g++: error: unrecognized command line option ‘-std=c++14’

I’m getting the above error when installing with pecl on CentOS 7.9 with WHM/cPanel

if I use the command /opt/cpanel/ea-php80/root/usr/bin/pecl install grpc , I get an issue, but when using /opt/cpanel/ea-php74/root/usr/bin/pecl install grpc it will install, what am I doing wrong?

my development environment is php 8.0, and installing it with the 7.4 pecl wont allow me to use it from 8.0 cli

I’ve got g++ 7.3.1, and installed devtoolset 7.

When building from source using https://github.com/grpc/grpc/tree/master/src/php#build-from-source < this guide, the same issue c++: error: unrecognized command line option ‘-std=c++14’ upon attempting the make command.

I’m trying to use the PHP client library for the Google Ads API.

Can someone please advise/help, I’ve been trying to do this now for the last 3 days.