Re: ``make buildkernel'' fails when /usr/obj is empty

On 01/06/2018 03:41, Warner Losh wrote:
> On Thu, May 31, 2018 at 11:47 AM, Dimitry Andric <dim_at_freebsd.org> wrote:
> 
>> On 31 May 2018, at 18:04, Benjamin Kaduk <kaduk_at_MIT.EDU> wrote:
>>>
>>> On Thu, May 31, 2018 at 09:58:50AM +0200, Gary Jennejohn wrote:
>>>> On Thu, 31 May 2018 09:52:22 +0200
>>>> Gary Jennejohn <gljennjohn_at_gmail.com> wrote:
>>>>
>>>>> There's something totally screwy about trying to build a kernel when
>>>>> /usr/obj is not populated.
>>>>>
>>>>> I ran ``make clean'' in /usr/src and then ``make buildkernel''.  This
>>>>> fails with
>>>>>     make[2]: "/usr/src/sys/conf/kern.pre.mk" line 125: amd64 kernel
>>>>>     requires linker ifunc support
>>>>>
>>>>> This is total BS because
>>>>>
>>>>> /usr/bin/ld --version
>>>>> LLD 6.0.0 (FreeBSD 326565-1200002) (compatible with GNU linkers)
>>>>>
>>>>> which is exactly what bsd.linker.mk is looking for to set ifunc.
>>>>>
>>>>> If I do this:
>>>>>
>>>>> mkdir -p /usr/obj/usr/src/amd64.amd64/tmp/legacy/usr/bin
>>>>> cp /usr/bin/ld /usr/obj/usr/src/amd64.amd64/tmp/legacy/usr/bin
>>>>>
>>>>> the buildkernel then succeeds.
>>>>>
>>>>> Considering that (reformatted output from make)
>>>>>
>>>>> PATH=/usr/obj/usr/src/amd64.amd64/tmp/legacy/usr/sbin:
>>>>> /usr/obj/usr/src/amd64.amd64/tmp/legacy/usr/bin:
>>>>> /usr/obj/usr/src/amd64.amd64/tmp/legacy/bin:
>>>>> /usr/obj/usr/src/amd64.amd64/tmp/usr/sbin:
>>>>> /usr/obj/usr/src/amd64.amd64/tmp/usr/bin:
>>>>> /sbin:/bin:/usr/sbin:/usr/bin
>>>>>
>>>>> it seems like /usr/bin/ld should be found by bsd.linker.mk and no
>>>>> error should be reported.
>>>>>
>>>>
>>>> OK, it seems that ``make clean'' does not remove the contents of
>>>> /usr/obj/usr/src/amd64.amd64/tmp/legacy.  If I delete everything
>>>> under /usr/obj then ``make buildkernel'' works.
>>>>
>>>> Still, it seems pretty strange to me to make building a kernel
>>>> depend on some random junk which is left laying around under
>>>> /usr/obj.
>>>
>>> Whatever happened to the "run buildworld or kernel-toolchain before
>>> buildkernel" requirement?
>>
>> That is still a requirement, yes.  Otherwise, you might have outdated
>> toolchain components are in your /usr/obj.
>>
> 
> Usually you can get away without doing that, and now that clang is the
> toolchain that's rebuilt (and that's not fast) people try to get away with
> it more and more...

There is WITH_SYSTEM_COMPILER to not bootstrap if possible.


-- 
FreeBSD - the place to B...Software Developing

Shane Ambler