gcc: Support only the latest branch releases of gcc

This change, as per #222, reduces the number of supported releases of
gcc to the latest branch releases.

I noticed while doing this work that gcc-4.5.4 was never added, so I
moved patches for gcc-4.5.3 to 4.5.4 and updated the
bfin-unknown-linux-uclibc example. Also, 120-siginfo.patch was fixed
upstream in the 4.5.4 release, so this patch is omitted.

I also bumped the avr sample to 4.9.3 from 4.9.2.

With the addition of gcc-5.x, the gcc release team now releases the
major.minor.0 versions, while updates to the branch are available in
svn/git. We'll address that when we get to issue #219. This change just
removes CC_GCC_5_1 and moves CC_GCC_5_2 to CC_GCC_5, and removes
CC_GCC_5_1_or_later and moves CC_GCC_5_2_or_later to CC_GCC_5_or_later.

This is the first of two part changes, as mentioned in #222.
This change is slated for release in 1.22.0. The next change will be
slated for 1.23.0, and will limit gcc versions to what is on
https://gcc.gnu.org under "Release Series and Status", which is
currently 4.9.3 and 5.2.0, although I will also support the previous
supported version. In this example that would be 4.8.5.

Last, but not least, this change also retires AVR32 support.

Signed-off-by: Bryan Hundven <bryanhundven@gmail.com>

1 files changed, 0 insertions, 120 deletions

diff --git a/patches/gcc/3.4.6/150-arm-ldm.patch b/patches/gcc/3.4.6/150-arm-ldm.patch
deleted file mode 100644
index 18ea493..0000000
--- a/patches/gcc/3.4.6/150-arm-ldm.patch
+++ /dev/null
@@ -1,120 +0,0 @@
-diff -durN gcc-3.4.6.orig/gcc/config/arm/arm.c gcc-3.4.6/gcc/config/arm/arm.c
---- gcc-3.4.6.orig/gcc/config/arm/arm.c	2007-08-15 22:56:20.000000000 +0200
-+++ gcc-3.4.6/gcc/config/arm/arm.c	2007-08-15 22:56:20.000000000 +0200
-@@ -8524,6 +8524,26 @@
-   return_used_this_function = 0;  
- }
- 
-+/* Return the number (counting from 0) of
-+   the least significant set bit in MASK.  */
-+
-+#ifdef __GNUC__
-+inline
-+#endif
-+static int
-+number_of_first_bit_set (mask)
-+     int mask;
-+{
-+  int bit;
-+
-+  for (bit = 0;
-+       (mask & (1 << bit)) == 0;
-+       ++bit)
-+    continue;
-+
-+  return bit;
-+}
-+
- const char *
- arm_output_epilogue (rtx sibling)
- {
-@@ -8757,27 +8777,47 @@
- 	  saved_regs_mask |=   (1 << PC_REGNUM);
- 	}
- 
--      /* Load the registers off the stack.  If we only have one register
--	 to load use the LDR instruction - it is faster.  */
--      if (saved_regs_mask == (1 << LR_REGNUM))
--	{
--	  /* The exception handler ignores the LR, so we do
--	     not really need to load it off the stack.  */
--	  if (eh_ofs)
--	    asm_fprintf (f, "\tadd\t%r, %r, #4\n", SP_REGNUM, SP_REGNUM);
--	  else
--	    asm_fprintf (f, "\tldr\t%r, [%r], #4\n", LR_REGNUM, SP_REGNUM);
--	}
--      else if (saved_regs_mask)
-+      if (saved_regs_mask)
- 	{
--	  if (saved_regs_mask & (1 << SP_REGNUM))
--	    /* Note - write back to the stack register is not enabled
--	       (ie "ldmfd sp!...").  We know that the stack pointer is
--	       in the list of registers and if we add writeback the
--	       instruction becomes UNPREDICTABLE.  */
--	    print_multi_reg (f, "ldmfd\t%r", SP_REGNUM, saved_regs_mask);
-+	  /* Load the registers off the stack.  If we only have one register
-+	     to load use the LDR instruction - it is faster.  */
-+	  if (bit_count (saved_regs_mask) == 1)
-+	    {
-+	      int reg = number_of_first_bit_set (saved_regs_mask);
-+
-+	      switch (reg)
-+		{
-+		case SP_REGNUM:
-+		  /* Mustn't use base writeback when loading SP.  */
-+		  asm_fprintf (f, "\tldr\t%r, [%r]\n", SP_REGNUM, SP_REGNUM);
-+		  break;
-+		  
-+		case LR_REGNUM:
-+		  if (eh_ofs)
-+		    {
-+		      /* The exception handler ignores the LR, so we do
-+			 not really need to load it off the stack.  */
-+		      asm_fprintf (f, "\tadd\t%r, %r, #4\n", SP_REGNUM, SP_REGNUM);
-+		      break;
-+		    }
-+		  /* else fall through */
-+		  
-+		default:
-+		  asm_fprintf (f, "\tldr\t%r, [%r], #4\n", reg, SP_REGNUM);
-+		  break;
-+		}
-+	    }
- 	  else
--	    print_multi_reg (f, "ldmfd\t%r!", SP_REGNUM, saved_regs_mask);
-+	    {
-+	      if (saved_regs_mask & (1 << SP_REGNUM))
-+		/* Note - write back to the stack register is not enabled
-+		   (ie "ldmfd sp!...").  We know that the stack pointer is
-+		   in the list of registers and if we add writeback the
-+		   instruction becomes UNPREDICTABLE.  */
-+		print_multi_reg (f, "ldmfd\t%r", SP_REGNUM, saved_regs_mask);
-+	      else
-+		print_multi_reg (f, "ldmfd\t%r!", SP_REGNUM, saved_regs_mask);
-+	    }
- 	}
- 
-       if (current_function_pretend_args_size)
-@@ -11405,22 +11445,6 @@
-     }
- }
- 
--/* Return the number (counting from 0) of
--   the least significant set bit in MASK.  */
--
--inline static int
--number_of_first_bit_set (int mask)
--{
--  int bit;
--
--  for (bit = 0;
--       (mask & (1 << bit)) == 0;
--       ++bit)
--    continue;
--
--  return bit;
--}
--
- /* Generate code to return from a thumb function.
-    If 'reg_containing_return_addr' is -1, then the return address is
-    actually on the stack, at the stack pointer.  */