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

[Bruce Richardson <bruce.richardson@intel.com>]

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
> 
> 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! :-)