Cannot compile on CentOS 7 3.10.0-1160.59.1.el7.x86_64

[nielsk]

I cloned the git-repository (and I tried the same with version 2.4).
./configure works, but on the make all-step, I get the following error:

# ./configure
Module version: 2.6-7-g6a55739
Kernel version: 3.10.0-1160.59.1.el7.x86_64 (uname)
Kernel sources: /lib/modules/3.10.0-1160.59.1.el7.x86_64/build (found)
Checking for presence of include/linux/netfilter.h... Yes
netfilter.h uses CONFIG_NF_NAT_NEEDED... Yes
Checking for presence of include/linux/llist.h... Yes
Checking for presence of include/linux/grsecurity.h... No
Iptables binary version: 1.4.21 (detected from /usr/sbin/iptables)
pkg-config for version 1.4.21 exists: Yes
Check for working gcc: Yes (gcc)
Checking for presence of xtables.h... Yes (using pkg-config)
Iptables include flags:   (pkg-config)
Iptables module path: /usr/lib64/xtables (pkg-config)
Searching for net-snmp-config... Yes /usr/bin/net-snmp-config
Searching for net-snmp agent... Yes.
Checking for DKMS... Yes.
Creating Makefile.. done.

  If you need some options enabled run ./configure --help
  Now run: make all install

# make all
./gen_compat_def > compat_def.h-
Test function xt_family linux/netfilter_ipv4/ip_tables.h  declared
Test struct timeval linux/ktime.h  declared
Test struct proc_ops linux/proc_fs.h  undeclared
Test function synchronize_sched linux/rcupdate.h  declared
Test function nf_bridge_info_get linux/netfilter_bridge.h  undeclared
Test struct vlan_dev_priv linux/if_vlan.h  declared
Test function put_unaligned_be24 asm/unaligned.h  undeclared
Test function totalram_pages linux/mm.h  undeclared
Test symbol totalram_pages linux/mm.h  declared
Test member nf_ct_event_notifier.ct_event net/netfilter/nf_conntrack_ecache.h  undeclared
mv compat_def.h- compat_def.h
Compiling 2.6-7-g6a55739 for kernel 3.10.0-1160.59.1.el7.x86_64
make -C /lib/modules/3.10.0-1160.59.1.el7.x86_64/build M=/root/ipt-netflow modules
make[1]: Entering directory `/usr/src/kernels/3.10.0-1160.59.1.el7.x86_64'
  CC [M]  /root/ipt-netflow/ipt_NETFLOW.o
In file included from /root/ipt-netflow/ipt_NETFLOW.c:77:0:
/root/ipt-netflow/compat.h:777:6: warning: "__has_attribute" is not defined [-Wundef]
 # if __has_attribute(__fallthrough__)
      ^
/root/ipt-netflow/compat.h:777:21: error: missing binary operator before token "("
 # if __has_attribute(__fallthrough__)
                     ^
make[2]: *** [/root/ipt-netflow/ipt_NETFLOW.o] Error 1
make[1]: *** [_module_/root/ipt-netflow] Error 2
make[1]: Leaving directory `/usr/src/kernels/3.10.0-1160.59.1.el7.x86_64'
make: *** [ipt_NETFLOW.ko] Error 2

Any idea what is going wrong?

[nielsk]

After changing the fallthrough-lines in compat.h around line 777 to:

 * keyword for switch/case use") */
#ifndef fallthrough
#  define fallthrough                   do {} while (0)  /* fallthrough */
#endif

I could succesfully compile the module

[aabc]

Thanks for the report, should be fixed in master.