Merge GDB 7.5.1

gdb/gdbserver/acinclude.m4

Index: gdb/gdbserver/acinclude.m4
diff --git a/gdb/gdbserver/acinclude.m4 b/gdb/gdbserver/acinclude.m4
index 87d0db5f02e67057e47b762abb9d131795ce404a..037cc320581588729c6e8c46b93f536c14806721 100644
--- a/gdb/gdbserver/acinclude.m4
+++ b/gdb/gdbserver/acinclude.m4
@@ -1,9 +1,29 @@
 dnl gdb/gdbserver/configure.in uses BFD_HAVE_SYS_PROCFS_TYPE.
 sinclude(../../bfd/bfd.m4)
 
+sinclude(../acx_configure_dir.m4)
+
 dnl This gets autoconf bugfixes
 sinclude(../../config/override.m4)
 
 dnl For ACX_PKGVERSION and ACX_BUGURL.
 sinclude(../../config/acx.m4)
 
+dnl Check for existence of a type $1 in libthread_db.h
+dnl Based on BFD_HAVE_SYS_PROCFS_TYPE in bfd/bfd.m4.
+
+AC_DEFUN([GDBSERVER_HAVE_THREAD_DB_TYPE],
+[AC_MSG_CHECKING([for $1 in thread_db.h])
+ AC_CACHE_VAL(gdbserver_cv_have_thread_db_type_$1,
+   [AC_TRY_COMPILE([
+#include <thread_db.h>],
+      [$1 avar],
+      gdbserver_cv_have_thread_db_type_$1=yes,
+      gdbserver_cv_have_thread_db_type_$1=no
+   )])
+ if test $gdbserver_cv_have_thread_db_type_$1 = yes; then
+   AC_DEFINE([HAVE_]translit($1, [a-z], [A-Z]), 1,
+	     [Define if <thread_db.h> has $1.])
+ fi
+ AC_MSG_RESULT($gdbserver_cv_have_thread_db_type_$1)
+])