function inorder($root)

gcc version 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2336.11.00)

configure:3438: $? = 0

configure:3427: gcc -V >&5

llvm-gcc-4.2: argument to `-V' is missing

configure:3438: $? = 1

configure:3427: gcc -qversion >&5

i686-apple-darwin11-llvm-gcc-4.2: no input files

configure:3438: $? = 1