diff --git a/Makefile b/Makefile
index 9cabefc..2ae4280 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
 # may or may not work, most stuff okay on:
 # gcc (Ubuntu/Linaro 4.6.3-1ubuntu5) 4.6.3
-# CXX=g++
-# CPPFLAGS=-Wall -g -std=c++0x -pthread
+CXX=g++
+CPPFLAGS=-Wall -g -std=c++0x -pthread
 
 # works with g++-4.7:
 # CXX=g++-4.7
@@ -9,8 +9,8 @@
 
 # works on clang 3.2 build following this:
 # http://solarianprogrammer.com/2011/10/16/llvm-clang-libc-linux/
-CXX=clang++
-CPPFLAGS=-Wall -g -std=c++0x -stdlib=libc++ -L/opt/clang/lib -pthread
+# CXX=clang++
+# CPPFLAGS=-Wall -g -std=c++0x -stdlib=libc++ -L/opt/clang/lib -pthread
 
 all: auto constexpr ilists init init_new lambda loops thread thread2 tuple