C-ISAM link with gcc 2.7.2 on AIX4.1.5

Environment o AIX 4.1.5 (RS6k) o gcc version 2.7.2 o GNU assembler version 2.7 (powerpc-ibm-aix4.1.5.0), using BFD version 2.7 o ld version 2.7 (with BFD 2.7) o C-ISAM v7.2 Does anyone have experience with compiling C-ISAM files with the above configuration ? I this when I try to link. TIA Ian cc go.o customer.o -o go -lisam /usr/local/lib/libisam.a(gvalid.o)(.pr+0x264):gvalid.c: undefined reference to ` __mulh' /usr/local/lib/libisam.a(gvalid.o)(.pr+0x288):gvalid.c: undefined reference to ` __mulh' /usr/local/lib/libisam.a(gvalid.o)(.pr+0x2e4):gvalid.c: undefined reference to ` __mulh' /usr/local/lib/libisam.a(gvalid.o)(.pr+0x324):gvalid.c: undefined reference to ` __mulh' /usr/local/powerpc-ibm-aix4.1.5.0/bin/ld: gvalid.o: loader reloc in read-only se ction .text /usr/local/powerpc-ibm-aix4.1.5.0/bin/ld: final link failed: Invalid operation make: *** [go] Error 1