#!/bin/sh## Figure out (i) the type of dev_t (ii) the defines for loop stuff## Output of this script is normally redirected to "loop.h".# Since 1.3.79 there is an include file <asm/posix_types.h># that defines __kernel_dev_t.# (The file itself appeared in 1.3.78, but there it defined __dev_t.)# If it exists, we use it, or, rather, <linux/posix_types.h> which# avoids namespace pollution.  Otherwise we guess that __kernel_dev_t# is an unsigned short (which is true on i386, but false on alpha).# BUG: This test is actually broken if your gcc is not configured to# search /usr/include, as may well happen with cross-compilers.# It would be better to ask $(CC) if these files can be found.if [ -f ${LINUXDIR:-/usr}/include/linux/posix_types.h ]; then   echo '#include <linux/posix_types.h>'   echo '#undef dev_t'   echo '#define dev_t __kernel_dev_t'else   echo '#undef dev_t'   echo '#define dev_t unsigned short'fi# Next we have to find the loop stuff itself.# First try kernel source, then a private version.if [ -f ${LINUXDIR:-/usr}/include/linux/loop.h ]; then   echo '#include <linux/loop.h>'else   echo '#include "real_loop.h"'fiecho '#undef dev_t'