function preorder($root) configure:3438: $? = 0configure:3427: gcc -v >&5Using built-in Target: i686-apple-darwin11Configured with: /private/var/tmp/llvmgcc42/llvmgcc42-11~182/src/configure --disable-checking --enable-werror --prefix=/Applications/Xapp/Contents/Developer/usr/llvm-gcc-2 --mandir=/share/man --enable-languages