1 files changed, 94 insertions, 0 deletions
diff --git a/20150505/mk/mkopt.sh b/20150505/mk/mkopt.sh
new file mode 100755
index 0000000..38b624e
--- /dev/null
+++ b/20150505/mk/mkopt.sh
@@ -0,0 +1,94 @@
+:
+# $Id: mkopt.sh,v 1.8 2014/11/15 07:07:18 sjg Exp $
+#
+#	@(#) Copyright (c) 2014, Simon J. Gerraty
+#
+#	This file is provided in the hope that it will
+#	be of use.  There is absolutely NO WARRANTY.
+#	Permission to copy, redistribute or otherwise
+#	use this file is hereby granted provided that 
+#	the above copyright notice and this notice are
+#	left intact. 
+#      
+#	Please send copies of changes and bug-fixes to:
+#	sjg@crufty.net
+#
+
+# handle WITH[OUT]_* options in a manner compatible with
+# options.mk and bsd.mkopt.mk in recent FreeBSD
+
+# no need to be included more than once
+_MKOPT_SH=:
+
+#
+# _mk_opt OPT default
+#
+# Set MK_$OPT
+#
+# The semantics are simple, if MK_$OPT has no value
+# WITHOUT_$OPT results in MK_$OPT=no
+# otherwise WITH_$OPT results in MK_$OPT=yes.
+# Note WITHOUT_$OPT overrides WITH_$OPT.
+#
+# For backwards compatability reasons we treat WITH_$OPT=no
+# the same as WITHOUT_$OPT.
+#
+_mk_opt() {
+    _d=$1
+    _mo=MK_$2 _wo=WITHOUT_$2 _wi=WITH_$2
+    eval "_mov=\$$_mo _wov=\$$_wo _wiv=\$$_wi"
+
+    case "$_wiv" in
+    no) _wov=no;;
+    esac
+    _v=${_mov:-${_wov:+no}}
+    _v=${_v:-${_wiv:+yes}}
+    _v=${_v:-$_d}
+    _opt_list="$_opt_list $_mo"
+    case "$_v" in
+    yes|no) ;;			# sane
+    0|[NnFf]*) _v=no;;		# they mean no
+    1|[YyTt]*) _v=yes;;		# they mean yes
+    *) _v=$_d;;			# ignore bogus value
+    esac
+    eval "$_mo=$_v"
+}
+
+#
+# _mk_opts default opt ... [default [opt] ...]
+#
+# see _mk_opts_defaults for example
+#
+_mk_opts() {
+    _d=no
+    for _o in "$@"
+    do
+        case "$_o" in
+	yes|no) _d=$_o; continue;;
+	esac
+	_mk_opt $_d $_o
+    done
+}
+
+_mk_opts_defaults() {
+    _mk_opts no $__DEFAULT_NO_OPTIONS yes $__DEFAULT_YES_OPTIONS
+}
+
+case "/$0" in
+*/mkopt*)
+    _list=no
+    while :
+    do
+	case "$1" in
+	*=*) eval "$1"; shift;;
+	--no|no) _list="$_list no"; shift;;
+	--yes|yes) _list="$_list yes"; shift;;
+	-DWITH*) eval "${1#-D}=1"; shift;;
+	[A-Z]*) _list="$_list $1"; shift;;
+	*) break;;
+	esac
+    done
+    _mk_opts $_list
+    ;;
+esac
+