gensh4: Simplify bsp_specs

Updates #3250.

c/src/lib/libbsp/sh/gensh4/bsp_specs

@@ -1,13 +1,9 @@
 %rename endfile old_endfile
 %rename startfile old_startfile
-%rename link old_link
 
 *startfile:
 %{!qrtems: %(old_startfile)} \
-%{!nostdlib: %{qrtems: start.o%s crti.o%s crtbegin.o%s -e _start}}
-
-*link:
-%{!qrtems: %(old_link)} %{qrtems: -dc -dp -N} %{ml|!mb:-EL}%{mb:-EB}
+%{!nostdlib: %{qrtems: crti.o%s crtbegin.o%s}}
 
 *endfile:
 %{!qrtems: %(old_endfile)} %{qrtems: crtend.o%s crtn.o%s}

c/src/lib/libbsp/sh/gensh4/startup/linkcmds

@@ -17,6 +17,8 @@
 
 OUTPUT_ARCH(sh)
 ENTRY(_start)
+STARTUP(start.o)
+
 /* Do we need any of these for elf?
    __DYNAMIC = 0;    */
 

c/src/lib/libbsp/sh/gensh4/startup/linkcmds.rom

@@ -19,6 +19,8 @@ OUTPUT_FORMAT("elf32-shl", "elf32-shl",
 	      "elf32-shl")
 OUTPUT_ARCH(sh)
 ENTRY(_start)
+STARTUP(start.o)
+
 /* Do we need any of these for elf?
    __DYNAMIC = 0;    */
 

c/src/lib/libbsp/sh/gensh4/startup/linkcmds.rom2ram

@@ -19,6 +19,8 @@ OUTPUT_FORMAT("elf32-shl", "elf32-shl",
 	      "elf32-shl")
 OUTPUT_ARCH(sh)
 ENTRY(_start)
+STARTUP(start.o)
+
 /* Do we need any of these for elf?
    __DYNAMIC = 0;    */