http://sourceware.org/bugzilla/show_bug.cgi?id=12320
Summary: ld --as-needed links libgcc_s.so.1 unnecessarily on
Solaris 11
Product: binutils
Version: 2.21
Status: NEW
Severity: normal
Priority: P2
Component: ld
AssignedTo: unassig...@sources.redhat.com
ReportedBy: r...@techfak.uni-bielefeld.de
Host: i386-pc-solaris2.11
Target: i386-pc-solaris2.11
Build: i386-pc-solaris2.11
While trying to make the libgcc unwinder use dl_iterate_phdr on Solaris 11, I
ran
into the fact that gld 2.21 unnecessarily links libgcc_s.so.1 into even a
trivial
program if USE_LD_AS_NEEDED is defined in gcc/config/sol2.h.
The problem can be shown with the following trivial example, even stripping
down
the usual ld invocation:
$ cat main.c
int main (void) { return (0); }
$ gcc -c main.c
$ gld-2.21 -o main /usr/lib/crt1.o /usr/lib/crti.o -L. main.o -lgcc --as-needed
-lgcc_s --no-as-needed -lc
$ ldd -u main
libgcc_s.so.1 => /usr/lib/libgcc_s.so.1
libc.so.1 => /lib/libc.so.1
libm.so.2 => /lib/libm.so.2
unused object=/usr/lib/libgcc_s.so.1
I have no idea why ld thinks it needs to use libgcc_s.so.1 and have found no
way
to trace this down.
This unnecessary linking is causing serious trouble, especially since
libgcc_s.so.1
isn't available in the regular ld.so.1 search patch on Solaris 11.
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