[BioC] preprocessCore "Undefined log2" installation error

[Bruce Hayward]

I'm running FreeBSD8.2 on an Intel Core2Duo
I have installed the basic R package via the FreeBSD ports to version 2.12.2
My attempts to install the basic Bioconductor package fails when 
preprocessCore installation fails.

Followed the standard installation instructions at Bioconductor:

 > source("http://bioconductor.org/biocLite.R")
 > biocLite("preprocessCore")

which generated the following complaint in amongst the rest of the build:

gcc45 -std=gnu99 -I/usr/local/lib/R/include     -g -O2  
-DPACKAGE_NAME=\"\" -DPACKAGE_TARNAME=\"\" -DPACKAGE_VERSION=\"\" 
-DPACKAGE_STRING=\"\" -DPACKAGE_BUGREPORT=\"\" -DHAVE_LIBPTHREAD=1 
-DUSE_PTHREADS=1 -fpic  -O2 -pipe -Wl,-rpath=/usr/local/lib/gcc45 
-fno-strict-aliasing -c median_log.c -o median_log.o
median_log.c: In function 'medianlog':
median_log.c:137:7: warning: implicit declaration of function 'log2'
median_log.c:137:19: warning: incompatible implicit declaration of 
built-in function 'log2'
median_log.c: In function 'medianlog_no_copy':
median_log.c:154:25: warning: incompatible implicit declaration of 
built-in function 'log2'
gcc45 -std=gnu99 -I/usr/local/lib/R/include     -g -O2  
-DPACKAGE_NAME=\"\" -DPACKAGE_TARNAME=\"\" -DPACKAGE_VERSION=\"\" 
-DPACKAGE_STRING=\"\" -DPACKAGE_BUGREPORT=\"\" -DHAVE_LIBPTHREAD=1 
-DUSE_PTHREADS=1 -fpic  -O2 -pipe -Wl,-rpath=/usr/local/lib/gcc45 
-fno-strict-aliasing -c medianpolish.c -o medianpolish.o

leading to:

** R
** inst
** preparing package for lazy loading
** help
*** installing help indices
** building package indices ...
** testing if installed package can be loaded
Error in dyn.load(file, DLLpath = DLLpath, ...) :
   unable to load shared object 
'/usr/local/lib/R/library/preprocessCore/libs/preprocessCore.so':
   /usr/local/lib/R/library/preprocessCore/libs/preprocessCore.so: 
Undefined symbol "log2"
ERROR: loading failed
* removing '/usr/local/lib/R/library/preprocessCore'


Any suggestions?