build.sh: add show-params operation

Add show-params operation to the makefile target, and reword
params operation to describe what it's done since 2012.

(In 2012-11-04 the Makefile's previous params target was renamed
to show-params and a new params target was added to save a 'params'
file, and build.sh wasn't adapted.)

Author: lukem

Makefile

@@ -1,4 +1,4 @@
-#	$NetBSD: Makefile,v 1.335 2022/08/21 07:10:03 lukem Exp $
+#	$NetBSD: Makefile,v 1.336 2023/06/02 20:48:09 lukem Exp $
 
 #
 # This is the top-level makefile for building NetBSD. For an outline of
@@ -88,8 +88,8 @@
 #   do-top-obj:      creates the top level object directory.
 #   do-tools-obj:    creates object directories for the host toolchain.
 #   do-tools:        builds host toolchain.
-#   params:          record the values of variables that might affect the
-#                    build.
+#   params:          create params file with various make(1) parameters.
+#   show-params:     show various make(1) parameters.
 #   obj:             creates object directories.
 #   do-distrib-dirs: creates the distribution directories.
 #   includes:        installs include files.

build.sh

@@ -1,5 +1,5 @@
 #! /usr/bin/env sh
-#	$NetBSD: build.sh,v 1.370 2023/06/02 14:29:11 lukem Exp $
+#	$NetBSD: build.sh,v 1.371 2023/06/02 20:48:09 lukem Exp $
 #
 # Copyright (c) 2001-2023 The NetBSD Foundation, Inc.
 # All rights reserved.
@@ -563,6 +563,7 @@ level of source directory"
 	do_install_image=false
 	do_disk_image=false
 	do_params=false
+	do_show_params=false
 	do_rump=false
 	do_dtb=false
 
@@ -1084,7 +1085,8 @@ help()
                         RELEASEDIR/RELEASEMACHINEDIR/installation/installimage.
     disk-image=TARGET   Create bootable disk image in
                         RELEASEDIR/RELEASEMACHINEDIR/binary/gzimg/TARGET.img.gz.
-    params              Show various make(1) parameters.
+    params              Create params file with various make(1) parameters.
+    show-params         Show various make(1) parameters.
     list-arch           Show a list of valid MACHINE/MACHINE_ARCH values,
                         and exit.  The list may be narrowed by passing glob
                         patterns or exact values in MACHINE or MACHINE_ARCH.
@@ -1461,6 +1463,7 @@ parseoptions()
 		rump|\
 		rumptest|\
 		sets|\
+		show-params|\
 		sourcesets|\
 		syspkgs|\
 		tools)
@@ -2013,7 +2016,7 @@ createmakewrapper()
 	eval cat <<EOF ${makewrapout}
 #! ${HOST_SH}
 # Set proper variables to allow easy "make" building of a NetBSD subtree.
-# Generated from:  \$NetBSD: build.sh,v 1.370 2023/06/02 14:29:11 lukem Exp $
+# Generated from:  \$NetBSD: build.sh,v 1.371 2023/06/02 20:48:09 lukem Exp $
 # with these arguments: ${_args}
 #
 
@@ -2485,7 +2488,7 @@ main()
 			statusmsg "Successful make ${op}"
 			;;
 
-		cleandir|obj|sourcesets|syspkgs|params)
+		cleandir|obj|sourcesets|syspkgs|params|show-params)
 			${runcmd} "${makewrapper}" ${parallel} ${op} ||
 			    bomb "Failed to make ${op}"
 			statusmsg "Successful make ${op}"