Hi! Just a little note to libc++'s lib/buildit script: EXTRA_FLAGS="-std=c++0x -fstrict-aliasing -Wall -Wextra -Wshadow -Wconversion \ -Wnewline-eof -Wpadded -Wmissing-prototypes -Wstrict-aliasing=2 \ -Wstrict-overflow=4" And later: EXTRA_FLAGS+="-isysroot ${SDKROOT}" I think there is a missing space. regards, Samuel