suppress "SQL_API redefined" error with -Werror

connectivity/source/drivers/odbc/makefile.mk

@@ -35,6 +35,10 @@ VISIBILITY_HIDDEN=TRUE
 USE_DEFFILE=TRUE
 LDUMP=ldump2.exe
 
+.IF "$(GUI)$(COM)" == "WNTGCC"
+EXTERNAL_WARNINGS_NOT_ERRORS = TRUE
+.ENDIF
+
 # --- Settings ----------------------------------
 
 .IF "$(DBGUTIL_OJ)"!=""

connectivity/source/drivers/odbcbase/makefile.mk

@@ -33,6 +33,10 @@ TARGET=odbcbase
 ENABLE_EXCEPTIONS=TRUE
 VISIBILITY_HIDDEN=TRUE
 
+.IF "$(GUI)$(COM)" == "WNTGCC"
+EXTERNAL_WARNINGS_NOT_ERRORS = TRUE
+.ENDIF
+
 # --- Settings ----------------------------------
 
 .INCLUDE : settings.mk