* aclocal.in (write_aclocal): Improve warning for mismatched

Autoconf version.

1 files changed, 3 insertions, 1 deletions

diff --git a/aclocal.in b/aclocal.in
index 5cc280f9f..3e4ab885d 100644
--- a/aclocal.in
+++ b/aclocal.in
@@ -783,7 +783,9 @@ sub write_aclocal ($@)
       # use it in the header below.  autom4te will output the name of
       # the file in the diagnostic anyway.
       $output = "m4_if(m4_PACKAGE_VERSION, [$ac_version],,
-[m4_fatal([this file was generated for autoconf $ac_version], [63])])
+[m4_fatal([this file was generated for autoconf $ac_version.
+You have another version of autoconf.  If you want to use that,
+you should regenerate the build system entirely.], [63])])
 
 $output";
     }