[src/trunk]: src As discussed on tech-toolchain, offer a new make variable MK...

[martin <martin%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/397f01395dc7
branches:  trunk
changeset: 795843:397f01395dc7
user:      martin <martin%NetBSD.org@localhost>
date:      Mon May 05 19:06:29 2014 +0000

description:
As discussed on tech-toolchain, offer a new make variable MKKDEBUG - if
set to "yes", kernel builds will gain debug info and a netbsd.gdb will
be created (same as adding "makeoptions DEBUG=-g" to the config file).

diffstat:

 share/mk/bsd.README        |  6 +++++-
 sys/conf/Makefile.kern.inc |  7 ++++++-
 2 files changed, 11 insertions(+), 2 deletions(-)

diffs (41 lines):

diff -r 4957f0dc9041 -r 397f01395dc7 share/mk/bsd.README
--- a/share/mk/bsd.README       Mon May 05 19:04:47 2014 +0000
+++ b/share/mk/bsd.README       Mon May 05 19:06:29 2014 +0000
@@ -1,4 +1,4 @@
-#      $NetBSD: bsd.README,v 1.330 2014/04/18 00:37:46 christos Exp $
+#      $NetBSD: bsd.README,v 1.331 2014/05/05 19:06:29 martin Exp $
 #      @(#)bsd.README  8.2 (Berkeley) 4/2/94
 
 This is the README file for the make "include" files for the NetBSD
@@ -234,6 +234,10 @@
                (depends on libpthread.)
                Default: yes
 
+MKKDEBUG       If "yes", force building of kernel symbol info and creation
+               of netbsd.gdb in all kernel builds, independently of the
+               settings for "makeoptions DEBUG" in the kernel config file.
+
 MKKERBEROS     If "no", disables building of Kerberos v5
                infrastructure (libraries and support programs).
                Default: yes
diff -r 4957f0dc9041 -r 397f01395dc7 sys/conf/Makefile.kern.inc
--- a/sys/conf/Makefile.kern.inc        Mon May 05 19:04:47 2014 +0000
+++ b/sys/conf/Makefile.kern.inc        Mon May 05 19:06:29 2014 +0000
@@ -1,4 +1,4 @@
-#      $NetBSD: Makefile.kern.inc,v 1.167 2014/03/10 02:36:50 ozaki-r Exp $
+#      $NetBSD: Makefile.kern.inc,v 1.168 2014/05/05 19:06:29 martin Exp $
 #
 # This file contains common `MI' targets and definitions and it is included
 # at the bottom of each `MD' ${MACHINE}/conf/Makefile.${MACHINE}.
@@ -17,6 +17,11 @@
 #
 # all ports are expected to include bsd.own.mk for toolchain settings
 
+# Default DEBUG to -g if kernel debug info is requested by MKKDEBUG=yes
+.if defined(MKKDEBUG) && ${MKKDEBUG} == "yes"
+DEBUG?=-g
+.endif
+
 ##
 ## (0) toolchain settings for things that aren't part of the standard
 ## toolchain