Re: syntax error...

[Paul Eggert]

Vivek H <address@hidden> writes:

> I have already installed autoconf-2.10 successfully. when I am trying to 
> install autoconf-2.50 by using sh ./configure I got list of error message on 
> my terminal as below
>  
> :command not found
> ./configure: line 16: syntax error near unexpected token 'elif'
> ./configure:line16:'elif test -n "${BASH_VERSION->set}" && (set -o posix) 
> >/dev/null 2>&1;then

It sounds like your shell is confused, either by this line (line 15):

  NULLCMD=:

or by this one (line 16):

  elif test -n "${BASH_VERSION+set}" && (set -o posix) >/dev/null 2>&1; then

What shell are you using?  What operating system are you running it on?
What happens when you try to run this command with your shell?

  NULLCMD=:

What happens when you try to run this command?

  if false; then
    echo 1
  elif true; then
    echo 2
  fi