The following files are included in the distribution as
c source, and make does not force regenerating them from
the corresponding .y or .l file:

ext/standard/parsedate.c
main/configuration-parser.c
main/configuration-scanner.c
Zend/zend-parser.c
Zend/zend-scanner.c

Some of them contain hard-coded paths beginning with /home. On a system where /home is automounted, these result in
"permission denied" errors and the make fails.

Workaround is to remove the files listed above before invoking make.