how to create library

i have written a simple UART code, my project is entirely depends upon the serial comunnication.

i have to control 4 to 5 stepper motor and sensor, for which lot of subroutines r to be written,
i wanted to make small library which are classified into motor,uart,sensor codes .

now i have written a simple test code for my project, it is working fine when i write all the code in one C file.

when i am tring to modularized the code compiler shows 0 errors but 10 warnings.

*** WARNING L1: UNRESOLVED EXTERNAL SYMBOL
    SYMBOL:  SYSTEM_INIT
    MODULE:  D:\SWAPNIL_PROJECT\S.O.A.M_30112010\CODE\VERSION2\SOAM_12112010\K
>> EIL2\TEST1.OBJ (TEST1)

*** WARNING L1: UNRESOLVED EXTERNAL SYMBOL
    SYMBOL:  PORT_IO_INIT
    MODULE:  D:\SWAPNIL_PROJECT\S.O.A.M_30112010\CODE\VERSION2\SOAM_12112010\K
>> EIL2\TEST1.OBJ (TEST1)

*** WARNING L1: UNRESOLVED EXTERNAL SYMBOL
    SYMBOL:  _UART1_TX
    MODULE:  D:\SWAPNIL_PROJECT\S.O.A.M_30112010\CODE\VERSION2\SOAM_12112010\K
>> EIL2\TEST1.OBJ (TEST1)

*** WARNING L1: UNRESOLVED EXTERNAL SYMBOL
    SYMBOL:  UART1_INIT
    MODULE:  D:\SWAPNIL_PROJECT\S.O.A.M_30112010\CODE\VERSION2\SOAM_12112010\K
>> EIL2\TEST1.OBJ (TEST1)

*** WARNING L1: UNRESOLVED EXTERNAL SYMBOL
    SYMBOL:  _DELAY
    MODULE:  D:\SWAPNIL_PROJECT\S.O.A.M_30112010\CODE\VERSION2\SOAM_12112010\K
>> EIL2\TEST1.OBJ (TEST1)

*** WARNING L2: REFERENCE MADE TO UNRESOLVED EXTERNAL
    SYMBOL:  SYSTEM_INIT
    MODULE:  D:\SWAPNIL_PROJECT\S.O.A.M_30112010\CODE\VERSION2\SOAM_12112010\K
>> EIL2\TEST1.OBJ (TEST1)
    ADDRESS: 0090H

*** WARNING L2: REFERENCE MADE TO UNRESOLVED EXTERNAL
    SYMBOL:  UART1_INIT
    MODULE:  D:\SWAPNIL_PROJECT\S.O.A.M_30112010\CODE\VERSION2\SOAM_12112010\K
>> EIL2\TEST1.OBJ (TEST1)
    ADDRESS: 0093H

*** WARNING L2: REFERENCE MADE TO UNRESOLVED EXTERNAL
    SYMBOL:  PORT_IO_INIT
    MODULE:  D:\SWAPNIL_PROJECT\S.O.A.M_30112010\CODE\VERSION2\SOAM_12112010\K
>> EIL2\TEST1.OBJ (TEST1)
    ADDRESS: 0096H
BL51 BANKED LINKER/LOCATER V6.11            11/15/2010  17:19:25  PAGE 3



*** WARNING L2: REFERENCE MADE TO UNRESOLVED EXTERNAL
    SYMBOL:  _DELAY
    MODULE:  D:\SWAPNIL_PROJECT\S.O.A.M_30112010\CODE\VERSION2\SOAM_12112010\K
>> EIL2\TEST1.OBJ (TEST1)
    ADDRESS: 00A0H

*** WARNING L2: REFERENCE MADE TO UNRESOLVED EXTERNAL
    SYMBOL:  _UART1_TX
    MODULE:  D:\SWAPNIL_PROJECT\S.O.A.M_30112010\CODE\VERSION2\SOAM_12112010\K
>> EIL2\TEST1.OBJ (TEST1)
    ADDRESS: 00ADH

Program Size: data=17.0 xdata=0 code=198
LINK/LOCATE RUN COMPLETE.  10 WARNING(S),  0 ERROR(S)

please help me understand where i am going wrong

More questions in this forum