[newlib-cygwin] Fix v850 libgloss for c99/gcc-14

[Jeff Law <law@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=7382f54405aa81ca4420a58bb805ab21ef1e0b6b

commit 7382f54405aa81ca4420a58bb805ab21ef1e0b6b
Author: Jeff Law <jeffreyalaw@gmail.com>
Date:   Fri Dec 22 20:19:58 2023 -0700

    Fix v850 libgloss for c99/gcc-14
    
    So the prior patch for sysnecv850 was in newlib.  This time we're fixing v850
    bits in libgloss.
    
    Like other patches submitted recently, this converts implicit ints to explicit
    ints, adds a missing prototype and header includes.

Diff:
---
 libgloss/v850/_exit.c  | 2 +-
 libgloss/v850/getpid.c | 3 ++-
 libgloss/v850/isatty.c | 4 ++--
 libgloss/v850/kill.c   | 1 +
 libgloss/v850/read.c   | 1 +
 libgloss/v850/sbrk.c   | 3 +++
 6 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/libgloss/v850/_exit.c b/libgloss/v850/_exit.c
index 44d4132bd..7e1b09262 100644
--- a/libgloss/v850/_exit.c
+++ b/libgloss/v850/_exit.c
@@ -23,7 +23,7 @@ static void _do_dtors()
 }
 
 
-void _exit (n)
+void _exit (int n)
 {
   /* Destructors should be done earlier because they need to be done before the
      files are closed, but here is better than nowhere (and this balances the
diff --git a/libgloss/v850/getpid.c b/libgloss/v850/getpid.c
index 32ac7fbfb..f0fc4d895 100644
--- a/libgloss/v850/getpid.c
+++ b/libgloss/v850/getpid.c
@@ -9,7 +9,8 @@ int __trap0 (int function, int p1, int p2, int p3);
 
 #define TRAP0(f, p1, p2, p3) __trap0(f, (int)(p1), (int)(p2), (int)(p3))
 
-_getpid (n)
+int
+_getpid (int n)
 {
   return 1;
 }
diff --git a/libgloss/v850/isatty.c b/libgloss/v850/isatty.c
index 248ab5248..6e4f205f0 100644
--- a/libgloss/v850/isatty.c
+++ b/libgloss/v850/isatty.c
@@ -9,8 +9,8 @@ int __trap0 (int function, int p1, int p2, int p3);
 
 #define TRAP0(f, p1, p2, p3) __trap0(f, (int)(p1), (int)(p2), (int)(p3))
 
-_isatty (fd)
-     int fd;
+int
+_isatty (int fd)
 {
   return 1;
 }
diff --git a/libgloss/v850/kill.c b/libgloss/v850/kill.c
index 34e5db793..704aa9acc 100644
--- a/libgloss/v850/kill.c
+++ b/libgloss/v850/kill.c
@@ -10,6 +10,7 @@ int __trap0 (int function, int p1, int p2, int p3);
 
 #define TRAP0(f, p1, p2, p3) __trap0(f, (int)(p1), (int)(p2), (int)(p3))
 
+int
 _kill (pid, sig)
      pid_t pid;
      int sig;
diff --git a/libgloss/v850/read.c b/libgloss/v850/read.c
index b55d1cb9e..5ae2c9799 100644
--- a/libgloss/v850/read.c
+++ b/libgloss/v850/read.c
@@ -9,6 +9,7 @@ int __trap0 (int function, int p1, int p2, int p3);
 
 #define TRAP0(f, p1, p2, p3) __trap0(f, (int)(p1), (int)(p2), (int)(p3))
 
+int
 _read (int file,
        char *ptr,
        int len)
diff --git a/libgloss/v850/sbrk.c b/libgloss/v850/sbrk.c
index 248a092b6..65114b0b7 100644
--- a/libgloss/v850/sbrk.c
+++ b/libgloss/v850/sbrk.c
@@ -2,6 +2,9 @@
 #include <sys/types.h>
 #include <sys/stat.h>
 #include "sys/syscall.h"
+#include <stdlib.h>
+
+extern int _write (int, char *, int);
 
 caddr_t
 _sbrk (int incr)