[src/trunk]: src/lib/libc/compat/arch/powerpc64/sys Add symbol entries for th...

[christos <christos%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/e8d2cfc70a9f
branches:  trunk
changeset: 1014384:e8d2cfc70a9f
user:      christos <christos%NetBSD.org@localhost>
date:      Sun Sep 20 20:14:50 2020 +0000

description:
Add symbol entries for the missing signal functions for the benefit of
autoconf. Autoconf compiles simple programs like:
    char symbol();
    int main() { return symbol(); }
To check if the symbol is present. This makes it happy.
Another way our symbol renaming breaks things.
This fixes gdb native build, which does not find sigprocmask otherwise
and fails to build because it finds pthread_sigmask() and not sigprocmask()!

diffstat:

 lib/libc/compat/arch/powerpc64/sys/Makefile.inc     |   5 +-
 lib/libc/compat/arch/powerpc64/sys/compat_missing.c |  90 +++++++++++++++++++++
 2 files changed, 93 insertions(+), 2 deletions(-)

diffs (104 lines):

diff -r b0b2faa03fb8 -r e8d2cfc70a9f lib/libc/compat/arch/powerpc64/sys/Makefile.inc
--- a/lib/libc/compat/arch/powerpc64/sys/Makefile.inc   Sun Sep 20 17:59:42 2020 +0000
+++ b/lib/libc/compat/arch/powerpc64/sys/Makefile.inc   Sun Sep 20 20:14:50 2020 +0000
@@ -1,3 +1,4 @@
-#      $NetBSD: Makefile.inc,v 1.3 2011/03/06 17:08:14 bouyer Exp $
+#      $NetBSD: Makefile.inc,v 1.4 2020/09/20 20:14:50 christos Exp $
 
-SRCS+= compat_msgctl.S compat___semctl.S compat_shmctl.S compat_quotactl.S
+SRCS+= compat_msgctl.S compat___semctl.S compat_shmctl.S compat_quotactl.S \
+       compat_missing.c
diff -r b0b2faa03fb8 -r e8d2cfc70a9f lib/libc/compat/arch/powerpc64/sys/compat_missing.c
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/lib/libc/compat/arch/powerpc64/sys/compat_missing.c       Sun Sep 20 20:14:50 2020 +0000
@@ -0,0 +1,90 @@
+/*     $NetBSD: compat_missing.c,v 1.1 2020/09/20 20:14:50 christos Exp $      */
+
+/*-
+ * Copyright (c) 2020 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Christos Zoulas.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__RCSID("$NetBSD: compat_missing.c,v 1.1 2020/09/20 20:14:50 christos Exp $");
+
+/*
+ * define symbols that autoconf is supposed to find
+ * without including the standard headers
+ */
+#define __LIBC12_SOURCE__
+#include <signal.h>
+
+__warn_references(sigaction,
+    "warning: reference to compatibility sigaction(); include <signal.h> to generate correct reference")
+__warn_references(sigpending,
+    "warning: reference to compatibility sigpending(); include <signal.h> to generate correct reference")
+__warn_references(sigprocmask,
+    "warning: reference to compatibility sigprocmask(); include <signal.h> to generate correct reference")
+__warn_references(sigsuspend,
+    "warning: reference to compatibility sigsuspend(); include <signal.h> to generate correct reference")
+
+int sigaction(int, const struct sigaction * restrict,
+    struct sigaction * restrict);
+int __sigaction14(int, const struct sigaction * restrict,
+    struct sigaction * restrict);
+
+int
+sigaction(int sig, const struct sigaction * restrict act,
+    struct sigaction * restrict oact)
+{
+       return __sigaction14(sig, act, oact);
+}
+
+int sigpending(sigset_t *);
+int __sigpending14(sigset_t *);
+
+int
+sigpending(sigset_t *mask)
+{
+       return __sigpending14(mask);
+}
+
+int sigprocmask(int how, const sigset_t * restrict set,
+    sigset_t * restrict oset);
+int __sigprocmask14(int how, const sigset_t * restrict set,
+    sigset_t * restrict oset);
+
+int
+sigprocmask(int how, const sigset_t * restrict set, sigset_t * restrict oset)
+{
+       return __sigprocmask14(how, set, oset);
+}
+
+int sigsuspend(const sigset_t *);
+int __sigsuspend14(const sigset_t *);
+
+int
+sigsuspend(const sigset_t *mask)
+{
+       return __sigsuspend14(mask);
+}