(jm_WINSIZE_IN_PTEM): Do not define

[gnulib.git] / m4 / perl.m4

diff --git a/m4/perl.m4 b/m4/perl.m4
index 0cc681c..ff8c141 100644 (file)
--- a/m4/perl.m4
+++ b/m4/perl.m4
@@ -1,10 +1,10 @@
-#serial 1
+#serial 4
 
 dnl From Jim Meyering.
 dnl Find a new-enough version of Perl.
 dnl
 
-AC_DEFUN(jm_PERL,
+AC_DEFUN([jm_PERL],
 [
   dnl FIXME: don't hard-code 5.003
   dnl FIXME: should we cache the result?
@@ -24,7 +24,7 @@ AC_DEFUN(jm_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' ) > /dev/null 2>&1; then
+    if ( $perl -e 'require 5.003; use File::Compare' ) > /dev/null 2>&1; then
       PERL=$perl
       found=yes
       break
@@ -33,7 +33,9 @@ AC_DEFUN(jm_PERL,
 
   AC_MSG_RESULT($found)
   test $found = no && AC_MSG_WARN([
-*** You don't seem to have perl5.003 or newer installed.
-*** Because of that, you may be unable to regenerate certain files
-*** if you modify the sources from which they are derived.] )
+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.
+] )
 ])