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dnl $Id: argenable.m4,v 1.1 2004-08-24 18:40:21 rjkaes Exp $
dnl
dnl Define a new AC_ARG_ENABLE like macro which handles invalid inputs
dnl correctly. The macro takes three arguments:
dnl 1) the option name (used like --enable-option)
dnl 2) the help string
dnl 3) the default value (either yes or no)
dnl
dnl This macro also defines on variable in the form "option_enabled"
dnl set to either "yes" or "no".
dnl
AC_DEFUN(TP_ARG_ENABLE,
[AC_ARG_ENABLE([$1],
AS_HELP_STRING([--enable-$1], [$2]),
[case "${enableval}" in
yes) $1_enabled=yes ;;
no) $1_enabled=no ;;
*) AC_MSG_ERROR([bad value ${enableval} for --enable-$1]) ;;
esac],[$1_enabled=$3])])
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