improved error trace in case ./configure cannot find mysql dependencies

diff --git a/configure.ac b/configure.ac
index d9497eb0d50e1a2df32b7faef8bc6a07750c1b16..79666ce6cd9ff8ccb166a04f6f744627aea56a2d 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -695,7 +695,7 @@ fi
 
 if test "$MYSQL_CONFIG" != "" ; then
     if test -d "$MYSQL_CONFIG" -o ! -x "$MYSQL_CONFIG" ; then
-        AC_MSG_ERROR([--with-mysql should point to a mysql_config program])
+        AC_MSG_ERROR([MySQL dependencies cannot be found. Please install MySQL libraries or point --with-mysql to mysql_config program if it is located in non-default directory, eg. --with-mysql=/opt/mysql/bin/mysql_config.])
     fi
 
     MYSQL_CPPFLAGS=`$MYSQL_CONFIG --cflags`