zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/build/uClibc/libc/signal/signal.c b/ap/build/uClibc/libc/signal/signal.c
new file mode 100644
index 0000000..644617c
--- /dev/null
+++ b/ap/build/uClibc/libc/signal/signal.c
@@ -0,0 +1,54 @@
+/* BSD-like signal function.
+ Copyright (C) 1991,1992,1996,1997,2000,2002,2005
+ Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <errno.h>
+#include <signal.h>
+#include <string.h> /* For the real memset prototype. */
+
+sigset_t _sigintr attribute_hidden; /* Set by siginterrupt. */
+
+/* Set the handler for the signal SIG to HANDLER,
+ returning the old handler, or SIG_ERR on error. */
+__sighandler_t
+signal (int sig, __sighandler_t handler)
+{
+ struct sigaction act, oact;
+
+ /* Check signal extents to protect __sigismember. */
+ if (handler == SIG_ERR || sig < 1 || sig >= NSIG)
+ {
+ __set_errno (EINVAL);
+ return SIG_ERR;
+ }
+
+ act.sa_handler = handler;
+ __sigemptyset (&act.sa_mask);
+ __sigaddset (&act.sa_mask, sig);
+ act.sa_flags = __sigismember (&_sigintr, sig) ? 0 : SA_RESTART;
+ /* In Linux (as of 2.6.25), fails only if sig is SIGKILL or SIGSTOP */
+ if (sigaction (sig, &act, &oact) < 0)
+ return SIG_ERR;
+
+ return oact.sa_handler;
+}
+libc_hidden_def(signal)
+#ifdef __UCLIBC_SUSV3_LEGACY__
+strong_alias(signal,bsd_signal)
+#endif