improve error message when missing c-client (just bit me on Ubuntu 8.10)

diff --git a/ext/imap/config.m4 b/ext/imap/config.m4
index d2111c4f7f1b49185c42bc4e3e81833aeaac280f..07026d704d5965799b3fe3b02b9122a0cf0423db 100644 (file)
--- a/ext/imap/config.m4
+++ b/ext/imap/config.m4
@@ -161,10 +161,10 @@ if test "$PHP_IMAP" != "no"; then
     CFLAGS=$old_CFLAGS
 
     if test "$ac_cv_u8t_canonical" = "no" && test "$ac_cv_utf8_mime2text" = "new"; then
-               AC_MSG_ERROR([utf8_mime2text() has new signature, but U8T_CANONICAL is missing. This should not happen. Check config.log for additional information.])
+               AC_MSG_ERROR([utf8_mime2text() has new signature, but U8T_CANONICAL is missing. This should not happen. You may not have c-client installed properly. Check config.log for additional information.])
     fi
     if test "$ac_cv_u8t_canonical" = "yes" && test "$ac_cv_utf8_mime2text" = "old"; then
-               AC_MSG_ERROR([utf8_mime2text() has old signature, but U8T_CANONICAL is present. This should not happen. Check config.log for additional information.])
+               AC_MSG_ERROR([utf8_mime2text() has old signature, but U8T_CANONICAL is present. This should not happen. You may not have c-client installed properly. Check config.log for additional information.])
     fi
 
     dnl Check for c-client version 2001