https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92643
--- Comment #3 from Steve Kargl <sgk at troutmask dot apl.washington.edu> --- On Sun, Nov 24, 2019 at 03:59:41AM +0000, kargl at gcc dot gnu.org wrote: > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92643 > > --- Comment #1 from kargl at gcc dot gnu.org --- > % gdb831 ./z > (gdb) run > Starting program: /usr/home/kargl/tmp/z > > Program received signal SIGSEGV, Segmentation fault. > main () at ISO_Fortran_binding_15.c:29 > 29 if (*(int *)dat.base_addr != 42) > > > I think that there is a 32-bit vs 64-bit problem with pointers. > A little more debugging, (gdb) b ISO_Fortran_binding_15.c:29 Breakpoint 1 at 0x804898d: file ISO_Fortran_binding_15.c, line 29. (gdb) run ./z Starting program: /usr/home/kargl/tmp/z ./z Breakpoint 1, main () at ISO_Fortran_binding_15.c:29 29 if (*(int *)dat.base_addr != 42) (gdb) p dat $1 = {base_addr = 0x0, elem_len = 4, version = 1, rank = 0 '\000', attribute = 1 '\001', type = 1025, dim = {{lower_bound = -4200908, extent = 677138155, sm = 1}}} So, we find typedef struct CFI_cdesc_t { void *base_addr; size_t elem_len; int version; CFI_rank_t rank; CFI_attribute_t attribute; CFI_type_t type; CFI_dim_t dim[]; } CFI_cdesc_t; Whoops that 'void *' is likely the problem. sizeof(void *) on i586-*-freebsd is 4; while it is 8 on x86_64-*-amd64. I suspect a missing a "fold_convert(pvoid_type_node,...)"
