iar: linker_script: Parse LD style INPUT specifications

Add support for LD-style file specifications in the
IAR generator for
`zephyr_linker_section_configure(INPUT`

Signed-off-by: Robin Kastberg <[email protected]>

Author: RobinKastberg

cmake/linker/iar/config_file_script.cmake

@@ -613,9 +613,6 @@ function(section_to_string)
 
     if(keep)
       list(APPEND to_be_kept "block ${name_clean}_${idx}")
-      foreach(setting ${input})
-        list(APPEND to_be_kept "section ${setting}")
-      endforeach()
     endif()
     # In ilink if a block with min_size=X  does not match any input sections,
     # its _init block may be discarded despite being needed for spacing with
@@ -740,8 +737,27 @@ function(section_to_string)
 
       set(section_type "")
 
-      set(TEMP "${TEMP}${section_type} ${part}section ${setting}")
-      set_property(GLOBAL APPEND PROPERTY ILINK_CURRENT_SECTIONS "section ${setting}")
+      # Setting may have file-pattern or not.
+      #   <file-pattern>(<section-patterns>... )
+      #   <file-pattern> is [library.a:]file
+      #   e.g. foo.a:bar.o(.data*)
+      if(setting MATCHES "^([^\\(]+)\\((.+)\\)$")
+        set(file_pattern "${CMAKE_MATCH_1}")
+        set(section_pattern "${CMAKE_MATCH_2}")
+
+        # This contains library:object specification.
+        # This is translated from LD lib.a:obj.o to IARs obj.o(lib.a).
+        if(file_pattern MATCHES "^([^:]+):(.+)$")
+          set(file_pattern "${CMAKE_MATCH_2}(${CMAKE_MATCH_1})")
+        endif()
+        set(pattern "section ${section_pattern} object ${file_pattern}")
+      else()
+        set(pattern "section ${setting}")
+      endif()
+
+      set(TEMP "${TEMP}${section_type} ${part} ${pattern}")
+      set_property(GLOBAL APPEND PROPERTY ILINK_CURRENT_SECTIONS "${pattern}")
+
       set(section_type "")
 
       if("${setting}" STREQUAL "${last_input}")
@@ -750,6 +766,10 @@ function(section_to_string)
         set(TEMP "${TEMP}, ")
       endif()
 
+      if(keep)
+        list(APPEND to_be_kept "${pattern}")
+      endif()
+
       # set(TEMP "${TEMP}\n    *.o(${setting})")
     endforeach()