title: compilation failed for package ‘raster’
body: <p>I have problems to compile the "raster" package.
  I tried 
  install.packages("raster", dependencies = TRUE)
  with no success.
  Any suggestions?
  The main problem is:</p>
  
  <pre><code>g++ -m64 -std=gnu++0x -I/usr/include/R -DNDEBUG  -I"/home/zfgbe/R/x86_64-redhat-linux-gnu-library/3.4/Rcpp/include" -I/usr/local/include   -fpic  -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic -c RasterModule.cpp -o RasterModule.o
  In file included from RasterModule.cpp:2:
  spat.h:158: error: ISO C++ forbids initialization of member ‘crs’
  spat.h:158: error: making ‘crs’ static
  spat.h:158: error: invalid in-class initialization of static data member of non-integral type ‘std::string’
  spat.h: In member function ‘std::string SpRaster::getCRS()’:
  spat.h:200: error: ‘crs’ was not declared in this scope
  spat.h: In member function ‘void SpRaster::setCRS(std::string)’:
  spat.h:201: error: ‘crs’ was not declared in this scope
  make: *** [RasterModule.o] Error 1
  ERROR: compilation failed for package ‘raster’
  </code></pre>