[patch] [5/6] fix libjava build failure with glibc-2.26

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Fix libjava build failure with glibc-2.26, replacing 'struct ucontext' with
ucontext_t.  Ok for the gcc-5 and gcc-6 branches?  Doesn't apply to 7 and trunk,
because libjava is removed.

Matthias

	* include/x86_64-signal.h (HANDLE_DIVIDE_OVERFLOW): Replace
	'struct ucontext' with ucontext_t.
	* include/i386-signal.h (HANDLE_DIVIDE_OVERFLOW): Likewise.
	* include/s390-signal.h (HANDLE_DIVIDE_OVERFLOW): Likewise.


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# DP: Fix libjava build failure with glibc-2.26

--- a/src/libjava/include/x86_64-signal.h
+++ a/src/libjava/include/x86_64-signal.h
@@ -28,7 +28,7 @@
 #define HANDLE_DIVIDE_OVERFLOW						\
 do									\
 {									\
-  struct ucontext *_uc = (struct ucontext *)_p;				\
+  ucontext_t *_uc = (ucontext_t *)_p;					\
   gregset_t &_gregs = _uc->uc_mcontext.gregs;				\
   unsigned char *_rip = (unsigned char *)_gregs[REG_RIP];		\
 									\
--- a/src/libjava/include/i386-signal.h
+++ a/src/libjava/include/i386-signal.h
@@ -29,7 +29,7 @@
 #define HANDLE_DIVIDE_OVERFLOW						\
 do									\
 {									\
-  struct ucontext *_uc = (struct ucontext *)_p;				\
+  ucontext_t *_uc = (ucontext_t *)_p;					\
   gregset_t &_gregs = _uc->uc_mcontext.gregs;				\
   unsigned char *_eip = (unsigned char *)_gregs[REG_EIP];		\
 									\
--- a/src/libjava/include/s390-signal.h
+++ a/src/libjava/include/s390-signal.h
@@ -51,7 +51,7 @@
   struct                                                                \
   {                                                                     \
     unsigned long int uc_flags;                                         \
-    struct ucontext *uc_link;                                           \
+    ucontext_t *uc_link;                                                \
     stack_t uc_stack;                                                   \
     mcontext_t uc_mcontext;                                             \
     unsigned long sigmask[2];                                           \

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