src/scripts/Configure-os.h

   1 #! /bin/sh
   2
   3 # Shell script to create a link to the appropriate OS-specific header file.
   4
   5 scripts=../scripts
   6
   7 # Get the OS type, and check that there is a make file for it.
   8
   9 os=`$scripts/os-type -generic` || exit 1
  10
  11 if      test ! -r ../OS/Makefile-$os
  12 then    echo ""
  13         echo "*** Sorry - operating system $os is not supported"
  14         echo "*** See OS/Makefile-* for supported systems" 1>&2
  15         echo ""
  16         exit 1;
  17 fi
  18
  19 # Ensure there is an OS-specific header file, and link it to os.h. There should
  20 # always be one if there is a make file for the OS, so its absence is somewhat
  21 # disastrous.
  22
  23 if      test ! -r ../OS/os.h-$os
  24 then    echo ""
  25         echo "*** Build error: OS/os.h-$os file is missing"
  26         echo ""
  27         exit 1;
  28 fi
  29 rm -f os.h
  30
  31 # In order to accommodate for the fudge below, copy the file instead of
  32 # symlinking it. Otherwise we pollute the clean copy with the fudge.
  33 cp -p ../OS/os.h-$os os.h || exit 1
  34
  35 # Special-purpose fudge for older versions of Linux (pre 2.1.15) that
  36 # use the structure name "options" instead of "ip_options".
  37
  38 if [ "$os" != "Linux" -a "$os" != "Linux-libc5" ] ; then exit 0; fi
  39
  40 grep ip_options /usr/include/linux/ip.h >/dev/null
  41 if [ $? = 0 ] ; then exit 0; fi
  42
  43 cat >>os.h <<End
  44
  45 /* Fudge added because this Linux doesn't appear to have a definition
  46 for ip_options in /usr/include/linux/ip.h. */
  47
  48 #define ip_options options
  49 End
  50
  51 # End of Configure-os.h