1 files changed, 80 insertions, 0 deletions
diff --git a/devel/bmake/files/mk/options.mk b/devel/bmake/files/mk/options.mk
new file mode 100644
index 00000000000..1cc24d65cfc
--- /dev/null
+++ b/devel/bmake/files/mk/options.mk
@@ -0,0 +1,80 @@
+# $Id: options.mk,v 1.1.1.1 2020/05/24 05:35:53 nia Exp $
+#
+#	@(#) Copyright (c) 2012, 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
+#
+
+# Inspired by FreeBSD bsd.own.mk, but intentionally simpler and more flexible.
+
+# Options are normally listed in either OPTIONS_DEFAULT_{YES,NO}
+# We convert these to ${OPTION}/{yes,no} in OPTIONS_DEFAULT_VALUES.
+# We add the OPTIONS_DEFAULT_NO first so they take precedence.
+# This allows override of an OPTIONS_DEFAULT_YES by adding it to
+# OPTIONS_DEFAULT_NO or adding ${OPTION}/no to OPTIONS_DEFAULT_VALUES.
+# An OPTIONS_DEFAULT_NO option can only be overridden by putting
+# ${OPTION}/yes in OPTIONS_DEFAULT_VALUES.
+# A makefile may set NO_* (or NO*) to indicate it cannot do something.
+# User sets WITH_* and WITHOUT_* to indicate what they want.
+# We set ${OPTION_PREFIX:UMK_}* which is then all we need care about.
+OPTIONS_DEFAULT_VALUES += \
+	${OPTIONS_DEFAULT_NO:O:u:S,$,/no,} \
+	${OPTIONS_DEFAULT_YES:O:u:S,$,/yes,}
+
+OPTION_PREFIX ?= MK_
+
+# NO_* takes precedence
+# If both WITH_* and WITHOUT_* are defined, WITHOUT_ wins unless
+# DOMINANT_* is set to "yes"
+# Otherwise WITH_* and WITHOUT_* override the default.
+.for o in ${OPTIONS_DEFAULT_VALUES:M*/*}
+.if defined(NO_${o:H}) || defined(NO${o:H})
+# we cannot do it
+${OPTION_PREFIX}${o:H} ?= no
+.elif defined(WITH_${o:H}) && defined(WITHOUT_${o:H})
+# normally WITHOUT_ wins
+DOMINANT_${o:H} ?= no
+${OPTION_PREFIX}${o:H} ?= ${DOMINANT_${o:H}}
+.elif ${o:T:tl} == "no"
+.if defined(WITH_${o:H})
+${OPTION_PREFIX}${o:H} ?= yes
+.else
+${OPTION_PREFIX}${o:H} ?= no
+.endif
+.else
+.if defined(WITHOUT_${o:H})
+${OPTION_PREFIX}${o:H} ?= no
+.else
+${OPTION_PREFIX}${o:H} ?= yes
+.endif
+.endif
+.endfor
+
+# OPTIONS_DEFAULT_DEPENDENT += FOO_UTILS/FOO
+# If neither WITH[OUT]_FOO_UTILS is set, (see rules above)
+# use the value of ${OPTION_PREFIX}FOO
+.for o in ${OPTIONS_DEFAULT_DEPENDENT:M*/*:O:u}
+.if defined(NO_${o:H}) || defined(NO${o:H})
+# we cannot do it
+${OPTION_PREFIX}${o:H} ?= no
+.elif defined(WITH_${o:H}) && defined(WITHOUT_${o:H})
+# normally WITHOUT_ wins
+DOMINANT_${o:H} ?= no
+${OPTION_PREFIX}${o:H} ?= ${DOMINANT_${o:H}}
+.elif defined(WITH_${o:H})
+${OPTION_PREFIX}${o:H} ?= yes
+.elif defined(WITHOUT_${o:H})
+${OPTION_PREFIX}${o:H} ?= no
+.else
+${OPTION_PREFIX}${o:H} ?= ${${OPTION_PREFIX}${o:T}}
+.endif
+.endfor
+.undef OPTIONS_DEFAULT_VALUES OPTIONS_DEFAULT_NO OPTIONS_DEFAULT_YES