When installing xdebug on mac, the following error message appears

The following error appears when installing xdebug on mac

grep: /usr/include/php/main/php.h: No such file or directory
grep: /usr/include/php/Zend/zend_modules.h: No such file or directory
grep: /usr/include/ php/Zend/zend_extensions.h: No such file or directory
Configuring for:
PHP Api Version:
Zend Module Api No:
Zend Extension Api No:
autom4te: need GNU m4 1.4 or later: /usr/bin/m4

Someone has mentioned it before, but I have an extra last line. I don’t know what to do. Please help!