__GETOPT_XCONCAT 36 maint/gnulib/lib/getopt-pfx-core.h # define __GETOPT_XCONCAT(x, y) __GETOPT_CONCAT (x, y) __GETOPT_XCONCAT 36 maint/gnulib/lib/getopt-pfx-ext.h # define __GETOPT_XCONCAT(x, y) __GETOPT_CONCAT (x, y)