HEADS UP: merged llvm/clang 3.4

[Dimitry Andric]

On 23 Mar 2014, at 13:18, Schaich Alonso <alonsoschaich at fastmail.fm> wrote:
> On Sun, 23 Mar 2014 12:40:07 +0200
> Ivan Klymenko <fidaj at ukr.net> wrote:
> 
>> В Sun, 23 Mar 2014 02:29:38 -0700 (PDT)
>> Jakub Lach <jakub_lach at mailplus.pl> пишет:
>> 
>>> Well, speaking of strangeness, I cannot build kernel on amd64.
>>> 
>>> cc -O2 -pipe -I. -I/usr/src/sys/dev/aic7xxx/aicasm -std=gnu99 
>>> -Wsystem-headers -Werror -Wall -Wno-format-y2k -W
>>> -Wno-unused-parameter -Wstrict-prototypes -Wmissing-prototypes
>>> -Wpointer-arith -Wreturn-type -Wcast-qual -Wwrite-strings -Wswitch
>>> -Wshadow -Wunused-parameter -Wcast-align -Wno-pointer-sign -c
>>> aicasm_gram.c aicasm_gram.c:2:19: error: unused variable 'yysccsid'
>>> [-Werror,-Wunused-const-variable]
>>> static const char yysccsid[] = "@(#)yaccpar     1.9 (Berkeley)
>>> 02/21/93"; ^
>>> 1 error generated.
>>> *** Error code 1
>>> 
>>> Stop.
>>> make[2]: stopped in /usr/obj/usr/src/sys/GENERIC
>>> *** Error code 1
>>> 
>>> Stop.
>>> make[1]: stopped in /usr/src
>>> *** Error code 1
>>> 
>> 
>> I have the exact same problem...
> 
> As a workaround, you can avoid this by inserting
> 
>> NO_WERROR=
>> WERROR=
> 
> into src.conf.

Aha, now I get it.  You seem to be building stable/9 from a stable/10 or
newer host, which contains a newer version of yacc?  Apparently it
inserts an unused banner into the produced parser, which clang then
complains about.

The best solution is obviously to remove the banner, which is now being
checked with the upstream yacc maintainer.  Since people will be stuck
with the "wrong" version of yacc for some time, I guess the easiest way
is to disable warnings for aicasm for now.

It is not as if anybody cares about warnings in aicasm; it has already
been removed in head. :-)

-Dimitry

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