/tmp/ccS3m4te.o: In function `main':
foo.cc:(.text.startup+0x150): undefined reference to `SeqList::~SeqList()'
foo.cc:(.text.startup+0x158): undefined reference to `SeqList::~SeqList()'
foo.cc:(.text.startup+0x177): undefined reference to `SeqList::~SeqList()'
foo.cc:(.text.startup+0x17f): undefined reference to `SeqList::~SeqList()'
collect2: error: ld returned 1 exit status