[Bug gold/13577] New: Gold linker does not respect --dynamic-list option

[krf at gmx dot de]

http://sourceware.org/bugzilla/show_bug.cgi?id=13577

             Bug #: 13577
           Summary: Gold linker does not respect --dynamic-list option
           Product: binutils
           Version: 2.21
            Status: NEW
          Severity: normal
          Priority: P2
         Component: gold
        AssignedTo: address@hidden
        ReportedBy: address@hidden
                CC: address@hidden
    Classification: Unclassified


Created attachment 6154
  --> http://sourceware.org/bugzilla/attachment.cgi?id=6154
Test case

We encountered some problems with regards to symbols not being relocatable in
DSOs.

The shared libraries in our case are compiled with -Bsymbolic-functions turned
on. To avoid that certain symbols are bound to the definition within the shared
library we specificy the --dynamic-list option. This seems to work fine when
ld.bfd is used, but does seem to be ignored when ld.gold is used instead.

I've attached a small test case showing the issue. There is the source file
libtest.cpp containing an symbol "foo" which in turn is called by "test_foo".
The symbol "foo" is supposed to be relocatable even if compiled with
-Bsymbolic. To achieve this --dynamic-list is passed, pointing to a file which
declares "foo" global.

When ld.bfd is in use, the resulting libtestsym.so (which is compiled with
-Bsymbolic-functions -Wl,--dynamic-list=libtest_syms.txt) contains a symbol
"foo" which is relocatable (checked with "objdump -D libtestsym.so | grep foo |
grep plt").
When being linked by ld.gold, however, "foo" in libtestsym.so does not seem to
be relocatable, as seen by the missing .PLT entry for "foo".

I'm attaching the test case + command line sequence to show this problem.

Note: I've also tested with latest trunk version of gold, still did not work.

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