1 files changed, 67 insertions, 0 deletions
diff --git a/mk/misc/show.mk b/mk/misc/show.mk
new file mode 100644
index 00000000000..cbe21c0ea07
--- /dev/null
+++ b/mk/misc/show.mk
@@ -0,0 +1,67 @@
+# $NetBSD: show.mk,v 1.1 2007/01/02 21:29:07 rillig Exp $
+#
+# This file contains some targets that print information gathered from
+# variables. They do not modify any variables.
+#
+
+# show-tools:
+#	Emits a /bin/sh shell script that defines all known tools
+#	to the values they have in the pkgsrc infrastructure.
+#
+show-tools: .PHONY
+.for t in ${_USE_TOOLS}
+.  if defined(_TOOLS_VARNAME.${t})
+	@${ECHO} ${_TOOLS_VARNAME.${t}:Q}=${${_TOOLS_VARNAME.${t}}:Q:Q}
+.  endif
+.endfor
+
+# show-build-defs:
+#	Prints the variables that can be configured by the pkgsrc user
+#	in mk.conf, and the effects that those settings have.
+#
+
+BUILD_DEFS?=		# none
+BUILD_DEFS_EFFECTS?=	# none
+
+.if !empty(PKGSRC_SHOW_BUILD_DEFS:M[yY][eE][sS])
+pre-depends-hook: show-build-defs
+.endif
+
+show-build-defs: .PHONY
+.if !empty(BUILD_DEFS:M*)
+	@${ECHO} "=========================================================================="
+	@${ECHO} "The following variables will affect the build process of this package,"
+	@${ECHO} "${PKGNAME}.  Their current value is shown below:"
+	@${ECHO} ""
+.  for var in ${BUILD_DEFS:O}
+.    if !defined(${var})
+	@${ECHO} "        * ${var} (not defined)"
+.    elif defined(${var}) && empty(${var})
+	@${ECHO} "        * ${var} (defined)"
+.    else
+	@${ECHO} "        * ${var} = "${${var}:Q}
+.    endif
+.  endfor
+.  if !empty(BUILD_DEFS_EFFECTS:M*)
+	@${ECHO} ""
+	@${ECHO} "Based on these variables, the following variables have been set:"
+	@${ECHO} ""
+.  endif
+.  for var in ${BUILD_DEFS_EFFECTS:O}
+.    if !defined(${var})
+	@${ECHO} "        * ${var} (not defined)"
+.    elif defined(${var}) && empty(${var})
+	@${ECHO} "        * ${var} (defined, but empty)"
+.    else
+	@${ECHO} "        * ${var} = "${${var}:Q}
+.    endif
+.  endfor
+	@${ECHO} ""
+	@${ECHO} "You may want to abort the process now with CTRL-C and change their value"
+	@${ECHO} "before continuing.  Be sure to run \`${MAKE} clean' after"
+	@${ECHO} "the changes."
+	@${ECHO} "=========================================================================="
+.endif
+
+# @deprecated -- remove after 2007Q1
+build-defs-message: show-build-defs .PHONY