Perl 5.22 complaining about:

Unescaped left brace in regex is deprecated, passed through in regex;

marked by <-- HERE in m/\${ <-- HERE ([^ \t=:+{}]+)}/ at

/builds/userland/automake/automake-1.15/build/i386/bin/automake line 393

Should send this upstream.

--- automake-1.15/bin/automake.in_orig 2016-03-16 10:40:04.299092544 -0700

+++ automake-1.15/bin/automake.in 2016-03-16 10:40:39.216683002 -0700

@@ -3878,7 +3878,7 @@

sub substitute_ac_subst_variables

{

my ($text) = @_;

- $text =~ s/\${([^ \t=:+{}]+)}/substitute_ac_subst_variables_worker ($1)/ge;

+ $text =~ s/\$\{([^ \t=:+{}]+)}/substitute_ac_subst_variables_worker ($1)/ge;

return $text;

}