support/rlvers.sh

   1 #! /bin/sh
   2 #
   3 # rlvers.sh -- run a program that prints out the readline version number
   4 #              using locally-installed readline libraries
   5 #
   6
   7 PROGNAME=`basename $0`
   8 TDIR=/tmp/rlvers
   9
  10 # defaults
  11 CC=cc
  12 RL_LIBDIR=/usr/local/lib
  13
  14 TERMCAP_LIB="-ltermcap"
  15
  16 while [ $# -gt 0 ]; do
  17         case "$1" in
  18         -C)     shift ; CC="$1"; shift ;;
  19         -L)     shift ; RL_LIBDIR="$1" ; shift ;;
  20         -T)     shift ; TERMCAP_LIB="$1" ; shift ;;
  21         -v)     shift ; verbose=y ;;
  22         --)     shift ; break ;;
  23         *)      echo "${PROGNAME}: usage: $PROGNAME [-C compiler] [-L libdir] [-v]" >&2 ; exit 2;;
  24         esac
  25 done
  26
  27 # if someone happened to install examples/rlversion, use it (it's not
  28 # installed by default)
  29 if test -f ${RL_LIBDIR}/rlversion ; then
  30         if [ -n "$verbose" ]; then
  31                 echo "${PROGNAME}: using installed rlversion from ${RL_LIBDIR}/rlversion"
  32         fi
  33         v=`${RL_LIBDIR}/rlversion 2>/dev/null`
  34         case "$v" in
  35         unknown | "")   echo 0 ;;
  36         *)              echo "$v" ;;
  37         esac
  38         exit 0
  39 fi
  40
  41 if [ -n "$verbose" ]; then
  42         echo "${PROGNAME}: using ${RL_LIBDIR} to find libreadline"
  43         echo "${PROGNAME}: attempting program compilation"
  44 fi
  45
  46 # make $TDIR mode 0700
  47 mkdir $TDIR || {
  48         echo "${PROGNAME}: ${TDIR}: file exists" >&2
  49         echo 0
  50         exit 1
  51 }
  52 chmod 700 $TDIR
  53
  54 trap 'rm -f $TDIR/rlvers $TDIR/rlvers.? ; rmdir $TDIR' 0 1 2 3 6 15
  55
  56 cat > $TDIR/rlvers.c << EOF
  57 #include <stdio.h>
  58 extern char *rl_library_version;
  59
  60 main()
  61 {
  62         printf("%s\n", rl_library_version ? rl_library_version : "0");
  63         exit(0);
  64 }
  65 EOF
  66
  67 if eval ${CC} -L${RL_LIBDIR} -o $TDIR/rlvers $TDIR/rlvers.c -lreadline ${TERMCAP_LIB};
  68 then
  69         v=`$TDIR/rlvers`
  70 else
  71         if [ -n "$verbose" ] ; then
  72                 echo "${PROGNAME}: compilation failed: status $?"
  73                 echo "${PROGNAME}: using version 0"
  74         fi
  75         v=0
  76 fi
  77
  78 case "$v" in
  79 unknown | "")   echo 0 ;;
  80 *)              echo "$v" ;;
  81 esac
  82
  83 exit 0