Re: [dpdk-dev] Build failure on FreeBSD-10.1-RELEASE

[Thomas Monjalon <thomas.monjalon@6wind.com>]

2015-03-05 16:08, Tetsuya Mukawa:
> On 2015/03/04 19:15, Bruce Richardson wrote:
> > On Wed, Mar 04, 2015 at 10:33:14AM +0100, Olivier MATZ wrote:
> >> Hi Tetsuya, Hi Bruce,
> >>
> >> On 03/04/2015 04:34 AM, Tetsuya Mukawa wrote:
> >>> On 2015/03/02 19:22, Bruce Richardson wrote:
> >>>> On Mon, Mar 02, 2015 at 12:47:42PM +0900, Tetsuya Mukawa wrote:
> >>>>> Hi,
> >>>>>
> >>>>> I got a error while building master branch on FreeBSD.
> >>>>> Here is a log.
> >>>>>
> >>>>> $ gmake T=x86_64-native-bsdapp-clang config
> >>>>> cc: error: unknown argument: '-fdirectives-only'
> >>>>> cp: /usr/home/mukawa/work/dpdk/build/.config_tmp: No such file or directory
> >>>>> cp: /usr/home/mukawa/work/dpdk/build/.config_tmp: No such file or directory
> >>>>> gmake[3]: Nothing to be done for 'depdirs'.
> >>>>> Configuration done
> >>>>>
> >>>>>
> >>>>> Here is log came from 'uname'
> >>>>>
> >>>>> $ uname -a
> >>>>> FreeBSD eris.hq.igel.co.jp 10.1-RELEASE FreeBSD 10.1-RELEASE #0 r274401:
> >>>>> Tue Nov 11 21:02:49 UTC 2014
> >>>>>
> >>>>>
> >>>>> I've tried to remove '-fdirectives-only' from mk/rte.sdkconfig.mk like
> >>>>> below.
> >>>>> With the fixing,  It seems I can compile and run testpmd.
> >>>>> (Obviously, we should not merge below patch, but I've done just for testing)
> >>>>>
> >>>>> diff --git a/mk/rte.sdkconfig.mk b/mk/rte.sdkconfig.mk
> >>>>> index d43c430..f8d95b1 100644
> >>>>> --- a/mk/rte.sdkconfig.mk
> >>>>> +++ b/mk/rte.sdkconfig.mk
> >>>>> @@ -75,7 +75,7 @@ else
> >>>>>  $(RTE_OUTPUT)/.config: $(RTE_CONFIG_TEMPLATE) FORCE | $(RTE_OUTPUT)
> >>>>>         $(Q)if [ "$(RTE_CONFIG_TEMPLATE)" != "" -a -f
> >>>>> "$(RTE_CONFIG_TEMPLATE)" ]; then \
> >>>>>                 $(CPP) -undef -P -x assembler-with-cpp \
> >>>>> -               -fdirectives-only -ffreestanding \
> >>>>> +               -ffreestanding \
> >>>>>                 -o $(RTE_OUTPUT)/.config_tmp $(RTE_CONFIG_TEMPLATE) ; \
> >>>>>                 if ! cmp -s $(RTE_OUTPUT)/.config_tmp
> >>>>> $(RTE_OUTPUT)/.config; then \
> >>>>>                         cp $(RTE_OUTPUT)/.config_tmp
> >>>>> $(RTE_OUTPUT)/.config ; \
> >>>>>
> >>>>>
> >>>>> Also, I've checked /usr/ports/net/dpdk, and found below line.
> >>>>> (It seems above ports dpdk package is based on DPDK-1.8.)
> >>>>>
> >>>>>
> >>>>>                 $(CPP) -undef -P -x assembler-with-cpp \
> >>>>>                  -ffreestanding \
> >>>>>                -o $(RTE_OUTPUT)/.config_tmp $(RTE_CONFIG_TEMPLATE) ; \
> >>>>>
> >>>>> So, I guess we should not add '-fdirectives-only' for flags of $(CPP)
> >>>>> for BSD system like dpdk package of ports.
> >>>>>
> >>>>> Thanks,
> >>>>> Tetsuya
> >>>>>
> >>>> Yes, that is correct. In most cases I have tested, the extra flag only gives a
> >>>> warning but it appears its now an error. We should conditionally include or
> >>>> omit the flag for BSD vs Linux, I think.
> >>>>
> >>>> /Bruce
> >>> Hi Bruce,
> >>>
> >>> It seems we cannot use CONFIG_RTE_EXEC_ENV_LINUXAPP/BSDAPP definition here.
> >>> Now I am looking for other way to check target OS.
> >>> Is it not so good to use $(T) definition value here?
> >> Indeed, it seems that the -fdirectives-only option does not exist in
> >> freebsd. This is probably because the default cpp is not GNU cpp:
> >>
> >> On my version, I have:
> >>  FreeBSD clang version 3.3 (tags/RELEASE_33/final 183502) 20130610
> >>  Target: x86_64-unknown-freebsd10.0
> >>  Thread model: posix
> >>
> >> To decide whether using the option, we could check the return value of
> >> cpp -fdirectives-only /dev/null > /dev/null 2>/dev/null
> 
> It’s a great idea.
> 
> >> But I don't really think it's an issue to remove the option for all
> >> OSes. In my opinion, expanding macros when parsing the config files
> >> won't add any issue, and it's probably better to have no differences
> >> between FreeBSD and Linux.
> >>
> >> Regards,
> >> Olivier
> >>
> > +1 
> > I was just going to suggest that this morning! :-)
> 
> Thanks for suggestions.
> I will send a patch that just removes '-fdirectives-only'.

Fixed in http://dpdk.org/browse/dpdk/commit/?id=64702e5f6ff68bff
Thanks