Merge branch 'scale-amd64' of git+ssh://pdos.csail.mit.edu/home/am0/6.828/xv6 into scale-amd64

b4432448 · Nickolai Zeldovich · 9bb49ce2 · cc82ee1f · b4432448
--- a/README
+++ b/README
@@ -33,9 +33,13 @@
  (gdb) c

 * Mac cross compiler gcc-4.6.2
+  compiler without libstdc++
  download, make, make install gmp-5.0.4, mpfr-3.1.0, and mpc-0.9
  for mpfr and mpc: ./configure --with-gmp=/usr/local
-  for gcc: ../configure --target=x86_64-jos-elf  --with-gmp=/usr/local/ --with-mpfr=/usr/local --enable-languages=c,c++ --without-headers --disable-nls
+  for gcc: 
+  mkdir build
+  cd build
+  ../configure --target=x86_64-jos-elf  --with-gmp=/usr/local/ --with-mpfr=/usr/local --enable-languages=c,c++ --without-headers --disable-nls

 * clang 
  - Version 3.0 or greater is required to build xv6