PR ld/12356

	* ld.texinfo (Miscellaneous Commands): Describe LD_FEATURE.
	(Expression Section): Update.
	* ld.h (ld_config_type): Add sane_expr.
	* ldgram.y (ifile_p1): Add LD_FEATURE.
	* ldlex.l (LD_FEATYRE): New.
	* ldemul.c (after_parse_default): Delete code handling ld_compatibility.
	* ldexp.h (struct ldexp_control): Delete uses_defined.
	* ldexp.c: Remove all uses of uses_defined.
	(fold_name): Test config.sane_expr rather than ld_compatibility.
	(exp_fold_tree_1): Likewise.  Adjust handling of assignments
	during first phase.
	* ldlang.h (ld_compatibility): Delete.
	(lang_ld_feature): Declare.
	* ldlang.c (ld_compatibility): Delete.
	(open_input_bfds): Only handle assignments for --defsym.
	(lang_ld_feature): New function.

1 files changed, 12 insertions, 5 deletions

diff --git a/ld/ld.texinfo b/ld/ld.texinfo
index d4419aa..51569b1 100644
--- a/ld/ld.texinfo
+++ b/ld/ld.texinfo
@@ -3344,6 +3344,13 @@ of the names used by the BFD library (@pxref{BFD}).  You can see the
 architecture of an object file by using the @code{objdump} program with
 the @samp{-f} option.
 @end ifclear
+
+@item LD_FEATURE(@var{string})
+@kindex LD_FEATURE(@var{string})
+This command may be used to modify @command{ld} behavior.  If
+@var{string} is @code{"SANE_EXPR"} then absolute symbols and numbers
+in a script are simply treated as numbers everywhere.
+@xref{Expression Section}.
 @end table
 
 @node Assignments
@@ -5503,15 +5510,15 @@ section relative symbols and for builtin functions that return an
 address, such as @code{ADDR}, @code{LOADADDR}, @code{ORIGIN} and
 @code{SEGMENT_START}.  Other terms are simply numbers, or are builtin
 functions that return a non-address value, such as @code{LENGTH}.
-One complication is that unless you assign @code{__ld_compatibility}
-a value of 221 or larger, numbers and absolute symbols are treated
+One complication is that unless you set @code{LD_FEATURE ("SANE_EXPR")}
+(@pxref{Miscellaneous Commands}), numbers and absolute symbols are treated
 differently depending on their location, for compatibility with older
 versions of @code{ld}.  Expressions appearing outside an output
 section definition treat all numbers as absolute addresses.
 Expressions appearing inside an output section definition treat
-absolute symbols as numbers.  If @code{__ld_compatibility} is assigned
-a value larger than 221, then absolute symbols and numbers are simply
-treated as numbers everywhere.
+absolute symbols as numbers.  If @code{LD_FEATURE ("SANE_EXPR")} is
+given, then absolute symbols and numbers are simply treated as numbers
+everywhere.
 
 In the following simple example,