Can you switch from CLang back to gcc in FreeBSD 10.0

[Shane Ambler]

On 09/01/2014 12:16, RW wrote:
> On Wed, 08 Jan 2014 23:37:21 +0000
> Frank Leonhardt wrote:
> 
>> On 08/01/2014 22:58, RW wrote:
>>> On Wed, 08 Jan 2014 20:46:22 +0000
>>> Frank Leonhardt wrote:
>>>
>>>> I've been dreading this for over a year now.
>>> Any particular reason why you have to build the base system with
>>> gcc?
>>>
>>>> It's going to reach
>>>> critical soon. FreeBSD 10 is dropping gcc in favour of Clang
>>>
>>> I don't think that's quite true:
>>>
>>>
>>>    <http://lists.freebsd.org/pipermail/freebsd-current/2013-September/044313.html>
>>>
>>
>> As I understand it (and I haven't tried it, hence my question), all
>> that does is build gcc along with the other stuff. It doesn't make
>> gcc the default (only) compiler. Sean's editing of /etc/make.conf
>> goes some way 
>> - or even hacking sys.mk. However, /usr/bin/cc wouldn't be linked to
>> gcc for a start, 
> 
> 
> I think the canonical way of building world with gcc is to set
> WITHOUT_CLANG_IS_CC (it's discussed in the thread I quoted) there's
> also WITHOUT_CLANG.

In 10.0 WITHOUT_GCC and WITH_CLANG_IS_CC are the default. You can
buildworld using WITH_GCC and WITH_GCC_IS_CC and even WITHOUT_CLANG (man
src.conf lists options) but consider the age of gcc v4.2.1 -(C)2007-
that get's installed, it doesn't know what a corei7 is and it doesn't
have the other bug fixes included with the later 4.2.x releases.

If you want to use gcc I would suggest using gcc46 or gcc48 rather than
gcc from base.