概述
由于PHP7.4安装时启用了--with-external-pcre选项，但系统安装的pcre2版本默认为10.23低于php要求的10.30。
报错内容
Requested 'libpcre2-8 >= 10.30' but version of libpcre2-8 is 10.23
Consider adjusting the PKG_CONFIG_PATH environment variable if you
installed software in a non-standard prefix.
Alternatively, you may set the environment variables PCRE2_CFLAGS
and PCRE2_LIBS to avoid the need to call pkg-config.
See the pkg-config man page for more details.解决办法
前往pcre2官方github库下载合适的版本安装包：https://github.com/PhilipHazel/pcre2/releases
[root@zabbix ~]# wget https://github.com/PhilipHazel/pcre2/releases/download/pcre2-10.38/pcre2-10.38.tar.gz
[root@zabbix ~]# tar zxf pcre2-10.38.tar.gz
[root@zabbix ~]# cd pcre2-10.38/
[root@zabbix pcre2-10.38]# ./configure --prefix=/usr/local/pcre2 --enable-pcre2-16 --enable-pcre2-32 --enable-jit --enable-jit-sealloc
[root@zabbix pcre2-10.38]# make -j 4&make install
[root@zabbix pcre2-10.38]# export PKG_CONFIG_PATH=/usr/local/pcre2/lib/pkgconfig/文章来源于互联网:PHP7.4安装pcre库时初始化开始编译时失败
