Patch for R's Makeconf on Mavericks (uses clang and gfortran)

Makeconf_patch

--- /Library/Frameworks/R.framework/Resources/etc/Makeconf	2013-09-25 08:59:05.000000000 -0300
+++ Makeconf	2014-03-03 13:01:00.000000000 -0400
@@ -14,11 +14,11 @@
 AWK = awk
 BLAS_LIBS = -L$(R_HOME)/lib$(R_ARCH) -lRblas
 C_VISIBILITY = 
-CC = llvm-gcc-4.2 -arch x86_64 -std=gnu99
+CC = clang -arch x86_64 -std=gnu99
 CFLAGS = -mtune=core2 -g -O2 $(LTO)
 CPICFLAGS = -fPIC
 CPPFLAGS = -I/usr/local/include
-CXX = llvm-g++-4.2 -arch x86_64
+CXX = clang++ -arch x86_64
 CXXCPP = $(CXX) -E
 CXXFLAGS = -mtune=core2 -g -O2 $(LTO)
 CXXPICFLAGS = -fPIC
@@ -31,14 +31,14 @@
 ECHO_N = 
 ECHO_T = 
 ## NB, set FC before F77 as on Solaris make, setting FC sets F77
-FC = gfortran-4.2 -arch x86_64
+FC = gfortran -arch x86_64
 FCFLAGS = -g -O2 $(LTO)
 ## additional libs needed when linking with $(FC), e.g. on Solaris
 FCLIBS = 
-F77 = gfortran-4.2 -arch x86_64
+F77 = gfortran -arch x86_64
 F77_VISIBILITY = 
 FFLAGS = -g -O2 $(LTO)
-FLIBS =  -L/usr/local/lib/gcc/i686-apple-darwin8/4.2.3/x86_64 -L/usr/local/lib/x86_64 -L/usr/local/lib/gcc/i686-apple-darwin8/4.2.3 -lgfortran
+FLIBS =  -L/usr/local/lib/gcc/i686-apple-darwin8/4.2.3/x86_64 -L/usr/local/lib/x86_64 -L/usr/local/lib/gcc/i686-apple-darwin8/4.2.3
 FCPICFLAGS = -fno-common
 FPICFLAGS = -fPIC
 FOUNDATION_CPPFLAGS =