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#! /bin/sh
# Shell script to create a link to the appropriate OS-specific header file.
scripts=../scripts
# Get the OS type, and check that there is a make file for it.
os=`$scripts/os-type -generic` || exit 1
if test ! -r ../OS/Makefile-$os
then echo ""
echo "*** Sorry - operating system $os is not supported"
echo "*** See OS/Makefile-* for supported systems" 1>&2
echo ""
exit 1;
fi
# Ensure there is an OS-specific header file, and link it to os.h. There should
# always be one if there is a make file for the OS, so its absence is somewhat
# disastrous.
if test ! -r ../OS/os.h-$os
then echo ""
echo "*** Build error: OS/os.h-$os file is missing"
echo ""
exit 1;
fi
rm -f os.h
# In order to accomodate for the fudge below, copy the file instead of
# symlinking it. Otherwise we pollute the clean copy with the fudge.
cp -p ../OS/os.h-$os os.h || exit 1
# Special-purpose fudge for older versions of Linux (pre 2.1.15) that
# use the structure name "options" instead of "ip_options".
if [ "$os" != "Linux" -a "$os" != "Linux-libc5" ] ; then exit 0; fi
grep ip_options /usr/include/linux/ip.h >/dev/null
if [ $? = 0 ] ; then exit 0; fi
cat >>os.h <<End
/* Fudge added because this Linux doesn't appear to have a definition
for ip_options in /usr/include/linux/ip.h. */
#define ip_options options
End
# End of Configure-os.h
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