2015
am--refresh target assumed to be provided by top-level Makefile is not documented
(via)if automake-generated Makefile ignores modifications you brought to Makefile.am, try --enable-maintainer-mode in your ./configure stanza.
2011
perlfaq6 - what is /o really for ?
(via)The /o option for regular expressions (documented in perlop and perlreref) tells Perl to compile the regular expression only once.
This is only useful when the pattern contains a variable.
Perls 5.6 and later handle this automatically if the pattern does not change.
1
(2 marks)
