Date: Wed, 8 Feb 2023 06:32:49 +0000 From: Gary Jennejohn <garyj@gmx.de> To: Zhenlei Huang <zlei@FreeBSD.org> Cc: freebsd-current@freebsd.org Subject: Re: kernel compile fails if device bpf is not enabled Message-ID: <20230208073249.4ccb5fb7@ernst.home> In-Reply-To: <4FF5CEED-A667-455A-8BFC-960B50E8D93D@FreeBSD.org> References: <20230207100812.76d206d4@ernst.home> <4FF5CEED-A667-455A-8BFC-960B50E8D93D@FreeBSD.org>
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On Wed, 8 Feb 2023 12:49:46 +0800 Zhenlei Huang <zlei@FreeBSD.org> wrote: Hi Zhenlei, > Thanks for the report! Post the fix to Phabricator https://reviews.freeb= sd.org/D38432 <https://reviews.freebsd.org/D38432>; . > > Best regards, > Zhenlei > Thanks! I see it's been accepted. > > On Feb 7, 2023, at 5:08 PM, Gary Jennejohn <garyj@gmx.de> wrote: > > > > I just saw this error today because I didn't have device bpf enabled i= n > > my kernel configuration file: > > > > -------------------------------------------------------------- > >>>> stage 3.1: building everything > > -------------------------------------------------------------- > > linking kernel.full > > ld: error: undefined symbol: bpf_mtap_if > >>>> referenced by if.c:4724 (/usr/src/sys/net/if.c:4724) > >>>> if.o:(if_bpfmtap) > >>>> referenced by if_tuntap.c:1717 (/usr/src/sys/net/if_tuntap.c:1717) > >>>> if_tuntap.o:(tunread) > >>>> referenced by if_vlan.c:1292 (/usr/src/sys/net/if_vlan.c:1292) > >>>> if_vlan.o:(vlan_transmit) > > > > ld: error: undefined symbol: bpf_mtap2_if > >>>> referenced by if_gif.c:323 (/usr/src/sys/net/if_gif.c:323) > >>>> if_gif.o:(gif_transmit) > >>>> referenced by if_tuntap.c:1816 (/usr/src/sys/net/if_tuntap.c:1816) > >>>> if_tuntap.o:(tunwrite) > > --- kernel.full --- > > *** [kernel.full] Error code 1 > > > > This happens because a dummy bpf_mtap_if() (called a NOP stub in bpf.c= ) > > isn't being defined if bpf is not enabled. > > > > -- > > Gary Jennejohn > > =2D- Gary Jennejohn
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