Add a --with-libtiff to avoid broken implicit dependencies
Patch by Sebastien Fabbro

--- configure.ac.orig	2012-01-02 17:01:24.000000000 +0000
+++ configure.ac	2012-01-02 17:04:21.000000000 +0000
@@ -396,6 +396,10 @@
 [AS_HELP_STRING([--with-jpeglib],[use jpeglib library (if available) @<:@yes@:>@])],
 [R_ARG_USE(jpeglib)],
 [use_jpeglib=yes])
+AC_ARG_WITH([libtiff],
+[AS_HELP_STRING([--with-libtiff],[use libtiff library (if available) @<:@yes@:>@])],
+[R_ARG_USE(libtiff)],
+[use_libtiff=yes])
 AC_ARG_WITH([system-zlib],
 [AS_HELP_STRING([--with-system-zlib],[use system zlib library (if available) @<:@no@:>@])],
 [R_ARG_USE_SYSTEM(zlib)],
--- m4/R.m4.orig	2012-01-02 17:05:22.000000000 +0000
+++ m4/R.m4	2012-01-02 17:08:08.000000000 +0000
@@ -2005,16 +2005,18 @@
 	      [Define if you have the PNG headers and libraries.])
   fi
 fi
-AC_CHECK_HEADERS(tiffio.h)
-# may need to resolve jpeg routines
-AC_CHECK_LIB(tiff, TIFFOpen, [have_tiff=yes], [have_tiff=no], [${BITMAP_LIBS}])
-if test "x${ac_cv_header_tiffio_h}" = xyes ; then
-  if test "x${have_tiff}" = xyes; then
-    AC_DEFINE(HAVE_TIFF, 1, [Define this if libtiff is available.])
-    BITMAP_LIBS="-ltiff ${BITMAP_LIBS}"
-  else
-    have_tiff=no
-  fi
+if test "${use_libtiff}" = yes; then
+   AC_CHECK_HEADERS(tiffio.h)
+   # may need to resolve jpeg routines
+   AC_CHECK_LIB(tiff, TIFFOpen, [have_tiff=yes], [have_tiff=no], [${BITMAP_LIBS}])
+   if test "x${ac_cv_header_tiffio_h}" = xyes ; then
+     if test "x${have_tiff}" = xyes; then
+      AC_DEFINE(HAVE_TIFF, 1, [Define this if libtiff is available.])
+      BITMAP_LIBS="-ltiff ${BITMAP_LIBS}"
+     else
+	have_tiff=no
+     fi
+   fi
 fi
 AC_SUBST(BITMAP_LIBS)
 ])# R_BITMAPS