[newlib-cygwin] libgloss: bfin: fix various warnings

[Michael Frysinger]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=d4fa7379b0de6088b8c6ec68e3260a96d60a89f7

commit d4fa7379b0de6088b8c6ec68e3260a96d60a89f7
Author: Mike Frysinger <vapier@gentoo.org>
Date:   Sat Feb 12 01:34:21 2022 -0500

    libgloss: bfin: fix various warnings
    
    No functional changes here, just fix warnings the compiler noticed.
    
    bfin/syscalls.c:156:13: warning: conflicting types for built-in function ‘memset’
    
    bfin/syscalls.c: In function ‘_unlink’:
    bfin/syscalls.c:193:3: warning: passing argument 2 of ‘do_syscall’ discards qualifiers from pointer target type
    bfin/syscalls.c:33:1: note: expected ‘void *’ but argument is of type ‘const char *’
    
    bfin/syscalls.c: In function ‘_exit’:
    bfin/syscalls.c:104:1: warning: ‘noreturn’ function does return

Diff:
---
 libgloss/bfin/syscalls.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/libgloss/bfin/syscalls.c b/libgloss/bfin/syscalls.c
index 2dea8c598..7bd0bede1 100644
--- a/libgloss/bfin/syscalls.c
+++ b/libgloss/bfin/syscalls.c
@@ -101,6 +101,7 @@ void
 _exit (int n)
 {
   do_syscall (SYS_exit, &n);
+  __builtin_unreachable ();
 }
 
 int
@@ -153,7 +154,7 @@ _sbrk (int incr)
   return (caddr_t) prev_heap_end;
 }
 
-extern void memset (struct stat *, int, unsigned int);
+extern void *memset (void *, int, unsigned int);
 
 int
 _fstat (int file, struct stat *st)
@@ -190,7 +191,7 @@ _link (const char *existing, const char *new)
 int
 _unlink (const char *path)
 {
-  return do_syscall (SYS_unlink, path);
+  return do_syscall (SYS_unlink, (char *) path);
 }
 
 void