CentOS 7.8 编译安装Redis 6.0.5报错
In file included from server.c:30:0:
server.h:1045:5: error: expected specifier-qualifier-list before ‘_Atomic’
_Atomic unsigned int lruclock; /* Clock for LRU eviction */
^
server.c: In function ‘serverLogRaw’:
server.c:1028:31: error: ‘struct redisServer’ has no member named ‘logfile’
int log_to_stdout = server.logfile[0] == '\0';
^
server.c:1031:23: error: ‘struct redisServer’ has no member named ‘verbosity’
if (level < server.verbosity) return;
^
server.c:1033:47: error: ‘struct redisServer’ has no member named ‘logfile’
fp = log_to_stdout ? stdout : fopen(server.logfile,"a");
^
server.c:1046:47: error: ‘struct redisServer’ has no member named ‘timezone’
nolocks_localtime(&tm,tv.tv_sec,server.timezone,server.daylight_active);
^
server.c:1046:63: error: ‘struct redisServer’ has no member named ‘daylight_active’
nolocks_localtime(&tm,tv.tv_sec,server.timezone,server.daylight_active);
......
......

问题原因
CentOS 7的gcc版本为4.8.5，Redis 6.0.5最低需要gcc4.9，因此需要升级gcc版本
from redis 6.0.5, building redis from source code needs C11 support.The version of gcc in CentOS 7 is 4.8.5, but C11 was introduced in 4.9.

解决办法
1、手动编译gcc大于4.9的版本
2、安装 devtoolset-9(使用高版本gcc version 9.3.1 20200408 (Red Hat 9.3.1-2) (GCC))编译安装Redis 6.0.5
yum install centos-release-scl -y
yum install devtoolset-9 -y

临时使用高版本gcc version 9.3.1 20200408 (Red Hat 9.3.1-2) (GCC) (推荐使用这个方法)
export CC=/opt/rh/devtoolset-9/root/usr/bin/gcc
export CPP=/opt/rh/devtoolset-9/root/usr/bin/cpp
export CXX=/opt/rh/devtoolset-9/root/usr/bin/c++

wget http://download.redis.io/releases/redis-stable.tar.gz
tar zxf redis-stable.tar.gz && cd redis-stable
make -j2 && make install
if [ -f "/root/redis-stable/src/redis-server" ]; then
mkdir -p /usr/local/redis/{bin,etc,var}
/bin/cp /root/redis-stable/src/{redis-benchmark,redis-check-aof,redis-check-rdb,redis-cli,redis-sentinel,redis-server} /usr/local/redis/bin/
/bin/cp /root/redis-stable/redis.conf /usr/local/redis/etc/

cd /root/redis-stable/src
id -u redis >/dev/null 2>&1
[ $? -ne 0 ] && useradd -M -s /sbin/nologin redis

chown -R redis:redis /usr/local/redis/{var,etc}
#
if [ -e /bin/systemctl ]; then
cat > /lib/systemd/system/redis-server.service << "EOF"
[Unit]
Description=Redis In-Memory Data Store
After=network.target

[Service]
Type=forking
PIDFile=/var/run/redis/redis.pid
User=redis
Group=redis

Environment=statedir=/var/run/redis
PermissionsStartOnly=true
ExecStartPre=/bin/mkdir -p ${statedir}
ExecStartPre=/bin/chown -R redis:redis ${statedir}
ExecStart=/usr/local/redis/bin/redis-server /usr/local/redis/etc/redis.conf
ExecStop=/bin/kill -s TERM $MAINPID
Restart=always
LimitNOFILE=1000000
LimitNPROC=1000000
LimitCORE=1000000

[Install]
WantedBy=multi-user.target
EOF
systemctl enable redis-server

#确认Redis 6.0.5版本
[www@zhangfangzhou_cn ~]# redis-server -v
Redis server v=6.0.5 sha=00000000:0 malloc=jemalloc-5.1.0 bits=64 build=1987ac006866aa00

CentOS7.7安装 devtoolset-8(使用高版本gcc (GCC) 8.3.1 20190311)编译安装aria2-1.35.0
CentOS6安装devtoolset(使用高版本gcc)GCC 4.8 GCC 4.9 GCC 5.2

Aria2是一个支持HTTP/HTTPS, FTP, SFTP, BitTorrent和Metalink等协议的轻量级命令行下载工具。
编译安装aria2-1.35.0的时候出现错误，提示需要高版本gcc支持。
......
checking whether g++ supports C++11 features with -std=c++11 ... no
checking whether g++ supports C++11 features with -std=c++11 -stdlib=libc++... no
checking whether g++ supports C++11 features with -std=c++0x ... no
checking whether g++ supports C++11 features with -std=c++0x -stdlib=libc++... no
configure: error: *** A compiler with support for C++11 language features is required.
......

CentOS7.7默认的GCC版本为gcc (GCC) 4.8.5 20150623 (Red Hat 4.8.5-39)
#gcc --version
gcc (GCC) 4.8.5 20150623 (Red Hat 4.8.5-39)
#cat /etc/redhat-release
CentOS Linux release 7.7.1908 (Core)

解决方法有两种
1、手动编译gcc>4.8的版本
自行编译
2、安装devtoolset-8(使用高版本gcc (GCC) 8.3.1 20190311
yum install centos-release-scl -y
yum install devtoolset-8 -y
启用devtoolset-8
#scl enable devtoolset-8 -- bash
#source /opt/rh/devtoolset-8/enable

临时编译前使用高版本gcc (GCC) 8.3.1 20190311 (推荐使用这个方法)
export CC=/opt/rh/devtoolset-8/root/usr/bin/gcc
export CPP=/opt/rh/devtoolset-8/root/usr/bin/cpp
export CXX=/opt/rh/devtoolset-8/root/usr/bin/c++
继续编译安装aria2-1.35.0
......

CentOS6安装devtoolset(使用高版本gcc)GCC 4.8 GCC 4.9 GCC 5.2

CentOS6安装devtoolset(使用高版本gcc)GCC 4.8 GCC 4.9 GCC 5.2