https://sourceware.org/bugzilla/show_bug.cgi?id=33485
Bug ID: 33485
Summary: ar: Maps in a.out thin archives missing symbols for
subsequent members
Product: binutils
Version: unspecified
Status: NEW
Severity: normal
Priority: P2
Component: binutils
Assignee: unassigned at sourceware dot org
Reporter: macro at orcam dot me.uk
Target Milestone: ---
Target: i[3-7]86-*-bsd* i[3-7]86-*-msdos* pdp11-*-*
For i386 and PDP-11 a.out targets given these sources and recipe:
$ cat a.s
.data
.globl aa
aa:
.dc.a bb
$ cat b.s
.data
.globl bb
bb:
.dc.a aa
$ as -o a.o a.s
$ as -o b.o b.s
$ ar rcT abt.a a.o b.o
$
an archive is produced that only has symbols from a.o in the map:
$ nm --print-armap abt.a
Archive index:
aa in tmpdir/a.o
bb
tmpdir/a.o:
00000000 D aa
U bb
tmpdir/b.o:
U aa
00000000 D bb
$
The same recipe works for all other targets, producing correct contents,
e.g.:
$ i386-linux-nm abt.a
Archive index:
aa in tmpdir/a.o
bb in tmpdir/b.o
tmpdir/a.o:
00000000 D aa
U bb
tmpdir/b.o:
U aa
00000000 D bb
$
Consistently, the archive also fails link:
$ cat abc.s
.text
.globl ff
ff:
.data
.globl cc
cc:
.dc.a aa, bb
$ as -o abc.o abc.s
$ ld -o abtc -e ff abc.o abt.a
ld: abt.a: error adding symbols: no more archived files
$
Here it works for most other targets, except for Alpha/ECOFF ones which
fail for another reason.
I've examined the state as at commit a8da6403829d ("Add support for thin
archives.") and it produced the same results, so it's not a regression
and thin archives have never worked for these a.out targets.
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