[Bug target/80556] [8 Regression] bootstrap failure for Ada compiler

[iains at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80556

--- Comment #59 from Iain Sandoe <iains at gcc dot gnu.org> ---
Author: iains
Date: Mon Sep 25 08:47:41 2017
New Revision: 253137

URL: https://gcc.gnu.org/viewcvs?rev=253137&root=gcc&view=rev
Log:
[Patch, Darwin] Fix PR80556 by linking the system unwinder ahead of libgcc_eh.

        PR target/80556
        * config/i386/darwin.h (REAL_LIB_SPEC): New; put libSystem ahead
        of libgcc_eh for m64.
        * config/i386/darwin64.h: Likewise.

/* WORKAROUND pr80556:
   For x86_64 Darwin10 and later, the unwinder is in libunwind (redirected
   from libSystem).  This doesn't use the keymgr (see keymgr.c) and therefore
   the calls that libgcc makes to obtain the KEYMGR_GCC3_DW2_OBJ_LIST are not
   updated to include new images, and might not even be valid for a single
   image.
   Therefore, for 64b exes at least, we must use the libunwind implementation,
   even when static-libgcc is specified.  We put libSystem first so that
   unwinder symbols are satisfied from there. 



Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/i386/darwin.h
    trunk/gcc/config/i386/darwin64.h