[Rd] Problems compiling C code on windows

[Uwe Ligges]

Victor Trevino wrote:

> Hi all,
> 
>  
> 
> I can't get my C routines running on a windows box. I have no problems at
> all in Linux.
> 
>  
> 
> On windows, I have installed cygwin and the compilation works well but once
> I execute "dyn.load(.)" it hangs whatever I use C/C++ interfaces.


cygwin is not supported. Please read the manuals on how to set upo a 
working environment under Windows.

Uwe Ligges



>  
> 
> In Linux it works wonderful but I need to get this code running on windows
> boxes.
> 
> I know that the problem should be something with the dll generation/linkage
> in windows but I can't figure out.
> 
>  
> 
> As a matter of test I did the following C code:
> 
>  
> 
> #include <R.h>
> 
> #include <Rinternals.h>
> 
> SEXP thisisatest(SEXP);
> 
> SEXP thisisatest(SEXP a)
> 
> {
> 
>             long int i;
> 
>             if (!isReal(a)) printf("Vector should be double.\n");
> 
>             for (i=LENGTH(a)-1; i >=0; i--) {
> 
>                         REAL(a)[i] = REAL(a)[i] + 1;
> 
>             }
> 
>             return (a);
> 
> }
> 
>  
> 
>  
> 
>  
> 
> Linux output:
> 
> R CMD SHLIB thisisthetest.c
> 
> gcc -I/usr/lib/R/include  -I/usr/local/include -D__NO_MATH_INLINES -mieee-fp
> -fPIC  -O2 -g -pipe -march=i386 -mcpu=i686 -c thisisthetest.c -o
> thisisthetest.o
> 
> g++ -shared -L/usr/local/lib -o thisisthetest.so thisisthetest.o   
> 
>  
> 
> In R:
> 
> 
>>dyn.load("thisisthetest.so")
> 
> 
>>.Call("thisisatest",5)
> 
> 
> [1] 6
> 
> 
> 
> [[ WONDERFUL ]]
> 
>  
> 
>  
> 
>  
> 
>  
> 
> Windows output:
> 
> L:\R>Rcmd SHLIB thisisthetest.c
> 
> making thisisthetest.d from thisisthetest.c
> 
> gcc   -IC:/PROGRA~1/R/rw2001/include -Wall -O2   -c thisisthetest.c -o
> thisisthetest.o 
> 
> ar cr thisisthetest.a thisisthetest.o
> 
> ranlib thisisthetest.a
> 
> gcc  --shared -s  -o thisisthetest.dll thisisthetest.def thisisthetest.a
> -LC:/PROGRA~1/R/rw2001/src/gnuwin32  -lg2c -lR
> 
>  
> 
> In R:
> 
> 
>>dyn.load("thisisthetest.dll")
> 
> 
>  [[ IT HANGS ]]
> 
>  
> 
>  
> 
>  
> 
> I have tried different combinations in paths (for library search) and
> compiling inside cygwin. no success. 
> 
>  
> 
> Any comments are very very very welcome.
> 
>  
> 
>  
> 
> Thanks !
> 
>  
> 
>  
> 
> 
> 	[[alternative HTML version deleted]]
> 
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