gcc-linaro-6.3: Add patch for enable builds with glibc 2.26

The glibc 2.26 changed the struct ucontext to ucontext_t, this
is a backported patch from oe-core.

Tested building rpb-minimal-image for db410c.

Change-Id: I2da06935aa2ba05c22260825eaf63ea4da17bb72
Signed-off-by: Aníbal Limón <anibal.limon@linaro.org>

2 files changed, 140 insertions, 0 deletions

diff --git a/meta-linaro-toolchain/recipes-devtools/gcc/gcc-linaro-6.3.inc b/meta-linaro-toolchain/recipes-devtools/gcc/gcc-linaro-6.3.inc
index 0852fb9a..f43d0d4c 100644
--- a/meta-linaro-toolchain/recipes-devtools/gcc/gcc-linaro-6.3.inc
+++ b/meta-linaro-toolchain/recipes-devtools/gcc/gcc-linaro-6.3.inc
@@ -80,6 +80,7 @@ SRC_URI = "\
            file://0045-libgcc-Add-knob-to-use-ldbl-128-on-ppc.patch \
            file://0046-Link-libgcc-using-LDFLAGS-not-just-SHLIB_LDFLAGS.patch \
            file://0047-libgcc_s-Use-alias-for-__cpu_indicator_init-instead-.patch \
+           file://0055-unwind_h-glibc26.patch \
            ${BACKPORTS} \
 "
 BACKPORTS = ""
diff --git a/meta-linaro-toolchain/recipes-devtools/gcc/gcc-linaro-6.3/0055-unwind_h-glibc26.patch b/meta-linaro-toolchain/recipes-devtools/gcc/gcc-linaro-6.3/0055-unwind_h-glibc26.patch
new file mode 100644
index 00000000..c266cfe2
--- /dev/null
+++ b/meta-linaro-toolchain/recipes-devtools/gcc/gcc-linaro-6.3/0055-unwind_h-glibc26.patch
@@ -0,0 +1,139 @@
+Backport and edit of patches from:
+https://gcc.gnu.org/viewcvs/gcc?limit_changes=0&view=revision&revision=249957
+by jsm28 (Joseph Myers)
+
+Current glibc no longer gives the ucontext_t type the tag struct
+ucontext, to conform with POSIX namespace rules.  This requires
+various linux-unwind.h files in libgcc, that were previously using
+struct ucontext, to be fixed to use ucontext_t instead.  This is
+similar to the removal of the struct siginfo tag from siginfo_t some
+years ago.
+
+This patch changes those files to use ucontext_t instead.  As the
+standard name that should be unconditionally safe, so this is not
+restricted to architectures supported by glibc, or conditioned on the
+glibc version.
+
+Upstream-Status: Backport
+
+Signed-off-by: Juro Bystricky <juro.bystricky@intel.com>
+
+--- branches/gcc-6-branch/libgcc/config/aarch64/linux-unwind.h	2017/07/04 10:22:56	249956
+--- b/libgcc/config/aarch64/linux-unwind.h	2017/07/04 10:23:57	249957
+@@ -52,7 +52,7 @@
+   struct rt_sigframe
+   {
+     siginfo_t info;
+-    struct ucontext uc;
++    ucontext_t uc;
+   };
+ 
+   struct rt_sigframe *rt_;
+--- branches/gcc-6-branch/libgcc/config/alpha/linux-unwind.h	2017/07/04 10:22:56	249956
+--- b/libgcc/config/alpha/linux-unwind.h	2017/07/04 10:23:57	249957
+@@ -51,7 +51,7 @@
+     {
+       struct rt_sigframe {
+ 	siginfo_t info;
+-	struct ucontext uc;
++	ucontext_t uc;
+       } *rt_ = context->cfa;
+       sc = &rt_->uc.uc_mcontext;
+     }
+--- branches/gcc-6-branch/libgcc/config/bfin/linux-unwind.h	2017/07/04 10:22:56	249956
+--- b/libgcc/config/bfin/linux-unwind.h	2017/07/04 10:23:57	249957
+@@ -52,7 +52,7 @@
+ 	void *puc;
+ 	char retcode[8];
+ 	siginfo_t info;
+-	struct ucontext uc;
++	ucontext_t uc;
+       } *rt_ = context->cfa;
+ 
+       /* The void * cast is necessary to avoid an aliasing warning.
