m4/ac_prompt_user.m4

dnl @synopsis AC_PROMPT_USER_NO_DEFINE(VARIABLENAME,QUESTION,[DEFAULT])
dnl
dnl Asks a QUESTION and puts the results in VARIABLENAME with an optional
dnl DEFAULT value if the user merely hits return.
dnl
dnl @version 1.15
dnl @author Wes Hardaker <hardaker@users.sourceforge.net>
dnl
AC_DEFUN([AC_PROMPT_USER_NO_DEFINE],
[
if test "x$defaults" = "xno"; then
echo $ECHO_N "$2 ($3): $ECHO_C"
read tmpinput <&AS_ORIGINAL_STDIN_FD
if test "$tmpinput" = "" -a "$3" != ""; then
  tmpinput="$3"
fi
eval $1=\"$tmpinput\"
else
tmpinput="$3"
eval $1=\"$tmpinput\"
fi
]) dnl done AC_PROMPT_USER

dnl @synopsis AC_PROMPT_USER(VARIABLENAME,QUESTION,[DEFAULT],QUOTED)
dnl
dnl Asks a QUESTION and puts the results in VARIABLENAME with an optional
dnl DEFAULT value if the user merely hits return.  Also calls
dnl AC_DEFINE_UNQUOTED() on the VARIABLENAME for VARIABLENAMEs that should
dnl be entered into the config.h file as well.  If QUOTED is "quoted" then
dnl the result will be defined within quotes.
dnl
dnl @version 1.15
dnl @author Wes Hardaker <hardaker@users.sourceforge.net>
dnl
AC_DEFUN([AC_PROMPT_USER],
[
MSG_CHECK="patsubst([$2], [.*
], [])"
AC_CACHE_CHECK($MSG_CHECK, ac_cv_user_prompt_$1,
[echo "" >&AS_MESSAGE_FD
AC_PROMPT_USER_NO_DEFINE($1,[$2],$3)
eval ac_cv_user_prompt_$1=\$$1
echo $ECHO_N "setting $MSG_CHECK to...  $ECHO_C" >&AS_MESSAGE_FD
])
if test "$ac_cv_user_prompt_$1" != "none"; then
  if test "x$4" = "xquoted" -o "x$4" = "xQUOTED"; then
    AC_DEFINE_UNQUOTED($1,"$ac_cv_user_prompt_$1")
  else
    AC_DEFINE_UNQUOTED($1,$ac_cv_user_prompt_$1)
  fi
fi
]) dnl