crosstool-ng: patches/binutils/2.21.1a/300-012_check_ldrunpath

cc/gcc: add the backend/frontend infra for final gcc

Currently, we issue the bare-metal compiler from the pass_1 & pass_2
core compilers, because the final gcc breaks while doing so.

This implies we have to build some libces during the start_files step,
instead of the standard libc step. This is the case for newlib.

By adding a backend/frontend infra to the final gcc, we can abstract
what backend to call: the standard backend for non-bare-metal gcc,
and the core backend for bare-metal.

This patch is just an no-op, it just adds the final backend and
frontend without changing the way bare-metal is built, to come in a
subsequent patch.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>

     1 diff -durN binutils-2.21.1.orig/ld/emultempl/elf32.em binutils-2.21.1/ld/emultempl/elf32.em

     2 --- binutils-2.21.1.orig/ld/emultempl/elf32.em	2011-06-27 09:39:14.000000000 +0200

     3 +++ binutils-2.21.1/ld/emultempl/elf32.em	2011-09-12 13:39:08.808908274 +0200

     4 @@ -1272,6 +1272,8 @@

     5  	      && command_line.rpath == NULL)

     6  	    {

     7  	      lib_path = (const char *) getenv ("LD_RUN_PATH");

     8 +	      if ((lib_path) && (strlen (lib_path) == 0))

     9 +	      	lib_path = NULL;

    10  	      if (gld${EMULATION_NAME}_search_needed (lib_path, &n,

    11  						      force))

    12  		break;

    13 @@ -1499,6 +1501,8 @@

    14    rpath = command_line.rpath;

    15    if (rpath == NULL)

    16      rpath = (const char *) getenv ("LD_RUN_PATH");

    17 +  if ((rpath) && (strlen (rpath) == 0))

    18 +  	rpath = NULL;

    20    for (abfd = link_info.input_bfds; abfd; abfd = abfd->link_next)

    21      if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)

author	"Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
	Sun Jul 17 22:46:47 2011 +0200 (2011-07-17)
changeset 2892	aa934ec4b4ee
permissions	-rw-r--r--