hi all,

I tried to build kudu from source on my mac and get the following error after run "thirdparty/build-if-necessary.sh"

clang: warning: no such sysroot directory: '-mmacosx-version-min=10.5'

/Users/zhenzhang/projects/kudu/thirdparty/src/llvm-3.9.0.src/projects/compiler-rt/lib/builtins/eprintf.c:14:10: fatal error: 'stdio.h' file not found

#include <stdio.h>

Only llvm in the thirdparty failed with such message. All others can build success, do you know how to fix this?