https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81968
--- Comment #17 from rguenther at suse dot de <rguenther at suse dot de> --- On September 15, 2017 5:02:36 PM GMT+02:00, "ro at CeBiTec dot Uni-Bielefeld.DE" <gcc-bugzi...@gcc.gnu.org> wrote: >https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81968 > >--- Comment #16 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec >dot Uni-Bielefeld.DE> --- >> --- Comment #14 from Richard Biener <rguenth at gcc dot gnu.org> --- >> Thanks for the detailed analysis. Indeed >> >> /* Mark sections as preserved that are required by to be preserved >> sections. */ >> for (i = 1; i < shnum; ++i) >> { >> ... >> if (sh_type == SHT_SYMTAB) >> { >> /* Mark strings sections of copied symtabs. */ >> if (pfnret[i - 1] == 0) >> pfnret[sh_link - 1] = 0; >> } >> } >> >> so it conditionally preserves sh_link of SHT_SYMTAB. >> >> I think we need to iterate this loop. And maybe always preserve the >symtab >> since we keep exported symbols of preserved sections, we're currently >lucky >> here because .debug_info always contains a relocation to >.debug_abbrev. >> Probably good enough... > >That worked just fine, thanks. > >While there are still ld warnings > >ld: warning: file /var/tmp//ccmgPmhadebugobjtem: section [2] has >invalid type [ >SHT_NULL ] > >ro@lucy 87 > elfdump -c -I 2 cc2qd7lbdebugobjtem >cc2qd7lbdebugobjtem: : invalid sh_type: 0 > >Section Header[2]: sh_name: > sh_addr: 0 sh_flags: [ SHF_EXCLUDE ] > sh_size: 0 sh_type: [ SHT_NULL ] > sh_offset: 0x4980 sh_entsize: 0 > sh_link: 0 sh_info: 0 > sh_addralign: 0x10 > >and there's no way to silence them from the ld command line, I should >be >able to prune them for the testsuite at least. Can you report this issue to the Solaris folks? However, the final link >fails: > >Undefined first referenced > symbol in file >__gnu_lto_v1 /var/tmp//ccQylLjddebugobj > >It turns out that __gnu_lto_v1 in the original object > >[336] 0x1 0x1 OBJT GLOB D 0 COMMON >__gnu_lto_v1 > >remains in the one produced by lto-wrapper: > > [339] 0 0 NOTY GLOB D 0 UNDEF __gnu_lto_v1 > >Need to check what's going on here... How does it fail? The symbol should be unused... Richard. > Rainer
