Macro: ac_prompt_user

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# ac_prompt_user

## Synopsis

`AC_PROMPT_USER(VARIABLENAME,QUESTION,[DEFAULT])`

## Version

1.1.1.1 (2001/07/26) Miscellaneous @ ac-archive-0.5.32

## Author

Wes Hardaker <wjhardaker@ucdavis.edu>

## 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.

## M4 Source Code

    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