gcc6: Upgrade to 6.4

Cherry-picked from oe-core master 7874fa86cb583fe6a178b95ead09430486197197

(From OE-Core rev: 86ffec0971b521bdaf9b031005bd3561ff97bdf8)

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 102 insertions, 0 deletions

diff --git a/meta/recipes-devtools/gcc/gcc-6.4/0038-Search-target-sysroot-gcc-version-specific-dirs-with.patch b/meta/recipes-devtools/gcc/gcc-6.4/0038-Search-target-sysroot-gcc-version-specific-dirs-with.patch
new file mode 100644
index 0000000000..89ee79db89
--- /dev/null
+++ b/meta/recipes-devtools/gcc/gcc-6.4/0038-Search-target-sysroot-gcc-version-specific-dirs-with.patch
@@ -0,0 +1,102 @@
+From 42e4cdcaad590536246866b0846ec279e124fa16 Mon Sep 17 00:00:00 2001
+From: Khem Raj <raj.khem@gmail.com>
+Date: Mon, 7 Dec 2015 23:41:45 +0000
+Subject: [PATCH 38/46] Search target sysroot gcc version specific dirs with
+ multilib.
+
+We install the gcc libraries (such as crtbegin.p) into
+<sysroot><libdir>/<target-sys>/5.2.0/
+which is a default search path for GCC (aka multi_suffix in the
+code below). <target-sys> is 'machine' in gcc's terminology. We use
+these directories so that multiple gcc versions could in theory
+co-exist on target.
+
+We only want to build one gcc-cross-canadian per arch and have this work
+for all multilibs. <target-sys> can be handled by mapping the multilib
+<target-sys> to the one used by gcc-cross-canadian, e.g.
+mips64-polkmllib32-linux
+is symlinked to by mips64-poky-linux.
+
+The default gcc search path in the target sysroot for a "lib64" mutlilib
+is:
+
+<sysroot>/lib32/mips64-poky-linux/5.2.0/
+<sysroot>/lib32/../lib64/
+<sysroot>/usr/lib32/mips64-poky-linux/5.2.0/
+<sysroot>/usr/lib32/../lib64/
+<sysroot>/lib32/
+<sysroot>/usr/lib32/
+
+which means that the lib32 crtbegin.o will be found and the lib64 ones
+will not which leads to compiler failures.
+
+This patch injects a multilib version of that path first so the lib64
+binaries can be found first. With this change the search path becomes:
+
+<sysroot>/lib32/../lib64/mips64-poky-linux/5.2.0/
+<sysroot>/lib32/mips64-poky-linux/5.2.0/
+<sysroot>/lib32/../lib64/
+<sysroot>/usr/lib32/../lib64/mips64-poky-linux/5.2.0/
+<sysroot>/usr/lib32/mips64-poky-linux/5.2.0/
+<sysroot>/usr/lib32/../lib64/
+<sysroot>/lib32/
+<sysroot>/usr/lib32/
+
+Upstream-Status: Pending
+RP 2015/7/31
+
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+---
+ gcc/gcc.c | 29 ++++++++++++++++++++++++++++-
+ 1 file changed, 28 insertions(+), 1 deletion(-)
+
+diff --git a/gcc/gcc.c b/gcc/gcc.c
+index 94c240e..2812819 100644
+--- a/gcc/gcc.c
++++ b/gcc/gcc.c
+@@ -2507,7 +2507,7 @@ for_each_path (const struct path_prefix *paths,
+       if (path == NULL)
+        {
+          len = paths->max_len + extra_space + 1;
+-         len += MAX (MAX (suffix_len, multi_os_dir_len), multiarch_len);
++         len += MAX ((suffix_len + multi_os_dir_len), multiarch_len);
+          path = XNEWVEC (char, len);
+        }
+ 
+@@ -2519,6 +2519,33 @@ for_each_path (const struct path_prefix *paths,
+          /* Look first in MACHINE/VERSION subdirectory.  */
+          if (!skip_multi_dir)
+            {
++             if (!(pl->os_multilib ? skip_multi_os_dir : skip_multi_dir))
++               {
++                 const char *this_multi;
++                 size_t this_multi_len;
++
++                 if (pl->os_multilib)
++                   {
++                     this_multi = multi_os_dir;
++                     this_multi_len = multi_os_dir_len;
++                   }
++                 else
++                   {
++                     this_multi = multi_dir;
++                     this_multi_len = multi_dir_len;
++                   }
++
++                 /* Look in multilib MACHINE/VERSION subdirectory first */
++                 if (this_multi_len)
++                   {
++                     memcpy (path + len, this_multi, this_multi_len + 1);
++                     memcpy (path + len + this_multi_len, multi_suffix, suffix_len + 1);
++                     ret = callback (path, callback_info);
++                       if (ret)
++                         break;
++                   }
++               }
++
+              memcpy (path + len, multi_suffix, suffix_len + 1);
+              ret = callback (path, callback_info);
+              if (ret)
+-- 
+2.8.2
+