Problem with loading compiled c code in R x64 using dyn.load
- by Sacha Epskamp
I recently went from a 32bit laptop to a 64bit desktop (both win7). I just found out that I get an error now when loading dll's using dyn.load. I guess this is a simple mistake and I am overlooking something.
For example, I write this simple c function (foo.c):
void foo( int *x) {*x = *x + 1;}
Then compile it in command prompt:
R CMD SHLIB foo.c
Then in 32bit R I can use it in R:
> setwd("R")
> dyn.load("foo.dll")
> .C("foo",as.integer(1))
[[1]]
[1] 2
but in 64bit R I get:
> dyn.load("foo.dll")
Error in inDL(x, as.logical(local), as.logical(now), ...) :
unable to load shared object 'C:/Users/Sacha/Documents/R/foo.dll':
LoadLibrary failure: %1 is not a valid Win32 application.
nd.
