[newlib-cygwin/cygwin-3_5-branch] Cygwin: accommodate gcc -Og option

[Ken Brown]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=784ce7aff8c92b6b729e8bf5564e582360c24d8c

commit 784ce7aff8c92b6b729e8bf5564e582360c24d8c
Author: Corinna Vinschen <corinna@vinschen.de>
Date:   Wed Feb 14 14:00:34 2024 +0100

    Cygwin: accommodate gcc -Og option
    
    All three warnings produced with -Og are false positives.
    But given we're using -Werror unconditionally it's better
    to be safe than sorry.
    
    Reported-by: Kevin Ushey <kevinushey@gmail.com>
    Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
    (cherry picked from commit 2a2a6486a089b90d05b258bd853d136f00cb7c69)

Diff:
---
 winsup/cygwin/fhandler/fifo.cc | 2 +-
 winsup/cygwin/tty.cc           | 2 +-
 winsup/utils/kill.cc           | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/winsup/cygwin/fhandler/fifo.cc b/winsup/cygwin/fhandler/fifo.cc
index efea508ae..ee49ce695 100644
--- a/winsup/cygwin/fhandler/fifo.cc
+++ b/winsup/cygwin/fhandler/fifo.cc
@@ -669,7 +669,7 @@ fhandler_fifo::create_shmem (bool only_open)
 {
   HANDLE sect;
   OBJECT_ATTRIBUTES attr;
-  NTSTATUS status;
+  NTSTATUS status = STATUS_SUCCESS;
   LARGE_INTEGER size = { .QuadPart = sizeof (fifo_shmem_t) };
   SIZE_T viewsize = sizeof (fifo_shmem_t);
   PVOID addr = NULL;
diff --git a/winsup/cygwin/tty.cc b/winsup/cygwin/tty.cc
index bf7c6010f..2cd4ae6ed 100644
--- a/winsup/cygwin/tty.cc
+++ b/winsup/cygwin/tty.cc
@@ -323,7 +323,7 @@ tty::wait_fwd ()
      thread when the last data is transfered. */
   const ULONGLONG sleep_in_nat_pipe = 16;
   const ULONGLONG time_to_wait = sleep_in_nat_pipe * 2 + 1/* margine */;
-  ULONGLONG elapsed;
+  ULONGLONG elapsed = 0;
   while (fwd_not_empty
 	 || (elapsed = GetTickCount64 () - fwd_last_time) < time_to_wait)
     {
diff --git a/winsup/utils/kill.cc b/winsup/utils/kill.cc
index fb45e4c9d..bcabcd47c 100644
--- a/winsup/utils/kill.cc
+++ b/winsup/utils/kill.cc
@@ -73,7 +73,7 @@ print_version ()
 static const char *
 strsigno (int signo)
 {
-  static char sigbuf[8];
+  static char sigbuf[32];
 
   if (signo > 0 && signo < SIGRTMIN)
     return sys_sigabbrev[signo];