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
   9 : ${TMPDIR:=/tmp}
  10 TDIR=$TMPDIR/rlvers
  11
  12 # defaults
  13 CC=cc
  14 RL_LIBDIR=/usr/local/lib
  15 RL_INCDIR=/usr/local/include
  16
  17 TERMCAP_LIB="-ltermcap"
  18
  19 # cannot rely on the presence of getopts
  20 while [ $# -gt 0 ]; do
  21         case "$1" in
  22         -C)     shift ; CC="$1"; shift ;;
  23         -I)     shift ; RL_INCDIR="$1" ; shift ;;
  24         -L)     shift ; RL_LIBDIR="$1" ; shift ;;
  25         -T)     shift ; TERMCAP_LIB="$1" ; shift ;;
  26         -v)     shift ; verbose=y ;;
  27         --)     shift ; break ;;
  28         *)      echo "${PROGNAME}: usage: $PROGNAME [-C compiler] [-L libdir] [-v]" >&2 ; exit 2;;
  29         esac
  30 done
  31
  32 # if someone happened to install examples/rlversion, use it (it's not
  33 # installed by default)
  34 if test -f ${RL_LIBDIR}/rlversion ; then
  35         if [ -n "$verbose" ]; then
  36                 echo "${PROGNAME}: using installed rlversion from ${RL_LIBDIR}/rlversion"
  37         fi
  38         v=`${RL_LIBDIR}/rlversion 2>/dev/null`
  39         case "$v" in
  40         unknown | "")   echo 0 ;;
  41         *)              echo "$v" ;;
  42         esac
  43         exit 0
  44 fi
  45
  46 if [ -n "$verbose" ]; then
  47         echo "${PROGNAME}: using ${RL_LIBDIR} to find libreadline"
  48         echo "${PROGNAME}: attempting program compilation"
  49 fi
  50
  51 # make $TDIR mode 0700
  52 mkdir $TDIR || {
  53         echo "${PROGNAME}: ${TDIR}: file exists" >&2
  54         echo 0
  55         exit 1
  56 }
  57 chmod 700 $TDIR
  58
  59 trap 'rm -f $TDIR/rlvers $TDIR/rlvers.? ; rmdir $TDIR' 0 1 2 3 6 15
  60
  61 cat > $TDIR/rlvers.c << EOF
  62 #include <stdio.h>
  63 extern char *rl_library_version;
  64
  65 main()
  66 {
  67         printf("%s\n", rl_library_version ? rl_library_version : "0");
  68         exit(0);
  69 }
  70 EOF
  71
  72 opwd=`pwd`
  73
  74 cd $TDIR || {
  75         echo "${PROGNAME}: cannot cd to $TDIR" >&2
  76         echo 0
  77         exit 1
  78 }
  79
  80 if eval ${CC} -L${RL_LIBDIR} -I${RL_INCDIR} -o $TDIR/rlvers $TDIR/rlvers.c -lreadline ${TERMCAP_LIB};
  81 then
  82         v=`$TDIR/rlvers`
  83 else
  84         if [ -n "$verbose" ] ; then
  85                 echo "${PROGNAME}: compilation failed: status $?"
  86                 echo "${PROGNAME}: using version 0"
  87         fi
  88         v=0
  89 fi
  90
  91 case "$v" in
  92 unknown | "")   echo 0 ;;
  93 *)              echo "$v" ;;
  94 esac
  95
  96 cd $opwd
  97 exit 0