linux-kernel - Re: [PATCH v7 1/6] Shared library support

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Message-Id: <20160503232932.706dd3bb081df5d04a390de9@gmail.com>
Date:	Tue, 3 May 2016 23:29:32 +0200
From:	Emese Revfy <re.emese@...il.com>
To:	Masahiro Yamada <yamada.masahiro@...ionext.com>
Cc:	Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
	PaX Team <pageexec@...email.hu>,
	Brad Spengler <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 <fengguang.wu@...el.com>,
	Dmitry Vyukov <dvyukov@...gle.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	David Brown <david.brown@...aro.org>
Subject: Re: [PATCH v7 1/6] Shared library support

On Tue, 3 May 2016 11:00:56 +0900
Masahiro Yamada <yamada.masahiro@...ionext.com> wrote:

Hi,

> # Compile .c file, create position independent .o file
> # host-cxxshobjs -> .o
> quiet_cmd_host-cxxshobjs = HOSTCXX -fPIC $@
>       cmd_host-cxxshobjs = $(HOSTCXX) $(hostcxx_flags) -fPIC -c -o $@ $<
>                            $(host-cxxshobjs): $(obj)/%.o: $(src)/%.c FORCE
>                            $(call if_changed_dep,host-cxxshobjs)
> 
> 
> 
> 
> We generally use HOSTCC to compile *.c files,
> and HOSTCXX to compile *.cc files.
> 
> 
> But, here, you mention to use HOSTCXX to compile .c files
> such as cyc_complexity_plugin.c, sancov_plugin.c, etc.
> 
> This is not straight-forward.  It is worthwhile to comment the reason.

I wrote a comment about it here:
https://github.com/ephox-gcc-plugins/gcc-plugins_linux-next/commit/74f6343a7f13c071e00c417332051e25f15009ea

-- 
Emese