+--- branches/gcc-6-branch/libgcc/config/i386/linux-unwind.h	2017/07/04 10:22:56	249956
+--- b/libgcc/config/i386/linux-unwind.h	2017/07/04 10:23:57	249957
+@@ -58,7 +58,7 @@
+   if (*(unsigned char *)(pc+0) == 0x48
+       && *(unsigned long long *)(pc+1) == RT_SIGRETURN_SYSCALL)
+     {
+-      struct ucontext *uc_ = context->cfa;
++      ucontext_t *uc_ = context->cfa;
+       /* The void * cast is necessary to avoid an aliasing warning.
+          The aliasing warning is correct, but should not be a problem
+          because it does not alias anything.  */
+@@ -138,7 +138,7 @@
+ 	siginfo_t *pinfo;
+ 	void *puc;
+ 	siginfo_t info;
+-	struct ucontext uc;
++	ucontext_t uc;
+       } *rt_ = context->cfa;
+       /* The void * cast is necessary to avoid an aliasing warning.
+          The aliasing warning is correct, but should not be a problem
+--- branches/gcc-6-branch/libgcc/config/m68k/linux-unwind.h	2017/07/04 10:22:56	249956
+--- b/libgcc/config/m68k/linux-unwind.h	2017/07/04 10:23:57	249957
+@@ -33,7 +33,7 @@
+ /* <sys/ucontext.h> is unfortunately broken right now.  */
+ struct uw_ucontext {
+ 	unsigned long	  uc_flags;
+-	struct ucontext  *uc_link;
++	ucontext_t	 *uc_link;
+ 	stack_t		  uc_stack;
+ 	mcontext_t	  uc_mcontext;
+ 	unsigned long	  uc_filler[80];
+--- branches/gcc-6-branch/libgcc/config/nios2/linux-unwind.h	2017/07/04 10:22:56	249956
+--- b/libgcc/config/nios2/linux-unwind.h	2017/07/04 10:23:57	249957
+@@ -38,7 +38,7 @@
+ 
+ struct nios2_ucontext {
+   unsigned long uc_flags;
+-  struct ucontext *uc_link;
++  ucontext_t *uc_link;
+   stack_t uc_stack;
+   struct nios2_mcontext uc_mcontext;
+   sigset_t uc_sigmask;	/* mask last for extensibility */
+--- branches/gcc-6-branch/libgcc/config/pa/linux-unwind.h	2017/07/04 10:22:56	249956
+--- b/libgcc/config/pa/linux-unwind.h	2017/07/04 10:23:57	249957
+@@ -80,7 +80,7 @@
+   struct sigcontext *sc;
+   struct rt_sigframe {
+     siginfo_t info;
+-    struct ucontext uc;
++    ucontext_t uc;
+   } *frame;
+ 
+   /* rt_sigreturn trampoline:
+--- branches/gcc-6-branch/libgcc/config/sh/linux-unwind.h	2017/07/04 10:22:56	249956
+--- b/libgcc/config/sh/linux-unwind.h	2017/07/04 10:23:57	249957
+@@ -180,7 +180,7 @@
+     {
+       struct rt_sigframe {
+ 	siginfo_t info;
+-	struct ucontext uc;
++	ucontext_t uc;
+       } *rt_ = context->cfa;
+       /* The void * cast is necessary to avoid an aliasing warning.
+          The aliasing warning is correct, but should not be a problem
+--- branches/gcc-6-branch/libgcc/config/tilepro/linux-unwind.h	2017/07/04 10:22:56	249956
+--- b/libgcc/config/tilepro/linux-unwind.h	2017/07/04 10:23:57	249957
+@@ -61,7 +61,7 @@
+   struct rt_sigframe {
+     unsigned char save_area[C_ABI_SAVE_AREA_SIZE];
+     siginfo_t info;
+-    struct ucontext uc;
++    ucontext_t uc;
+   } *rt_;
+ 
+   /* Return if this is not a signal handler.  */
+--- branches/gcc-6-branch/libgcc/config/xtensa/linux-unwind.h	2017/07/04 10:22:56	249956
+--- b/libgcc/config/xtensa/linux-unwind.h	2017/07/04 10:23:57	249957
+@@ -67,7 +67,7 @@
+ 
+   struct rt_sigframe {
+     siginfo_t info;
+-    struct ucontext uc;
++    ucontext_t uc;
+   } *rt_;
+ 
+   /* movi a2, __NR_rt_sigreturn; syscall */