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Date: Mon, 14 Mar 2016 22:02:47 +0100
From: Emese Revfy <re.emese@...il.com>
To: Masahiro Yamada <yamada.masahiro@...ionext.com>
Cc: Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
pageexec@...email.hu, spender@...ecurity.net,
kernel-hardening@...ts.openwall.com, Michal Marek <mmarek@...e.com>, Kees
Cook <keescook@...omium.org>, Rasmus Villemoes <linux@...musvillemoes.dk>,
fengguang.wu@...el.com, Dmitry Vyukov <dvyukov@...gle.com>, Linux Kernel
Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v5 3/5] Add Cyclomatic complexity GCC plugin
On Fri, 11 Mar 2016 15:26:39 +0900
Masahiro Yamada <yamada.masahiro@...ionext.com> wrote:
> > diff --git a/scripts/Makefile.gcc-plugins b/scripts/Makefile.gcc-plugins
> > index 7c85bf2..dd7b56d 100644
> > --- a/scripts/Makefile.gcc-plugins
> > +++ b/scripts/Makefile.gcc-plugins
> > @@ -5,7 +5,11 @@ else
> > PLUGINCC := $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-plugin.sh "$(HOSTCC)" "$(HOSTCXX)" "$(CC)")
> > endif
> > ifneq ($(PLUGINCC),)
> > -export PLUGINCC GCC_PLUGINS_CFLAGS GCC_PLUGINS_AFLAGS
> > +ifdef CONFIG_GCC_PLUGIN_CYC_COMPLEXITY
> > +GCC_PLUGIN_CYC_COMPLEXITY_CFLAGS := -fplugin=$(objtree)/tools/gcc/cyc_complexity_plugin.so
> > +endif
> > +GCC_PLUGINS_CFLAGS := $(GCC_PLUGIN_CYC_COMPLEXITY_CFLAGS)
> > +export PLUGINCC GCC_PLUGINS_CFLAGS GCC_PLUGINS_AFLAGS GCC_PLUGIN_CYC_COMPLEXITY
>
>
> Do you need to export "GCC_PLUGIN_CYC_COMPLEXITY"?
> I do not see any reference to it.
This is a demo plugin. I just want to demonstrate how to use this infrastructure but I can remove it.
In my project there would be other plugins which use the export.
> If we expect more and more plugins in the future,
> is it better to do like this?
>
> gcc-plugin-$(CONFIG_GCC_PLUGIN_CYC_COMPLEXITY) += cyc_complexity_plugin.so
> gcc-plugin-$(CONFIG_GCC_PLUGIN_SANCOV) += sancov_plugin.so
> gcc-plugin-$(CONFIG_GCC_PLUGIN_FOO) += foo_plugin.so
>
>
> GCC_PLUGINS_CFLAGS := $(addprefix -fplugin=$(objtree)/tools/gcc/,
> $(gcc-plugin-y))
Yes, it is better, I will do it.
--
Emese
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