Re: [PATCH v9 3/4] Add Cyclomatic complexity GCC plugin

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On Tue, 14 Jun 2016 12:29:59 -0700
Laura Abbott <labbott@xxxxxxxxxx> wrote:

> This has some weird interaction with ftrace. On x86
> 
> 1) make mrproper
> 2) make defconfig
> 3) enable GCC_PLUGINS, GCC_PLUGIN_CYC_COMPLEXITY
> 4) enable FUNCTION_TRACER (it will select other options as well)
> 5) make && make modules
> 
>    MODPOST 18 modules
> ERROR: "__fentry__" [net/netfilter/xt_nat.ko] undefined!
> ERROR: "__fentry__" [net/netfilter/xt_mark.ko] undefined!
> ERROR: "__fentry__" [net/netfilter/xt_addrtype.ko] undefined!
> ERROR: "__fentry__" [net/netfilter/xt_LOG.ko] undefined!
> ERROR: "__fentry__" [net/netfilter/nf_nat_sip.ko] undefined!
> ERROR: "__fentry__" [net/netfilter/nf_nat_irc.ko] undefined!
> ERROR: "__fentry__" [net/netfilter/nf_nat_ftp.ko] undefined!
> ERROR: "__fentry__" [net/netfilter/nf_nat.ko] undefined!
> ERROR: "__fentry__" [net/netfilter/nf_log_common.ko] undefined!
> ERROR: "__fentry__" [net/ipv6/netfilter/nf_log_ipv6.ko] undefined!
> ERROR: "__fentry__" [net/ipv4/netfilter/nf_nat_masquerade_ipv4.ko] undefined!
> ERROR: "__fentry__" [net/ipv4/netfilter/nf_nat_ipv4.ko] undefined!
> ERROR: "__fentry__" [net/ipv4/netfilter/nf_log_ipv4.ko] undefined!
> ERROR: "__fentry__" [net/ipv4/netfilter/nf_log_arp.ko] undefined!
> ERROR: "__fentry__" [net/ipv4/netfilter/iptable_nat.ko] undefined!
> ERROR: "__fentry__" [net/ipv4/netfilter/ipt_MASQUERADE.ko] undefined!
> ERROR: "__fentry__" [fs/efivarfs/efivarfs.ko] undefined!
> ERROR: "__fentry__" [drivers/thermal/x86_pkg_temp_thermal.ko] undefined!
> scripts/Makefile.modpost:91: recipe for target '__modpost' failed
> make[1]: *** [__modpost] Error 1
> 
> Verified with gcc-5.3.1 and gcc-6.1.1. You need to do a clean build
> with 'make mrproper' first to see this. Subsequent builds will
> succeed oddly enough. I suspect this

Thanks for the report, I'm looking into it.

-- 
Emese
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