4 dnl Find a new-enough version of Perl.
6 # Copyright (C) 1998-2001, 2003-2004, 2007, 2009-2020 Free Software Foundation,
9 # This file is free software; the Free Software Foundation
10 # gives unlimited permission to copy and/or distribute it,
11 # with or without modifications, as long as this notice is preserved.
15 dnl FIXME: don't hard-code 5.005
16 AC_MSG_CHECKING([for perl5.005 or newer])
17 if test "${PERL+set}" = set; then
18 # 'PERL' is set in the user's environment.
19 candidate_perl_names="$PERL"
22 candidate_perl_names='perl perl5'
28 PERL="$am_missing_run perl"
29 for perl in $candidate_perl_names; do
30 # Run test in a subshell; some versions of sh will print an error if
31 # an executable is not found, even if stderr is redirected.
32 if ( $perl -e 'require 5.005; use File::Compare; use warnings;' ) > /dev/null 2>&1; then
39 AC_MSG_RESULT([$found])
40 test $found = no && AC_MSG_WARN([
41 WARNING: You don't seem to have perl5.005 or newer installed, or you lack
42 a usable version of the Perl File::Compare module. As a result,
43 you may be unable to run a few tests or to regenerate certain
44 files if you modify the sources from which they are derived.