OS/2 build bustage

configure.in

@@ -1011,6 +1011,10 @@ case "$host" in
     HOST_OPTIMIZE_FLAGS="${HOST_OPTIMIZE_FLAGS=-O3}"
     ;;
 
+*-os2*)
+    HOST_CFLAGS="$HOST_CFLAGS -Zomf"
+    ;;
+
 *cygwin*|*mingw*|*mks*|*msvc*|*wince)
     if test -n "$_WIN32_MSVC"; then
         HOST_CFLAGS="$HOST_CFLAGS -TC -nologo"