https://sourceware.org/bugzilla/show_bug.cgi?id=18837
--- Comment #3 from Richard Guenther <rguenth at gcc dot gnu.org> ---
(In reply to Cary Coutant from comment #2)
> Let's use PR 18836 for a broader discussion on the topic of LTO and early
> debug.
>
> With the given script, Gnu ld will link t.o as if it had been named on the
> command line. Gold will not; we treat the filenames (with or without
> wildcards) as filters, and gold will not link a file unless it's given on
> the command line or in an INPUT command in a linker script.
>
> In addition, gold does not support partial linker scripts. If you have a
> linker script with a SECTIONS clause, you'll need to provide a complete
> description of the output section, or the final output will almost certainly
> not be usable.
I see. So I'm trying (same input):
SECTIONS {
.debug_info 0 : { *(.gnu.lto_.debug_info*) }
.debug_abbrev 0 : { *(.gnu.lto_.debug_abbrev*) }
.debug_str 0 : { *(.gnu.lto_.debug_str*) }
/DISCARD/ : { *(*) }
}
> ld.gold -o x -T script t.o -r
Segmentation fault
> ld.gold -o x -T script t.o
t.o: plugin needed to handle lto object
ld.gold: internal error in address, at ../../gold/output.h:72
(ok, only the -r link is relevant in the end)
GNU ld:
> ld -o x -T script t.o -r
ld: t.o: plugin needed to handle lto object
> readelf -S x
There are 8 section headers, starting at offset 0x1a0:
Section Headers:
[Nr] Name Type Address Offset
Size EntSize Flags Link Info Align
[ 0] NULL 0000000000000000 00000000
0000000000000000 0000000000000000 0 0 0
[ 1] .debug_info PROGBITS 0000000000000000 00000040
000000000000000a 0000000000000000 E 0 0 1
[ 2] .rela.debug_info RELA 0000000000000000 00000188
0000000000000018 0000000000000018 I 6 1 8
[ 3] .debug_abbrev PROGBITS 0000000000000000 0000004a
0000000000000001 0000000000000000 E 0 0 1
[ 4] .debug_str PROGBITS 0000000000000000 0000004b
000000000000001e 0000000000000001 MS 0 0 1
[ 5] .shstrtab STRTAB 0000000000000000 00000069
0000000000000045 0000000000000000 0 0 1
[ 6] .symtab SYMTAB 0000000000000000 000000b0
00000000000000a8 0000000000000018 7 4 8
[ 7] .strtab STRTAB 0000000000000000 00000158
000000000000002a 0000000000000000 0 0 1
maybe you can help me writing a linker script that works with GOLD and
a partial link (and also suggest how to drop the 'E'xclude bit during
that link)? golds "error" messages are not exactly helpful :/
Btw, this is gold from the 2.25 branch head.
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