I applied the following patch (approved in the PR thread) to fix this
in trunk.
It should also be applied to 4.6.x at some stage.
cheers
Iain
gcc/
PR target/47997
* config/darwin.c (darwin_mergeable_string_section): Place string
constants in '.cstring' rather than '.const' when CF/NSStrings are
active.
Index: gcc/config/darwin.c
===================================================================
--- gcc/config/darwin.c (revision 175409)
+++ gcc/config/darwin.c (working copy)
@@ -1195,7 +1195,11 @@ static section *
darwin_mergeable_string_section (tree exp,
unsigned HOST_WIDE_INT align)
{
- if (flag_merge_constants
+ /* Darwin's ld expects to see non-writable string literals in
the .cstring
+ section. Later versions of ld check and complain when CFStrings
are
+ enabled. Therefore we shall force the strings into .cstring
since we
+ don't support writable ones anyway. */
+ if ((darwin_constant_cfstrings || flag_merge_constants)
&& TREE_CODE (exp) == STRING_CST
&& TREE_CODE (TREE_TYPE (exp)) == ARRAY_TYPE
&& align <= 256
