cmake: Toolchain abstraction: move symbol sorting into toolchain_ld_base

No functional change expected.

This is motivated by the wish to abstract Zephyr's usage of toolchains,
permitting non-intrusive porting to other (commercial) toolchains.

Signed-off-by: Mark Ruvald Pedersen <mped@oticon.com>

CMakeLists.txt

@@ -376,14 +376,6 @@ if(CONFIG_USERSPACE)
   endif()
 endif()
 
-# Sort the common symbols and each input section by alignment
-# in descending order to minimize padding between these symbols.
-zephyr_ld_option_ifdef(
-  CONFIG_LINKER_SORT_BY_ALIGNMENT
-  ${LINKERFLAGPREFIX},--sort-common=descending
-  ${LINKERFLAGPREFIX},--sort-section=alignment
-  )
-
 get_property(TOPT GLOBAL PROPERTY TOPT)
 set_ifndef(  TOPT -Wl,-T) # clang doesn't pick -T for some reason and complains,
                           # while -Wl,-T works for both, gcc and clang

cmake/linker/ld/target_base.cmake

@@ -12,4 +12,12 @@ macro(toolchain_ld_base)
     ${LINKERFLAGPREFIX},--build-id=none
   )
 
+  # Sort the common symbols and each input section by alignment
+  # in descending order to minimize padding between these symbols.
+  zephyr_ld_option_ifdef(
+    CONFIG_LINKER_SORT_BY_ALIGNMENT
+    ${LINKERFLAGPREFIX},--sort-common=descending
+    ${LINKERFLAGPREFIX},--sort-section=alignment
+  )
+
 endmacro()