diff options
Diffstat (limited to 'ld/ld.texinfo')
| -rw-r--r-- | ld/ld.texinfo | 17 |
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, |