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#serial 3
dnl From Jim Meyering.
dnl Find a new-enough version of Perl.
dnl
AC_DEFUN(jm_PERL,
[
dnl FIXME: don't hard-code 5.003
dnl FIXME: should we cache the result?
AC_MSG_CHECKING([for perl5.003 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="$missing_dir/missing 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 ( $perl -e 'require 5.003; use File::Compare' ) > /dev/null 2>&1; then
PERL=$perl
found=yes
break
fi
done
AC_MSG_RESULT($found)
test $found = no && AC_MSG_WARN([
WARNING: You don't seem to have perl5.003 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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