[lld] [LLD] Add CLASS syntax to SECTIONS (PR #95323)

[Peter Smith via llvm-commits]

================
@@ -198,13 +198,52 @@ the current location to a max-page-size boundary, ensuring that the next
 LLD will insert ``.relro_padding`` immediately before the symbol assignment
 using ``DATA_SEGMENT_RELRO_END``.
 
+Section Classes
+~~~~~~~~~~~~~~~
+
+``SECTIONS`` commands can define classes of input sections:
+
+::
+
+  SECTIONS {
+    CLASS(class_name) {
+      input-section-description
+      input-section-description
+      ...
+    }
+  }
+
+Input section descriptions can refer to a class using ``CLASS(class_name)``
+instead of the usual filename and section name patterns. For example:
+
+::
+
+  SECTIONS {
+    CLASS(c) { *(.rodata.earlier) }
----------------
smithp35 wrote:

Can things like SORT and EXCLUDE_FILE be used in the input section descriptions for CLASS? SORT is interesting as the sections in the class could be ordered before attempting to place them in output sections.

https://github.com/llvm/llvm-project/pull/95323