# ===========================================================================
#             http://autoconf-archive.cryp.to/ac_prompt_user.html
# ===========================================================================
#
# SYNOPSIS
#
#   AC_PROMPT_USER(VARIABLENAME,QUESTION,[DEFAULT])
#
# DESCRIPTION
#
#   Asks a QUESTION and puts the results in VARIABLENAME with an optional
#   DEFAULT value if the user merely hits return. Also calls
#   AC_DEFINE_UNQUOTED() on the VARIABLENAME for VARIABLENAMEs that should
#   be entered into the config.h file as well.
#
# LICENSE
#
#   Copyright (c) 2008 Wes Hardaker <wjhardaker@ucdavis.edu>
#
#   Copying and distribution of this file, with or without modification, are
#   permitted in any medium without royalty provided the copyright notice
#   and this notice are preserved.

AC_DEFUN([AC_PROMPT_USER],
[
MSG_CHECK=`echo "$2" | tail -1`
AC_CACHE_CHECK($MSG_CHECK, ac_cv_user_prompt_$1,
[echo "" >&AC_FD_MSG
AC_PROMPT_USER_NO_DEFINE($1,[$2],$3)
eval ac_cv_user_prompt_$1=\$$1
echo $ac_n "setting $MSG_CHECK to...  $ac_c" >&AC_FD_MSG
])
if test "$ac_cv_user_prompt_$1" != "none"; then
  if test "$4" != ""; then
    AC_DEFINE_UNQUOTED($1,"$ac_cv_user_prompt_$1")
  else
    AC_DEFINE_UNQUOTED($1,$ac_cv_user_prompt_$1)
  fi
fi
]) dnl