patch 7.4.988
Problem:    Default test target is test49.out.
Solution:   Add a build rule before including Make_all.mak.
diff --git a/src/testdir/Make_os2.mak b/src/testdir/Make_os2.mak
index fd25ab8..828d354 100644
--- a/src/testdir/Make_os2.mak
+++ b/src/testdir/Make_os2.mak
@@ -8,6 +8,8 @@
 
 VIMPROG = ../vim.exe
 
+default: all
+
 include Make_all.mak
 
 # Omitted: