jwp@chem.ucsd.edu (John Pierce) (05/14/88)
On various Sys V related f77 compilers, including a 3B/15, the f77 compiler generates unlinkable code for the following source (original problem much reduced): subroutine op1() character*80 help integer result read(help,*) result end The loader complaint is: test.f: op1: undefined first referenced symbol in file s_rsli test.o e_rsli test.o MAIN__ /usr/lib/libF77.a ld fatal: Symbol referencing errors. No output written to a.out The problem is that 's_rsli' and 'e_rsli' do not, but obviously should, exist in the Sys V library even though the compiler generates calls to them. This problem does not exist in BSD f77. In case anyone cares, the assembly language output for the above source (for a 3B/15) is .file "test.f" .data .align 4 .L16: .word 3 .align 4 .L17: .word 1 .bss v.1,80,4 .bss v.3,4,4 .data .data .globl op1_ .globl s_rsli .globl do_lio .globl e_rsli .align 4 .data v.2: .word 0 .word v.1 .word 0 .word 0 .word 80 .word 1 .zero 4 .text .align 4 op1_: save &.R1 addw2 &.F1,%sp jmp .L13 .L14: pushw &v.2 call &1,s_rsli pushaw .L16 pushaw .L17 pushw &v.3 pushw &4 call &4,do_lio call &0,e_rsli .L12: .L11: .set .R1,0 ret &0 .set .FSP1,4 .L13: .set .F1,0+.FSP1 jmp .L14 .text -- John Pierce Chemistry, B-032, UCSD, La Jolla, CA 92093 jwp@chem.ucsd.edu jwpierce@ucsd +1 619 534 0203