When I try to compile cd-hit-2006-0411 under x86_64-suse-linux, I got the following warnins and fatal errors:

g++ -O2 mcd-hit.o cd-hi-class.o -o mcd-hit
/usr/lib64/gcc-lib/x86_64-suse-linux/3.3.3/../../../../x86_64-suse-linux/bin/ld: warning: i386 architecture of input file `mcd-hit.o' is incompatible with i386:x86-64 output
/usr/lib64/gcc-lib/x86_64-suse-linux/3.3.3/../../../../x86_64-suse-linux/bin/ld: warning: i386 architecture of input file `cd-hi-class.o' is incompatible with i386:x86-64 output
mcd-hit.o(.text+0xa25): In function `read_swap_iseq(int, char*)':
: undefined reference to `std::basic_istream<char, std::char_traits<char> >::read(char*, int)'
mcd-hit.o(.text+0xa47): In function `read_swap_iseq(int, char*)':
: undefined reference to `std::basic_istream<char, std::char_traits<char> >::read(char*, int)'
mcd-hit.o(.text+0xa7a): In function `read_swap_iseq(int, char*)':
: undefined reference to `operator new[](unsigned)'
mcd-hit.o(.text+0xa9f): In function `read_swap_iseq(int, char*)':
: undefined reference to `std::basic_istream<char, std::char_traits<char> >::read(char*, int)'
mcd-hit.o(.text+0xc17): In function `read_swap_iseq(int, char*)':
: undefined reference to `std::basic_istream<char, std::char_traits<char> >::read(char*, int)'
mcd-hit.o(.text+0x18ae): In function `main':
: undefined reference to `operator new[](unsigned)'
mcd-hit.o(.text+0x18cb): In function `main':
: undefined reference to `operator new[](unsigned)'
mcd-hit.o(.text+0x18e8): In function `main':
: undefined reference to `operator new[](unsigned)'
mcd-hit.o(.text+0x1905): In function `main':
: undefined reference to `operator new[](unsigned)'
mcd-hit.o(.text+0x191f): In function `main':
: undefined reference to `operator new[](unsigned)'
mcd-hit.o(.text+0x1939): more undefined references to `operator new[](unsigned)' follow
cd-hi-class.o(.text+0x2d83): In function `db_seq_no_test(std::basic_ifstream<char, std::char_traits<char> >&)':
: undefined reference to `std::basic_istream<char, std::char_traits<char> >::read(char*, int)'
cd-hi-class.o(.text+0x2e1a): In function `old_clstr_read_in(std::basic_ifstream<char, std::char_traits<char> >&, int&, int&, int*, int*, int*, char*, int*, int*)':
: undefined reference to `std::basic_istream<char, std::char_traits<char> >::getline(char*, int, char)'
cd-hi-class.o(.text+0x317a): In function `db_read_des(std::basic_ifstream<char, std::char_traits<char> >&, int, int, char**)':
: undefined reference to `std::basic_istream<char, std::char_traits<char> >::getline(char*, int, char)'
cd-hi-class.o(.text+0x327d): In function `db_read_des(std::basic_ifstream<char, std::char_traits<char> >&, int, int, char**)':
: undefined reference to `operator new[](unsigned)'
cd-hi-class.o(.text+0x32e4): In function `db_read_des(std::basic_ifstream<char, std::char_traits<char> >&, int, int, char**)':
: undefined reference to `operator new[](unsigned)'
cd-hi-class.o(.text+0x33b2): In function `db_read_and_write(std::basic_ifstream<char, std::char_traits<char> >&, std::basic_ofstream<char, std::char_traits<char> >&, int, int, char**, int*)':
: undefined reference to `std::basic_istream<char, std::char_traits<char> >::getline(char*, int, char)'
cd-hi-class.o(.text+0x34a4): In function `db_read_and_write(std::basic_ifstream<char, std::char_traits<char> >&, std::basic_ofstream<char, std::char_traits<char> >&, int, int, char**, int*)':
: undefined reference to `operator new[](unsigned)'
cd-hi-class.o(.text+0x35a4): In function `db_read_and_write(std::basic_ifstream<char, std::char_traits<char> >&, std::basic_ofstream<char, std::char_traits<char> >&, int, int, char**, int*)':
: undefined reference to `operator new[](unsigned)'
cd-hi-class.o(.text+0x367d): In function `db_read_in2_old(std::basic_ifstream<char, std::char_traits<char> >&, int, int&, char**, int*, int, int*, int*, int*, int*)':
: undefined reference to `std::basic_istream<char, std::char_traits<char> >::getline(char*, int, char)'
cd-hi-class.o(.text+0x3788): In function `db_read_in2_old(std::basic_ifstream<char, std::char_traits<char> >&, int, int&, char**, int*, int, int*, int*, int*, int*)':
: undefined reference to `operator new[](unsigned)'
cd-hi-class.o(.text+0x3841): In function `db_read_in2_old(std::basic_ifstream<char, std::char_traits<char> >&, int, int&, char**, int*, int, int*, int*, int*, int*)':
