fw: tell linker to add init_array to ctor section

Starting with version 4.8, gcc places functions
with __attribute__ ((constructor)) in .init_array
instead of .ctors by default.

This broke firmware images built with gcc >= 4.8.

Signed-off-by: Steve Markgraf <steve@steve-m.de>

src/target/firmware/board/compal/highram.lds

@@ -60,6 +60,7 @@ SECTIONS
         LONG(SIZEOF(.ctors) / 4 - 2)
         /* ctor pointers */
         KEEP(*(SORT(.ctors)))
+        KEEP(*(SORT(.init_array)))
         /* end of list */
         LONG(0)
     } > LRAM

src/target/firmware/board/compal/ram.lds

@@ -62,6 +62,7 @@ SECTIONS
         LONG(SIZEOF(.ctors) / 4 - 2)
         /* ctor pointers */
         KEEP(*(SORT(.ctors)))
+        KEEP(*(SORT(.init_array)))
         /* end of list */
         LONG(0)
     } > LRAM

src/target/firmware/board/compal_e88/flash.lds

@@ -54,6 +54,7 @@ SECTIONS
         LONG(SIZEOF(.ctors) / 4 - 2)
         /* ctor pointers */
         KEEP(*(SORT(.ctors)))
+        KEEP(*(SORT(.init_array)))
         /* end of list */
         LONG(0)
     } > FLASH

src/target/firmware/board/compal_e88/loader.lds

@@ -67,6 +67,7 @@ SECTIONS
         LONG(SIZEOF(.ctors) / 4 - 2)
         /* ctor pointers */
         KEEP(*(SORT(.ctors)))
+        KEEP(*(SORT(.init_array)))
         /* end of list */
         LONG(0)
     } > FLASH

src/target/firmware/board/mediatek/ram.lds

@@ -51,6 +51,7 @@ SECTIONS
         LONG(SIZEOF(.ctors) / 4 - 2)
         /* ctor pointers */
         KEEP(*(SORT(.ctors)))
+        KEEP(*(SORT(.init_array)))
         /* end of list */
         LONG(0)
     } > LRAM