[root@ns sistestlinux]# gcc testmain.cpp CSISClient.cpp CSISClientSession.cpp /free/home/mobile/html/pk/sis/sistestlinux/md5/md5.c
/tmp/ccwldY49.o: In function `NewSession(void *)':
/tmp/ccwldY49.o(.text+0x28): undefined reference to `pthread_detach'
/tmp/ccwldY49.o: In function `CSISClient::Connect(int)':
/tmp/ccwldY49.o(.text+0x28f): undefined reference to `pthread_create'
/usr/lib/gcc-lib/i386-redhat-linux/2.96/libgcc.a(_eh.o)(.data+0x0): undefined reference to `pthread_create'
/usr/lib/gcc-lib/i386-redhat-linux/2.96/libgcc.a(frame-dwarf2.o): In function `decode_uleb128':