[Bug libffi/47248] libffi build failure with ld.gold (works with trunk 20110106, fails with 20110110)

[ian at airs dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47248

Ian Lance Taylor <ian at airs dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2011.01.10 21:44:26
          Component|bootstrap                   |libffi
     Ever Confirmed|0                           |1

--- Comment #2 from Ian Lance Taylor <ian at airs dot com> 2011-01-10 21:44:26 UTC ---
This problem is occurring because the file sysv.o has a writable .eh_frame
section.  That is confusing gold's relro support.  This is certainly a bug in
gold.  However, there does also seem to be a problem in libffi.  Why is the
libffi configure.ac setting EH_FRAME_FLAGS to "aw"?

As far as I can see, the test in libffi/configure.ac is bogus.  It is compiling
code and looking for the setting of the .eh_frame section.  However, the code
it is compiling has no need to handle exceptions and therefore has no .eh_frame
section.  The configure script draws the wrong conclusion and emits a writable
.eh_frame section when it should emit a readable one.  This should be fixed
independently of the gold problem.