Add note how to build DBA as shared

diff --git a/ext/dba/config.m4 b/ext/dba/config.m4
index a47f32bbf7d476e3f91b842d8c62f99d4a9bf454..dfea9e2b5445a1a1b3f28a98389c853b16708bf1 100644 (file)
--- a/ext/dba/config.m4
+++ b/ext/dba/config.m4
@@ -66,7 +66,8 @@ AC_DEFUN([AC_DBA_STD_RESULT],[
 ])
 
 PHP_ARG_ENABLE(dba,whether to enable DBA,
-[  --enable-dba            Build DBA with builtin modules])
+[  --enable-dba            Build DBA with builtin modules. To build shared DBA
+                          extension use --enable-dba=shared])
 
 AC_ARG_WITH(qdbm,
 [  --with-qdbm[=DIR]         DBA: Include QDBM support],[