: undefined reference to `operator new[](unsigned)'
cd-hi-class.o(.text+0x3c41): In function `db2_seqs_divide_segs(int, int, int*, char**, long long, int, int&, int*, int*)':
: undefined reference to `__divdi3'
cd-hi-class.o(.text+0x3e0c): In function `sort_seqs_divide_segs(int, int, int*, int*, char**, long long, int, int&, int*, int*, char (*) [1280], char*)':
: undefined reference to `operator new[](unsigned)'
cd-hi-class.o(.text+0x3e1e): In function `sort_seqs_divide_segs(int, int, int*, int*, char**, long long, int, int&, int*, int*, char (*) [1280], char*)':
: undefined reference to `operator new[](unsigned)'
cd-hi-class.o(.text+0x413f): In function `sort_seqs_divide_segs(int, int, int*, int*, char**, long long, int, int&, int*, int*, char (*) [1280], char*)':
: undefined reference to `__divdi3'
cd-hi-class.o(.text+0x48f3): In function `old_clstr_seq_no_test(std::basic_ifstream<char, std::char_traits<char> >&)':
: undefined reference to `std::basic_istream<char, std::char_traits<char> >::read(char*, int)'
cd-hi-class.o(.text+0x49c1): In function `db_read_in_lenf(std::basic_ifstream<char, std::char_traits<char> >&, int&, int*)':
: undefined reference to `std::basic_istream<char, std::char_traits<char> >::getline(char*, int, char)'
cd-hi-class.o(.text+0x4b4a): In function `db_read_in_len(std::basic_ifstream<char, std::char_traits<char> >&, int, int&, int*)':
: undefined reference to `std::basic_istream<char, std::char_traits<char> >::getline(char*, int, char)'
cd-hi-class.o(.text+0x4d01): In function `db_read_in_old(std::basic_ifstream<char, std::char_traits<char> >&, int, int&, char**, int*)':
: undefined reference to `std::basic_istream<char, std::char_traits<char> >::getline(char*, int, char)'
cd-hi-class.o(.text+0x4e1a): In function `db_read_in_old(std::basic_ifstream<char, std::char_traits<char> >&, int, int&, char**, int*)':
: undefined reference to `operator new[](unsigned)'
cd-hi-class.o(.text+0x4e7b): In function `db_read_in_old(std::basic_ifstream<char, std::char_traits<char> >&, int, int&, char**, int*)':
: undefined reference to `operator new[](unsigned)'
cd-hi-class.o(.text+0x509f): In function `db_read_in(std::basic_ifstream<char, std::char_traits<char> >&, char*, int, int, int&, char**, int*)':
: undefined reference to `std::basic_istream<char, std::char_traits<char> >::getline(char*, int, char)'
cd-hi-class.o(.text+0x514c): In function `db_read_in(std::basic_ifstream<char, std::char_traits<char> >&, char*, int, int, int&, char**, int*)':
: undefined reference to `std::basic_ostream<char, std::char_traits<char> >::write(char const*, int)'
cd-hi-class.o(.text+0x521e): In function `db_read_in(std::basic_ifstream<char, std::char_traits<char> >&, char*, int, int, int&, char**, int*)':
: undefined reference to `std::basic_ostream<char, std::char_traits<char> >::write(char const*, int)'
cd-hi-class.o(.text+0x523f): In function `db_read_in(std::basic_ifstream<char, std::char_traits<char> >&, char*, int, int, int&, char**, int*)':
: undefined reference to `std::basic_ostream<char, std::char_traits<char> >::write(char const*, int)'
cd-hi-class.o(.text+0x52d1): In function `db_read_in(std::basic_ifstream<char, std::char_traits<char> >&, char*, int, int, int&, char**, int*)':
: undefined reference to `operator new[](unsigned)'
cd-hi-class.o(.text+0x53bf): In function `db_read_in(std::basic_ifstream<char, std::char_traits<char> >&, char*, int, int, int&, char**, int*)':
: undefined reference to `operator new[](unsigned)'
cd-hi-class.o(.text+0x54a0): In function `db_read_in(std::basic_ifstream<char, std::char_traits<char> >&, char*, int, int, int&, char**, int*)':
: undefined reference to `std::basic_ostream<char, std::char_traits<char> >::write(char const*, int)'
cd-hi-class.o(.text+0x54bb): In function `db_read_in(std::basic_ifstream<char, std::char_traits<char> >&, char*, int, int, int&, char**, int*)':
: undefined reference to `std::basic_ostream<char, std::char_traits<char> >::write(char const*, int)'
cd-hi-class.o(.text+0x5842): In function `IDX_TBL::read_tbl(char*)':
: undefined reference to `std::basic_istream<char, std::char_traits<char> >::read(char*, int)'
cd-hi-class.o(.text+0x5865): In function `IDX_TBL::read_tbl(char*)':
