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Old 11-27-2007, 10:32 PM   #1
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Registered: Nov 2007
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Post Problem while cross compiling

While cross compiling my application for arm9 I am getting following messages:

/root/arm/g2/fw/lib/core/mq.c:74: undefined reference to `mq_unlink'
/fw/lib/core/mq.c:82: undefined reference to `mq_open'
/fw/lib/core/mq.c:87: undefined reference to `mq_open'
/root/arm/g2/fw/lib/core/mq.c:101: undefined reference to `mq_close'
/fw/lib/core/mq.c:102: undefined reference to `mq_close'
/root/arm/g2/fw/lib/core/mq.c:120: undefined reference to `mq_send'
/root/arm/g2/fw/lib/core/mq.c:140: undefined reference to `mq_receive'
/root/arm/g2/fw/lib/core/mq.c:158: undefined reference to `mq_timedreceive'
/root/arm/g2/fw/lib/core/mq.c:187: undefined reference to `mq_getattr'
/root/arm/g2/fw/lib/core/mq.c:204: undefined reference to `mq_unlink'
collect2: ld returned 1 exit status

My makefile has -lrt library included while gcc since message queue related implementation present in librt.a libraray. and Also the library path is set in $PATH variable.

Can anyone tell me the cause for this issue, so that I am able to debug I have tried all possiblity arround.

If library is compile for another platform and the application code if I compile with anothet platform would this error occur.

Kindly help me.

Old 03-05-2008, 08:58 AM   #2
Registered: Dec 2005
Distribution: just replace windows with linux
Posts: 38

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please post your makefile next time.

I assume that are using glibc with mq support.

make a small test prg that uses one off the mq_xxx an try that
1. on your host
2. in your cross compile env


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