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Date: Sat, 4 Sep 2010 17:17:27 +0800 From: Hui Zhu <teawater@...il.com> To: Steven <mqyoung@...il.com> Cc: "gdb@...rceware.org" <gdb@...rceware.org>, linux-kernel@...r.kernel.org, Michael Snyder <msnyder@...are.com>, Marc Khouzam <marc.khouzam@...csson.com>, Thiago Jung Bauermann <thiago.bauermann@...il.com>, "Frank Ch. Eigler" <fche@...hat.com> Subject: Re: Linux Kernel GDB tracepoint module 2010-8-30 release On Sat, Sep 4, 2010 at 16:56, Steven <mqyoung@...il.com> wrote: > On Sat, 2010-09-04 at 11:41 +0800, Hui Zhu wrote: >> BTW, looks GCC and GDB don't want handle the optimization debug >> trouble (all they want is rewrite the GCC in C++ :P). >> So I think make linux kernel can close optimization is better idea, do >> you know some way or some patch to do it? >> > > Just disable CONFIG_CC_OPTIMIZE_FOR_SIZE and modify the Makefile of > kernel: > KBUILD_CFLAGS += -O2 > to > KBUILD_CFLAGS += -O0 Cool, :) I try just change the compile option of readdir.c to without -O2, it works OK. I think maybe it's a GDB bug too. Could you try the second issue with gdb 7.2? BTW, I think I need add some words let all the KGTP user use gdb 7.2 with KGTP in howto. :) Thanks for help me with this big issue. :) Best, Hui > > Sometime gcc will still optimize out some variables even I compile a > program with -O0, so volatile is required sometimes. > > Thanks, > Steven > > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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