src/scripts/Configure-os.h

   1 #! /bin/sh
   2 # $Cambridge: exim/src/scripts/Configure-os.h,v 1.3 2008/04/13 09:22:45 tom Exp $
   3
   4 # Shell script to create a link to the appropriate OS-specific header file.
   5
   6 scripts=../scripts
   7
   8 # Get the OS type, and check that there is a make file for it.
   9
  10 os=`$scripts/os-type -generic` || exit 1
  11
  12 if      test ! -r ../OS/Makefile-$os
  13 then    echo ""
  14         echo "*** Sorry - operating system $os is not supported"
  15         echo "*** See OS/Makefile-* for supported systems" 1>&2
  16         echo ""
  17         exit 1;
  18 fi
  19
  20 # Ensure there is an OS-specific header file, and link it to os.h. There should
  21 # always be one if there is a make file for the OS, so its absence is somewhat
  22 # disastrous.
  23
  24 if      test ! -r ../OS/os.h-$os
  25 then    echo ""
  26         echo "*** Build error: OS/os.h-$os file is missing"
  27         echo ""
  28         exit 1;
  29 fi
  30 rm -f os.h
  31
  32 # In order to accomodate for the fudge below, copy the file instead of
  33 # symlinking it. Otherwise we pollute the clean copy with the fudge.
  34 cp -p ../OS/os.h-$os os.h || exit 1
  35
  36 # Special-purpose fudge for older versions of Linux (pre 2.1.15) that
  37 # use the structure name "options" instead of "ip_options".
  38
  39 if [ "$os" != "Linux" -a "$os" != "Linux-libc5" ] ; then exit 0; fi
  40
  41 grep ip_options /usr/include/linux/ip.h >/dev/null
  42 if [ $? = 0 ] ; then exit 0; fi
  43
  44 cat >>os.h <<End
  45
  46 /* Fudge added because this Linux doesn't appear to have a definition
  47 for ip_options in /usr/include/linux/ip.h. */
  48
  49 #define ip_options options
  50 End
  51
  52 # End of Configure-os.h