gcc family : upgrade to 4.5.0

Imported OE patches into the poky recipes.
	- Use elfutils instead of libelf

Converted OE's svn source into tar ball & a patch.

Added a patch to revert the baseversion to 4.5.0

Merge OE & poky extra_oeconf_options

Fix the zlib (inside gcc)  make issue by providing the --with-system-zlib switch in EXTRA_OECONF

Found out that some header file dirs were soft linked to non-existing
locations like c_std. Changed the configure options to point them to
existing locations like c_global.

gcc-cross-canadian_4.5.0: fix configure issue

Thanks to Saul Wold for providing poky gcc patches rebased to the 4.5.0
sources.

Signed-off-by: Nitin A Kamble <nitin.a.kamble@intel.com>

1 files changed, 74 insertions, 0 deletions

diff --git a/meta/packages/gcc/gcc-4.5.0/904-flatten-switch-stmt-00.patch b/meta/packages/gcc/gcc-4.5.0/904-flatten-switch-stmt-00.patch
new file mode 100644
index 0000000000..c4641dc63e
--- /dev/null
+++ b/meta/packages/gcc/gcc-4.5.0/904-flatten-switch-stmt-00.patch
@@ -0,0 +1,74 @@
+Hi,
+
+The attached patch makes sure that we create smaller object code for
+simple switch statements. We just make sure to flatten the switch
+statement into an if-else chain, basically.
+
+This fixes a size-regression as compared to gcc-3.4, as can be seen
+below.
+
+2007-04-15  Bernhard Fischer  <..>
+
+	* stmt.c (expand_case): Do not create a complex binary tree when
+	optimizing for size but rather use the simple ordered list.
+	(emit_case_nodes): do not emit jumps to the default_label when
+	optimizing for size.
+
+Not regtested so far.
+Comments?
+
+Attached is the test switch.c mentioned below.
+
+$ for i in 2.95 3.3 3.4 4.0 4.1 4.2.orig-HEAD 4.3.orig-HEAD 4.3-HEAD;do
+gcc-$i  -DCHAIN -Os -o switch-CHAIN-$i.o -c switch.c ;done
+$ for i in 2.95 3.3 3.4 4.0 4.1 4.2.orig-HEAD 4.3.orig-HEAD 4.3-HEAD;do
+gcc-$i  -UCHAIN -Os -o switch-$i.o -c switch.c ;done
+
+$ size switch-*.o
+   text	   data	    bss	    dec	    hex	filename
+    169	      0	      0	    169	     a9	switch-2.95.o
+    115	      0	      0	    115	     73	switch-3.3.o
+    103	      0	      0	    103	     67	switch-3.4.o
+    124	      0	      0	    124	     7c	switch-4.0.o
+    124	      0	      0	    124	     7c	switch-4.1.o
+    124	      0	      0	    124	     7c	switch-4.2.orig-HEAD.o
+     95	      0	      0	     95	     5f	switch-4.3-HEAD.o
+    124	      0	      0	    124	     7c	switch-4.3.orig-HEAD.o
+    166	      0	      0	    166	     a6	switch-CHAIN-2.95.o
+    111	      0	      0	    111	     6f	switch-CHAIN-3.3.o
+     95	      0	      0	     95	     5f	switch-CHAIN-3.4.o
+     95	      0	      0	     95	     5f	switch-CHAIN-4.0.o
+     95	      0	      0	     95	     5f	switch-CHAIN-4.1.o
+     95	      0	      0	     95	     5f	switch-CHAIN-4.2.orig-HEAD.o
+     95	      0	      0	     95	     5f	switch-CHAIN-4.3-HEAD.o
+     95	      0	      0	     95	     5f	switch-CHAIN-4.3.orig-HEAD.o
+
+
+Content-Type: text/x-diff; charset=us-ascii
+Content-Disposition: attachment; filename="gcc-4.3.gcc-flatten-switch-stmt.00.diff"
+
+Index: gcc-4.5.0/gcc/stmt.c
+===================================================================
+--- gcc-4.5.0.orig/gcc/stmt.c	2010-02-19 01:53:51.000000000 -0800
++++ gcc-4.5.0/gcc/stmt.c	2010-06-25 11:05:31.816881094 -0700
+@@ -2440,7 +2440,11 @@
+ 	     default code is emitted.  */
+ 
+ 	  use_cost_table = estimate_case_costs (case_list);
+-	  balance_case_nodes (&case_list, NULL);
++	  /* When optimizing for size, we want a straight list to avoid
++	     jumps as much as possible. This basically creates an if-else
++	     chain.  */
++	  if (!optimize_size)
++	    balance_case_nodes (&case_list, NULL);
+ 	  emit_case_nodes (index, case_list, default_label, index_type);
+ 	  if (default_label)
+ 	    emit_jump (default_label);
+@@ -3008,6 +3012,7 @@
+ 	    {
+ 	      if (!node_has_low_bound (node, index_type))
+ 		{
++		  if (!optimize_size) /* don't jl to the .default_label. */
+ 		  emit_cmp_and_jump_insns (index,
+ 					   convert_modes
+ 					   (mode, imode,