ext-odbc.patch

diff --git a/make-gcc/makefile b/make-gcc/makefile
index 0e8d600..bddfeca 100644
--- a/make-gcc/makefile
+++ b/make-gcc/makefile
@@ -243,3 +243,8 @@ $O/graphics.o:      $S/agg/graphics.cpp $(INCS)
 $O/rich_text.o:     $S/agg/rich_text.cpp $(INCS) 
        $C $(CFLAGS)  -o $O/rich_text.o $S/agg/rich_text.cpp
 
+
+#--- Extension Libraries:
+
+$L/ext-odbc.dll:    $S/os/win32/host-odbc.c $(INCS) $I/reb-host.h $I/host-lib.h $I/sys-net.h
+       $C -O1 -DUNICODE -fpack-struct -I $S/include -o $L/ext-odbc.dll $S/os/win32/host-odbc.c -shared -DODBC_DLL -luser32 -lodbc32
diff --git a/src/os/win32/host-odbc.c b/src/os/win32/host-odbc.c
index fe2a59c..96c3a66 100644
--- a/src/os/win32/host-odbc.c
+++ b/src/os/win32/host-odbc.c
@@ -343,7 +343,12 @@ SQLRETURN  ODBC_FetchResults      (RXIFRM *frm, SQLHSTMT hstmt, int num_columns,
 
 /*******************************************************************************
 **
-*/     RXIEXT int RXD_ODBC(int cmd, RXIFRM *frm, void *data)
+*/
+#ifndef ODBC_DLL
+       RXIEXT int RXD_ODBC(int cmd, RXIFRM *frm, void *data)
+#else
+       int RX_Call(int cmd, RXIFRM *frm, void *data)
+#endif
 /*
 **             ODBC command extension dispatcher.
 **
@@ -386,6 +391,7 @@ SQLRETURN  ODBC_FetchResults      (RXIFRM *frm, SQLHSTMT hstmt, int num_columns,
 }
 
 
+#ifndef ODBC_DLL
 /*******************************************************************************
 **
 */     void Init_ODBC(void)
@@ -395,6 +401,23 @@ SQLRETURN  ODBC_FetchResults      (RXIFRM *frm, SQLHSTMT hstmt, int num_columns,
        RL = (RL_LIB *)RL_Extend((REBYTE *)(&RX_odbc[0]), (RXICAL)&RXD_ODBC);
 }
 
+#else
+
+RL_LIB *RL;
+
+/*******************************************************************************
+**
+*/     const char *RX_Init(int opts, RL_LIB *lib)
+/*
+**             ODBC extension initialisation, if built as external DLL.
+**
+*******************************************************************************/
+{
+       RL = lib;
+       return RX_odbc;
+}
+#endif
+
 
 /*******************************************************************************
 **