Suricata

Victor Julien wrote in #note-1:

Suricata 8 needs a more recent compiler than gcc 4.8.

Another error occurs when I attempt to use the following versions：
scl enable devtoolset-8 （gcc version 8.3.1 20190311 (Red Hat 8.3.1-3) (GCC)
）
scl enable devtoolset-9 （gcc version 9.3.1 20200408 (Red Hat 9.3.1-2) (GCC)）

./configure --with-libpcap-includes=/usr/local/libpcap-1.10.4/include --with-libpcap-libraries=/usr/local/libpcap-1.10.4/lib
error：
checking for pcap.h... no
configure: error: pcap.h not found ...

configure:21396: checking for pcap.h
configure:21396: gcc -c -g -O2 -fPIC -DOS_LINUX -std=c11 -march=native -I/usr/local/libpcap-1.10.4/include conftest.c >&5
In file included from /usr/local/libpcap-1.10.4/include/pcap/pcap.h:133,
from /usr/local/libpcap-1.10.4/include/pcap.h:43,
from conftest.c:158:
/usr/local/libpcap-1.10.4/include/pcap/bpf.h:97:9: error: unknown type name 'u_int'
97 | typedef u_int bpf_u_int32; | ^_~~
/usr/local/libpcap-1.10.4/include/pcap/bpf.h:117:2: error: unknown type name 'u_int'
117 | u_int bf_len; | ^_~~
/usr/local/libpcap-1.10.4/include/pcap/bpf.h:245:2: error: unknown type name 'u_short'
245 | u_short code; | ^_~~~~
/usr/local/libpcap-1.10.4/include/pcap/bpf.h:246:2: error: unknown type name 'u_char'
246 | u_char jt; | ^_~~~
/usr/local/libpcap-1.10.4/include/pcap/bpf.h:247:2: error: unknown type name 'u_char'
247 | u_char jf;

I've tried several pcap versions, all of which throw the above error.（libpcap-1.8.1、1.10.4、1.10.5..）
Can we not use scl to update the gcc environment for compilation?

Also note that CentOS 7 has been end-of-life for over a year now, which means we no longer test on it.