arch/lm32/ram.ld: remove all cruft

Remove all unneeded stuff from the linker script. Now the script only
includes what is actually used: it is easier to understand and change
(we'll add some local ELF sections), and it makes a better reference
for possible porting to a different architecture.

This commit also moves the default libraries from the linker script
itself to the LDFLAGS in Makefile, where they really belong.

CONFIG_DETERMINISTIC_BINARY confirms this makes no difference in
the generated binary (nor the ELF FWIW).

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Makefile

@@ -129,3 +129,4 @@ scripts_basic config %config:
 	$(MAKE) -f Makefile.kconfig $@
 
 .config: silentoldconfig
+

arch/lm32/ram.ld

@@ -36,114 +36,24 @@ MEMORY
 
 SECTIONS
 {
+	.boot : { *(.boot) } > ram
 
-  .boot : { *(.boot) } > ram
+	.text : { *(.text .text.*) } > ram =0
 
-  /* Code */
-  .text           :
-  {
-    . = ALIGN(4);
-    _ftext = .;
-    _ftext_rom = LOADADDR(.text);
-    *(.text .stub .text.* .gnu.linkonce.t.*)
-    *(.gnu.warning)
-    KEEP (*(.init))
-    KEEP (*(.fini))
-    /* Constructors and destructors */
-    KEEP (*crtbegin*.o(.ctors))
-    KEEP (*(EXCLUDE_FILE (*crtend*.o ) .ctors))
-    KEEP (*(SORT(.ctors.*)))
-    KEEP (*(.ctors))
-    KEEP (*crtbegin*.o(.dtors))
-    KEEP (*(EXCLUDE_FILE (*crtend*.o ) .dtors))
-    KEEP (*(SORT(.dtors.*)))
-    KEEP (*(.dtors))
-    KEEP (*(.jcr))
-    _etext = .;
-  } > ram =0
+	.rodata : { *(.rodata .rodata.*) } > ram
 
-  /* Exception handlers */
-  .eh_frame_hdr : { *(.eh_frame_hdr) } > ram
-  .eh_frame : { KEEP (*(.eh_frame)) } > ram
-  .gcc_except_table : { *(.gcc_except_table) *(.gcc_except_table.*) } > ram
+	.data : {
+		*(.data .data.*)
+		_gp = ALIGN(16) + 0x7ff0; /* FIXME: what is this? */
+	} > ram
 
-  /* Read-only data */
-  .rodata         :
-  {
-    . = ALIGN(4);
-    _frodata = .;
-    _frodata_rom = LOADADDR(.rodata);
-    *(.rodata .rodata.* .gnu.linkonce.r.*)
-    *(.rodata1)
-    _erodata = .;
-  } > ram
+	.bss : {
+		_fbss = .;
+		*(.bss .bss.*)
+		*(COMMON)
+		_ebss = .;
+	} > ram
 
-  /* Data */
-  .data           :
-  {
-    . = ALIGN(4);
-    _fdata = .;
-    _fdata_rom = LOADADDR(.data);
-    *(.data .data.* .gnu.linkonce.d.*)
-    *(.data1)
-    SORT(CONSTRUCTORS)
-    _gp = ALIGN(16) + 0x7ff0;
-    *(.sdata .sdata.* .gnu.linkonce.s.*)
-    _edata = .;
-  } > ram
-
-  /* BSS */
-  .bss           :
-  {
-    . = ALIGN(4);
-    _fbss = .;
-    *(.dynsbss)
-    *(.sbss .sbss.* .gnu.linkonce.sb.*)
-    *(.scommon)
-    *(.dynbss)
-    *(.bss .bss.* .gnu.linkonce.b.*)
-    *(COMMON)
-    . = ALIGN(4);
-    _ebss = .;
-    _end = .;
-    PROVIDE (end = .);
-  } > ram
-
-  /* First location in stack is highest address in RAM */
-  PROVIDE(_fstack = ORIGIN(ram) + LENGTH(ram) - 4);
-
-  /* Stabs debugging sections.  */
-  .stab          0 : { *(.stab) }
-  .stabstr       0 : { *(.stabstr) }
-  .stab.excl     0 : { *(.stab.excl) }
-  .stab.exclstr  0 : { *(.stab.exclstr) }
-  .stab.index    0 : { *(.stab.index) }
-  .stab.indexstr 0 : { *(.stab.indexstr) }
-  .comment       0 : { *(.comment) }
-
-  /* DWARF debug sections.
-     Symbols in the DWARF debugging sections are relative to the beginning
-     of the section so we begin them at 0.  */
-  /* DWARF 1 */
-  .debug          0 : { *(.debug) }
-  .line           0 : { *(.line) }
-  /* GNU DWARF 1 extensions */
-  .debug_srcinfo  0 : { *(.debug_srcinfo) }
-  .debug_sfnames  0 : { *(.debug_sfnames) }
-  /* DWARF 1.1 and DWARF 2 */
-  .debug_aranges  0 : { *(.debug_aranges) }
-  .debug_pubnames 0 : { *(.debug_pubnames) }
-  /* DWARF 2 */
-  .debug_info     0 : { *(.debug_info .gnu.linkonce.wi.*) }
-  .debug_abbrev   0 : { *(.debug_abbrev) }
-  .debug_line     0 : { *(.debug_line) }
-  .debug_frame    0 : { *(.debug_frame) }
-  .debug_str      0 : { *(.debug_str) }
-  .debug_loc      0 : { *(.debug_loc) }
-  .debug_macinfo  0 : { *(.debug_macinfo) }
-  /* SGI/MIPS DWARF 2 extensions */
-  .debug_weaknames 0 : { *(.debug_weaknames) }
-  .debug_funcnames 0 : { *(.debug_funcnames) }
-  .debug_typenames 0 : { *(.debug_typenames) }
-  .debug_varnames  0 : { *(.debug_varnames) }
+	/* First location in stack is highest address in RAM */
+	PROVIDE(_fstack = ORIGIN(ram) + LENGTH(ram) - 4);
 }