
I'm attempting to install the gsl package using the following command:

install.packages("c:/users/mike/documents/R/win-library/gsl_1.9-9.tar.gz",repos=NULL,type="source")

My attempt is failing.  Please help.

The message supplied is:

Installing package(s) into ‘C:/Users/Mike/Documents/R/win-library/2.15’
(as ‘lib’ is unspecified)
* installing *source* package 'gsl' ...
** package 'gsl' successfully unpacked and MD5 sums checked

   **********************************************
   WARNING: this package has a configure script
         It probably needs manual configuration
   **********************************************


** libs
gcc -m64 -I"C:/PROGRA~1/R/R-215~1.0/include" -DNDEBUG -I/include    -I"d:/RCompile/CRANpkg/extralibs64/local/include"     -O2 -Wall  -std=gnu99 -mtune=core2 -c airy.c -o airy.o
airy.c:1: sorry, unimplemented: 64-bit mode not compiled in
airy.c:1: error: bad value (core2) for -mtune= switch
C:/PROGRA~1/R/R-215~1.0/etc/x64/Makeconf:172: recipe for target `airy.o' failed
make: *** [airy.o] Error 1
ERROR: compilation failed for package 'gsl'
* removing 'C:/Users/Mike/Documents/R/win-library/2.15/gsl'
Warning messages:
1: running command 'C:/PROGRA~1/R/R-215~1.0/bin/x64/R CMD INSTALL -l "C:/Users/Mike/Documents/R/win-library/2.15"   "c:/users/mike/documents/R/win-library/gsl_1.9-9.tar.gz"' had status 1 
2: In install.packages("c:/users/mike/documents/R/win-library/gsl_1.9-9.tar.gz",  :
  installation of package ‘c:/users/mike/documents/R/win-library/gsl_1.9-9.tar.gz’ had non-zero exit status
 		 	   		  
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