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From: jason.wessel@windriver.com
To: linux-kernel@vger.kernel.org
Cc: Jason Wessel <jason.wessel@windriver.com>,
	Ingo Molnar <mingo@elte.hu>, Thomas Gleixner <tglx@linutronix.de>
Subject: [PATCH 4/8] kgdb: COPTIMIZE flag
Date: Sat,  9 Feb 2008 07:35:10 -0600	[thread overview]
Message-ID: <1202564114-18587-5-git-send-email-jason.wessel@windriver.com> (raw)
In-Reply-To: <1202564114-18587-4-git-send-email-jason.wessel@windriver.com>

From: Jason Wessel <jason.wessel@windriver.com>

This patch adds in the ability to unoptimize a single kernel module to
make source stepping more linear and not optimize out variables that
the developer might like to inspect.  It used with adding
COPTIMIZE=-O0 to the build line when doing something like a single
kernel module only build.  Or you could use it to override the default
optimization level entirely.

Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
 Makefile |    8 ++++++--
 1 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/Makefile b/Makefile
index 89f2d8b..65aa7f8 100644
--- a/Makefile
+++ b/Makefile
@@ -502,10 +502,14 @@ endif # $(dot-config)
 all: vmlinux
 
 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
-KBUILD_CFLAGS	+= -Os
+COPTIMIZE	+= -Os
 else
-KBUILD_CFLAGS	+= -O2
+COPTIMIZE	+= -O2
 endif
+# COPTIMIZE may be overridden on the make command line with
+# 	make ... COPTIMIZE=""
+# The resulting object may be easier to debug with KGDB
+KBUILD_CFLAGS	+= $(COPTIMIZE)
 
 include $(srctree)/arch/$(SRCARCH)/Makefile
 
-- 
1.5.4


  reply	other threads:[~2008-02-09 13:37 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-02-09 13:35 [PATCH 0/8] kgdb 2.6.25 version jason.wessel
2008-02-09 13:35 ` [PATCH 1/8] kgdb: core API and gdb protocol handler jason.wessel
2008-02-09 13:35   ` [PATCH 2/8] pid, kgdb: add pid_max prototype jason.wessel
2008-02-09 13:35     ` [PATCH 3/8] kgdb, modules: Always allow module sect info for KGDB jason.wessel
2008-02-09 13:35       ` jason.wessel [this message]
2008-02-09 13:35         ` [PATCH 5/8] kgdb, x86: Add arch specfic kgdb support jason.wessel
2008-02-09 13:35           ` [PATCH 6/8] kgdb, sysrq_bugfix jason.wessel
2008-02-09 13:35             ` [PATCH][7/8] kgdb: exclusive use kgdb8250 uart I/O driver jason.wessel
2008-02-09 13:35               ` [PATCH 8/8] kgdb: kgdboc 8250 I/O module jason.wessel
2008-02-09 14:53               ` [PATCH][7/8] kgdb: exclusive use kgdb8250 uart I/O driver Jan Kiszka
2008-02-09 18:45                 ` Jason Wessel
2008-02-09 16:40               ` Jan Kiszka
2008-02-09 18:41                 ` Jason Wessel
2008-02-10 15:26               ` Pavel Machek
2008-02-09 14:33           ` [PATCH 5/8] kgdb, x86: Add arch specfic kgdb support Jan Kiszka
2008-02-09 17:16         ` [PATCH 4/8] kgdb: COPTIMIZE flag Christoph Hellwig
2008-02-09 17:15       ` [PATCH 3/8] kgdb, modules: Always allow module sect info for KGDB Christoph Hellwig
2008-02-09 17:10     ` [PATCH 2/8] pid, kgdb: add pid_max prototype Christoph Hellwig
2008-02-09 14:27   ` [PATCH 1/8] kgdb: core API and gdb protocol handler Jan Kiszka
2008-02-09 15:29   ` Sam Ravnborg
2008-02-09 17:27   ` Christoph Hellwig
2008-02-09 19:46     ` Ray Lee
2008-02-09 21:51       ` Ray Lee
2008-02-09 17:38 ` [PATCH 0/8] kgdb 2.6.25 version Christoph Hellwig

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