1.5.22 fails to configure on AIX 5.1

[Howard Chu]

Something in AIX's /bin/sh is misbehaving; the output from setting -xv 
on the shell shows chunks of the script are actually missing. If bash is 
used to invoke the top-level configure script, that seems to run OK but 
then the libltdl directory also fails unless you set CONFIG_SHELL to 
bash as well. (In other words, using bash exclusively seems to work.)

I guess the first noticable failure is in trying to detect the maximum 
length of a command line:

+ echo 'configure:5515: checking the maximum length of command line 
arguments'
+ echo -n 'checking the maximum length of command line arguments... '
checking the maximum length of command line arguments... if test 
"${lt_cv_sys_ma
x_cmd_len+set}" = set; then
  echo $ECHO_N "(cached) $ECHO_C" >&6
else
    i=0
  teststring="ABCD"
[I've omitted the rest of the script body here]
  *)
    # If test is not a shell built-in, we'll probably end up computing a
    # maximum length that is only half of the actual maximum length, but
    # we can't tell.
    SHELL=${SHELL-${CONFIG_SHELL-/bin/sh}}
    while (test "X"`$SHELL $0 --fallback-echo "X$teststring" 2>/dev/null` \
               = "XX$teststring") >/dev/null 2>&1 &&
            new_result=`expr "X$teststring" : ".*" 2>&1` &&
            lt_cv_sys_max_cmd_len=$new_result &&
            test $i != 17 # 1/2 MB should be enough
    do
      i=`expr $i + 1`
      teststring=$teststring$teststring
    done
    teststring=
    # Add a significant safety factor because C++ compilers can tack on 
massive
    # amounts of additional arguments before passing them to the linker.
    # It appears as though 1/2 is a usable value.
    lt_cv_sys_max_cmd_len=`expr $lt_cv_sys_max_cmd_len \/ 2`
    ;;
  esac

fi
+ test '' = set
+ i=0
+ teststring=ABCD
+ case $build_os in
+ SHELL=/bin/sh
+ teststring=
expr $lt_cv_sys_max_cmd_len \/ 2
++ expr / 2
expr: syntax error
+ lt_cv_sys_max_cmd_len=


It appears to completely ignore the "while" clause.


--
  -- Howard Chu
  Chief Architect, Symas Corp.  http://www.symas.com
  Director, Highland Sun        http://highlandsun.com/hyc
  OpenLDAP Core Team            http://www.openldap.org/project/