Re: Linking Error

[N. Shamsundar]

archna.mittal@gmail.com wrote:
> Hi,
>   I am a new to the makefile world. I am trying to write a makefile
> which consists of two files,but at the compilation time it is giving me
> linking error. I do have a feeling that it is makefile error.
>
> /******Makefile***********/
> LOCAL_OBJS=DecryptApi.o TESTDRV.o
>
> TESTDRV: $(LOCAL_OBJS)
>          arm-linux-gcc -o TESTDRV TESTDRV.o DecryptApi.o -L. -lsddklib
>
> TESTDRV.o:TESTDRV.C
>         arm-linux-gcc -g -c TESTDRV.C
>
> DecryptApi.o:DecryptApi.C
>         arm-linux-gcc -g -c DecryptApi.C
> /**********End of Makefile*****************/
>
>
>
> After compling I recieve the error:
>
> /***********************************************************/
> arm-linux-gcc -o TESTDRV TESTDRV.o DecryptApi.o -L. -lsddklib
> TESTDRV.o: In function `main':
> /home/amittal/CPRM/TESTDRV.C:51: undefined reference to
> `NMSecure::NMSec_init(void)'
> /home/amittal/CPRM/TESTDRV.C:60: undefined reference to
> `NMSecure::NMSec_deinit(void)'
> /home/amittal/CPRM/TESTDRV.C:63: undefined reference to
> `NMSecure::NMSec_deinit(void)'
> TESTDRV.o: In function `secTest(NMSecure *)':
> /home/amittal/CPRM/TESTDRV.C:208: undefined reference to
> `NMSecure::NMSec_fopen(char *, unsigned char)'
> /home/amittal/CPRM/TESTDRV.C:255: undefined reference to
> `NMSecure::NMSec_fread(short, unsigned char *, unsigned short)'
> /home/amittal/CPRM/TESTDRV.C:299: undefined reference to
> `NMSecure::NMSec_fclose(short)'
> collect2: ld returned 1 exit status
> make: *** [TESTDRV] Error 1
> /**********************************************************/
>
>
> While all these functions (NMSec_init(void),NMSec_deinit(void)) are
> defined in
> DecryptApi.C.
>
> Any pointers are highly appreciated.
>
> Thanks in Advance,
> Regards,
> -Archna
The Unix linker convention is to refer to libxyz.a as "-lxyz". Thus, 
your makefile should say

          arm-linux-gcc -o TESTDRV TESTDRV.o DecryptApi.o -L. -lsddk

instead of

          arm-linux-gcc -o TESTDRV TESTDRV.o DecryptApi.o -L. -lsddklib

N. Shamsundar
University of Houston