: undefined reference to `operator new[](unsigned)'
cd-hi-class.o(.text+0x5880): In function `IDX_TBL::read_tbl(char*)':
: undefined reference to `operator new[](unsigned)'
cd-hi-class.o(.text+0x58ab): In function `IDX_TBL::read_tbl(char*)':
: undefined reference to `std::basic_istream<char, std::char_traits<char> >::read(char*, int)'
cd-hi-class.o(.text+0x58cf): In function `IDX_TBL::read_tbl(char*)':
: undefined reference to `std::basic_istream<char, std::char_traits<char> >::read(char*, int)'
cd-hi-class.o(.text+0x5c4a): In function `read_swap_iseq1(int, char**, char*, int, char*)':
: undefined reference to `std::basic_istream<char, std::char_traits<char> >::read(char*, int)'
cd-hi-class.o(.text+0x5c66): In function `read_swap_iseq1(int, char**, char*, int, char*)':
: undefined reference to `std::basic_istream<char, std::char_traits<char> >::read(char*, int)'
cd-hi-class.o(.text+0x5c80): In function `read_swap_iseq1(int, char**, char*, int, char*)':
: undefined reference to `operator new[](unsigned)'
cd-hi-class.o(.text+0x5ca7): In function `read_swap_iseq1(int, char**, char*, int, char*)':
: undefined reference to `std::basic_istream<char, std::char_traits<char> >::read(char*, int)'
cd-hi-class.o(.text+0x5ffd): In function `IDX_TBL::write_tbl(char*)':
: undefined reference to `std::basic_ostream<char, std::char_traits<char> >::write(char const*, int)'
cd-hi-class.o(.text+0x6026): In function `IDX_TBL::write_tbl(char*)':
: undefined reference to `std::basic_ostream<char, std::char_traits<char> >::write(char const*, int)'
cd-hi-class.o(.text+0x604a): In function `IDX_TBL::write_tbl(char*)':
: undefined reference to `std::basic_ostream<char, std::char_traits<char> >::write(char const*, int)'
cd-hi-class.o(.text+0x63fb): In function `db_read_in2(std::basic_ifstream<char, std::char_traits<char> >&, char*, int, int, int&, char**, int*, int, int*, int*, int*, int*)':
: undefined reference to `std::basic_istream<char, std::char_traits<char> >::getline(char*, int, char)'
cd-hi-class.o(.text+0x64eb): In function `db_read_in2(std::basic_ifstream<char, std::char_traits<char> >&, char*, int, int, int&, char**, int*, int, int*, int*, int*, int*)':
: undefined reference to `std::basic_ostream<char, std::char_traits<char> >::write(char const*, int)'
cd-hi-class.o(.text+0x6506): In function `db_read_in2(std::basic_ifstream<char, std::char_traits<char> >&, char*, int, int, int&, char**, int*, int, int*, int*, int*, int*)':
: undefined reference to `std::basic_ostream<char, std::char_traits<char> >::write(char const*, int)'
cd-hi-class.o(.text+0x6656): In function `db_read_in2(std::basic_ifstream<char, std::char_traits<char> >&, char*, int, int, int&, char**, int*, int, int*, int*, int*, int*)':
: undefined reference to `std::basic_ostream<char, std::char_traits<char> >::write(char const*, int)'
cd-hi-class.o(.text+0x6749): In function `db_read_in2(std::basic_ifstream<char, std::char_traits<char> >&, char*, int, int, int&, char**, int*, int, int*, int*, int*, int*)':
: undefined reference to `std::basic_ostream<char, std::char_traits<char> >::write(char const*, int)'
cd-hi-class.o(.text+0x676a): In function `db_read_in2(std::basic_ifstream<char, std::char_traits<char> >&, char*, int, int, int&, char**, int*, int, int*, int*, int*, int*)':
: undefined reference to `std::basic_ostream<char, std::char_traits<char> >::write(char const*, int)'
cd-hi-class.o(.text+0x6812): In function `db_read_in2(std::basic_ifstream<char, std::char_traits<char> >&, char*, int, int, int&, char**, int*, int, int*, int*, int*, int*)':
: undefined reference to `operator new[](unsigned)'
cd-hi-class.o(.text+0x68ce): In function `db_read_in2(std::basic_ifstream<char, std::char_traits<char> >&, char*, int, int, int&, char**, int*, int, int*, int*, int*, int*)':
: undefined reference to `operator new[](unsigned)'
/usr/lib64/gcc-lib/x86_64-suse-linux/3.3.3/../../../../x86_64-suse-linux/bin/ld: BFD 2.15.90.0.1.1 20040303 (SuSE Linux) internal error, aborting at ../../bfd/reloc.c line 4274 in bfd_generic_get_relocated_section_contents

/usr/lib64/gcc-lib/x86_64-suse-linux/3.3.3/../../../../x86_64-suse-linux/bin/ld: Please report this bug.

Does anybody else tried to compile on this architecture before ?