tools/nolibc/signal: move raise() to signal.h

This function is normally found in signal.h, and providing the file
eases porting of existing programs. Let's move it there.
Signed-off-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>

tools/include/nolibc/nolibc.h

@@ -88,6 +88,7 @@
 #include "types.h"
 #include "sys.h"
 #include "ctype.h"
+#include "signal.h"
 #include "stdio.h"
 #include "stdlib.h"
 #include "string.h"

tools/include/nolibc/signal.h

+/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
+/*
+ * signal function definitions for NOLIBC
+ * Copyright (C) 2017-2022 Willy Tarreau <w@1wt.eu>
+ */
+
+#ifndef _NOLIBC_SIGNAL_H
+#define _NOLIBC_SIGNAL_H
+
+#include "std.h"
+#include "arch.h"
+#include "types.h"
+#include "sys.h"
+
+/* This one is not marked static as it's needed by libgcc for divide by zero */
+__attribute__((weak,unused,section(".text.nolibc_raise")))
+int raise(int signal)
+{
+	return sys_kill(sys_getpid(), signal);
+}
+
+#endif /* _NOLIBC_SIGNAL_H */

tools/include/nolibc/stdlib.h

@@ -300,11 +300,4 @@ char *u64toa(uint64_t in)
 	return itoa_buffer;
 }
 
-/* This one is not marked static as it's needed by libgcc for divide by zero */
-__attribute__((weak,unused,section(".text.nolibc_raise")))
-int raise(int signal)
-{
-	return sys_kill(sys_getpid(), signal);
-}
-
 #endif /* _NOLIBC_STDLIB_H */