cl /c /Gs /Odi /FPa /Fm /G2 demo90.c 
demo90.c
link /MA /NOE /NOI demo90,,,..\lib\7188s;

Microsoft (R) Segmented-Executable Linker  Version 5.10    
Copyright (C) Microsoft Corp 1984-1990.  All rights reserved.


..\lib\7188s.lib(comport\datasize.c) : error L2029: '_Rear2' : unresolved external
..\lib\7188s.lib(comport\datasize.c) : error L2029: '_InEndIdx4' : unresolved external
..\lib\7188s.lib(comport\datasize.c) : error L2029: '_Front1' : unresolved external
..\lib\7188s.lib(comport\datasize.c) : error L2029: '_Front2' : unresolved external
..\lib\7188s.lib(comport\datasize.c) : error L2029: '_InBeginIdx4' : unresolved external
..\lib\7188s.lib(comport\datasize.c) : error L2029: '_Rear1' : unresolved external


There were 6 errors detected
del *.obj
Deleting E:\WORK\ROM7188\DEMO\DEMO90\DEMO90.OBJ
     1 file deleted           4,096 bytes freed
del *.map
Deleting E:\WORK\ROM7188\DEMO\DEMO90\DEMO90.MAP
     1 file deleted          28,672 bytes freed