Source
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--- configure.ac.orig 2015-11-27 13:06:16.000000000 -0800
+++ configure.ac 2015-11-27 13:06:37.000000000 -0800
# Checks for header files.
-AC_CHECK_HEADERS_ONCE([locale.h sys/select.h sys/uio.h argp.h
+AC_CHECK_HEADERS_ONCE([locale.h sys/select.h sys/uio.h
unistd.h sys/time.h sys/types.h sys/stat.h])