cannot find -lposix4

Code:

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g++ program.cc -lposix4 -lpthre
/usr/lib/gcc-lib/i586-suse-linux/3.3.1/../../../../i586-suse-linux/bin/ld: cannot find -lposix4
collect2: ld returned 1 exit status

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I assume I probably need to get this lposix4 from the suse site... but I just wanted to see if anyone had come across it before and had any suggestions. Thank you.