I
need is a very simple fix, but it eludes me.
I am trying to call a custom C function from R to speed a calculation.
I'm on Windows 7 with R 3.0.2 and the latest Rtools. I run R CMD SHLIB
cfunc.c from the DOS command line and a.dll is created. In R,
dyn.load("cfunc.dll") works fine with 32-bit R but fails with 64-bit
("LoadLibrary failure: %1 is not a valid Win32 application", where
"%1" refers to cfunc.dll).
The first part of my PATH reads:
c:\Rtools\bin;C:\Rtools\gcc-4.6.3\bin;C:\Program Files\R\R-3.0.2\bin\x64
If you run R CMD SHLIB you should by default get the same architecture
as the version of R that you used. For example, if I have 64 bit R
first on my path I see this:
$ R CMD SHLIB test.c
gcc -m64 -I"F:/R/svn/r-devel/R64/include" -DNDEBUG -O2 -Wall
-std=gnu9
9 -mtune=core2 -c test.c -o test.o
gcc -m64 -shared -s -static-libgcc -o test.dll tmp.def test.o
-LF:/R/svn/r-devel
/R64/bin/x64 -lR
That's a 64 bit build. If I have 32 bit R first, I see this:
$ R CMD SHLIB test.c
gcc -I"F:/R/svn/r-devel/R/include" -DNDEBUG -O3 -Wall
-std=gnu99 -mtu
ne=core2 -c test.c -o test.o
gcc -shared -s -static-libgcc -o test.dll tmp.def test.o
-LF:/R/svn/r-devel/R/bi
n/i386 -lR
That's a 32 bit build. From the look of your PATH, you should have 64
bit R first, but you say you're getting 32 bit DLLs, which doesn't make
any sense. I'll assume you've got a typo in your message somewhere, but
you probably want to check what
R --version
prints to be sure.
Duncan Murdoch
-Dan
On Fri, Jul 4, 2014 at 3:21 AM, Duncan Murdoch
<murdoch.dun...@gmail.com <mailto:murdoch.dun...@gmail.com>> wrote:
On 03/07/2014, 7:53 PM, Dalthorp, Daniel wrote:> I've seen that many
people have had trouble using Rtools for a 64-bit
> compile of C functions. For some, a quick change in path statement
seems to
> corrects the problem; for others, apparently not. For me? I've been
working
> at path statements and install/uninstall/reinstall of all sorts
of things
> for four hours now with no success. The 32-bit dll loads fine, but I
need a
> 64-bit version.
>
> Is there an option to tell the compiler with Rtools to use
64-bit? Or
a way
> to kill off the 32-bit version on my machine so I don't need to
worry
about
> it?
>
> Any guidance would be greatly appreciated!
Your post is far too vague. Where have you seen all these problems?
What are you doing?
Of course the tools in Rtools have options to select the architecture,
but users normally don't need to set those manually. If you're
building
R, use "MULTI=64" on the make command.
If you're calling compilers directly, use the appropriate command line
option or prefix for that compiler. These are all listed in the
MkRules
file in src/gnuwin32/MkRules.dist in the R sources, or in the help
pages
for the commands.
Duncan Murdoch
--
Dan Dalthorp, PhD
Statistician
USGS Forest and Rangeland Ecosystem Science Center
Forest Sciences Lab, Rm 189
3200 SW Jefferson Way
Corvallis, OR 97331
ph: 541-750-0953
ddalth...@usgs.gov <mailto:ddalth...@usgs.gov>
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