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