extconf.rb in torch-rb-0.1.1

- old
+ new

@@ -2,9 +2,12 @@
 
 abort "Missing stdc++" unless have_library("stdc++")
 
 $CXXFLAGS << " -std=c++11"
 
+# needed for Linux pre-cxx11 ABI version
+# $CXXFLAGS << " -D_GLIBCXX_USE_CXX11_ABI=0"
+
 # silence ruby/intern.h warning
 $CXXFLAGS << " -Wno-deprecated-register"
 
 inc, lib = dir_config("torch")
 