[Feature][ZXW-33]merge ZXW 0428 version
Change-Id: I11f167edfea428d9fab198ff00ff1364932d1b0b
diff --git a/ap/libc/glibc/glibc-2.23/nptl/pt-fork.c b/ap/libc/glibc/glibc-2.23/nptl/pt-fork.c
new file mode 100644
index 0000000..b65d6b4
--- /dev/null
+++ b/ap/libc/glibc/glibc-2.23/nptl/pt-fork.c
@@ -0,0 +1,72 @@
+/* ABI compatibility for 'fork' symbol in libpthread ABI.
+ Copyright (C) 2002-2016 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <unistd.h>
+#include <shlib-compat.h>
+
+/* libpthread once had its own fork, though there was no apparent reason
+ for it. There is no use in having a separate symbol in libpthread, but
+ the historical ABI requires it. For static linking, there is no need to
+ provide anything here--the libc version will be linked in. For shared
+ library ABI compatibility, there must be __fork and fork symbols in
+ libpthread.so; so we define them using IFUNC to redirect to the libc
+ function. */
+
+#if SHLIB_COMPAT (libpthread, GLIBC_2_0, GLIBC_2_22)
+
+# if HAVE_IFUNC
+
+static __typeof (fork) *
+__attribute__ ((used))
+fork_resolve (void)
+{
+ return &__libc_fork;
+}
+
+# ifdef HAVE_ASM_SET_DIRECTIVE
+# define DEFINE_FORK(name) \
+ asm (".set " #name ", fork_resolve\n" \
+ ".globl " #name "\n" \
+ ".type " #name ", %gnu_indirect_function");
+# else
+# define DEFINE_FORK(name) \
+ asm (#name " = fork_resolve\n" \
+ ".globl " #name "\n" \
+ ".type " #name ", %gnu_indirect_function");
+# endif
+
+# else /* !HAVE_IFUNC */
+
+static pid_t __attribute__ ((used))
+fork_compat (void)
+{
+ return __libc_fork ();
+}
+
+# define DEFINE_FORK(name) strong_alias (fork_compat, name)
+
+# endif /* HAVE_IFUNC */
+
+DEFINE_FORK (fork_ifunc)
+compat_symbol (libpthread, fork_ifunc, fork, GLIBC_2_0);
+
+DEFINE_FORK (__fork_ifunc)
+compat_symbol (libpthread, __fork_ifunc, __fork, GLIBC_2_0);
+
+#endif