Linking problem ...

Hello,
I'm using gcc 4.4.5 and EMC 2.4.6,
Impossible to link my program ... see below undefined function !
I'm using others functions without problem ... (sendProgramOpen(char *), sendProgramRun(int Line), sendProgramPause() ...)
Also, I searched these function in EMC tree structure without success ?!

undefined reference to `sendLoadToolTable(char*)'
undefined reference to `loadToolTable'
undefined reference to `sendMdiCmd(char*)'
undefined reference to `sendMdiCmd(char*)'
undefined reference to `taskMotionLine'
undefined reference to `taskMotionLine'

Have you an idea ?
Thanks.

Sorry !
I found the problem ... (const char *) instead of (char *) and cast problem ...