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

[Jeff Law <law@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=1df8f9f09b0999e04bc0bbd7170ac7dbfa278213

commit 1df8f9f09b0999e04bc0bbd7170ac7dbfa278213
Author: Jeff Law <jeffreyalaw@gmail.com>
Date:   Fri Dec 22 21:29:56 2023 -0700

    Fix epiphany libgloss for c99/gcc-14
    
    So in this case we mostly need to include an internal header
    (epiphany-syscalls.h).  In a few cases an explicit prototype is added.  We've
    also got a return with no value in a function with a non-void return type.
    Finally the asm_syscall interface expects a pointer as its first argument.  In
    a few cases we've actually got an int (file descriptor) which we just cast to a
    void *.
    
    It's slightly more than Jeff J's pre-approval, but I think still reasonable.

Diff:
---
 libgloss/epiphany/_isatty.c           | 1 +
 libgloss/epiphany/epiphany-syscalls.c | 2 +-
 libgloss/epiphany/epiphany-syscalls.h | 2 ++
 libgloss/epiphany/fstat.c             | 3 ++-
 libgloss/epiphany/gettimeofday.c      | 1 +
 libgloss/epiphany/link.c              | 1 +
 libgloss/epiphany/lseek.c             | 3 ++-
 libgloss/epiphany/stat.c              | 1 +
 libgloss/epiphany/unlink.c            | 1 +
 9 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/libgloss/epiphany/_isatty.c b/libgloss/epiphany/_isatty.c
index cfb1bf6e4..f05aba3c3 100644
--- a/libgloss/epiphany/_isatty.c
+++ b/libgloss/epiphany/_isatty.c
@@ -18,6 +18,7 @@
 
 #include <sys/stat.h>
 #include <errno.h>
+#include "epiphany-syscalls.h"
 
 int
 _isatty (int fd)
diff --git a/libgloss/epiphany/epiphany-syscalls.c b/libgloss/epiphany/epiphany-syscalls.c
index e6ebcee24..4c03fe291 100644
--- a/libgloss/epiphany/epiphany-syscalls.c
+++ b/libgloss/epiphany/epiphany-syscalls.c
@@ -253,7 +253,7 @@ int __attribute__ ((section ("libgloss_epiphany")))  e_raise(int signum) {
 		__asm__ __volatile__ ("wand");
 		//ilatst = 1 << WAND_IVT_N;
 		//break;
-		return;
+		return 0;
 
 	case SIG_USR1:
 		ilatst = 1 << USR_SOFT_IVT_N;
diff --git a/libgloss/epiphany/epiphany-syscalls.h b/libgloss/epiphany/epiphany-syscalls.h
index 3af1c6f7b..b46587573 100644
--- a/libgloss/epiphany/epiphany-syscalls.h
+++ b/libgloss/epiphany/epiphany-syscalls.h
@@ -35,5 +35,7 @@ int asm_open(const char* FILE, int FLAGS, int MODE);
 void asm_exit(int STATUS);
 int asm_close(int CHAN);
 int asm_syscall(void *P1, void *P2, void *P3, int SUBFUN);
+int _fstat (int, struct stat *st);
+
 
 #endif
diff --git a/libgloss/epiphany/fstat.c b/libgloss/epiphany/fstat.c
index 5a20b57f3..d126c2de8 100644
--- a/libgloss/epiphany/fstat.c
+++ b/libgloss/epiphany/fstat.c
@@ -31,6 +31,7 @@
 
 #include <sys/stat.h>
 #include <syscall.h>
+#include "epiphany-syscalls.h"
 
 
 /* ------------------------------------------------------------------------- */
@@ -44,6 +45,6 @@
 int __attribute__ ((section ("libgloss_epiphany")))
 _fstat (int fildes, struct stat *st)
 {
-  return asm_syscall (fildes, st, NULL, SYS_fstat);
+  return asm_syscall ((void *)fildes, st, NULL, SYS_fstat);
 
 }	/* _fstat () */
diff --git a/libgloss/epiphany/gettimeofday.c b/libgloss/epiphany/gettimeofday.c
index e169385ea..36f17b8b0 100644
--- a/libgloss/epiphany/gettimeofday.c
+++ b/libgloss/epiphany/gettimeofday.c
@@ -31,6 +31,7 @@
 #include <errno.h>
 #include <sys/time.h>
 #include "syscall.h"
+#include "epiphany-syscalls.h"
 
 int
 _gettimeofday (struct timeval *tp, void *tzp)
diff --git a/libgloss/epiphany/link.c b/libgloss/epiphany/link.c
index d87637e39..fd0d8b9cb 100644
--- a/libgloss/epiphany/link.c
+++ b/libgloss/epiphany/link.c
@@ -31,6 +31,7 @@
 
 #include <unistd.h>
 #include <syscall.h>
+#include "epiphany-syscalls.h"
 
 
 /* ------------------------------------------------------------------------- */
diff --git a/libgloss/epiphany/lseek.c b/libgloss/epiphany/lseek.c
index 64ffcdd28..65d7e52da 100644
--- a/libgloss/epiphany/lseek.c
+++ b/libgloss/epiphany/lseek.c
@@ -30,6 +30,7 @@
 
 #include <syscall.h>
 #include <sys/types.h>
+#include "epiphany-syscalls.h"
 
 /* ------------------------------------------------------------------------- */
 /*!Set a position in a file
@@ -43,5 +44,5 @@
 off_t __attribute__ ((section ("libgloss_epiphany")))
 _lseek (int  fildes, off_t offset, int  whence)
 {
-  return asm_syscall (fildes, offset, whence, SYS_lseek);
+  return asm_syscall ((void *)fildes, (void *)offset, (void *)whence, SYS_lseek);
 }	/* _lseek () */
diff --git a/libgloss/epiphany/stat.c b/libgloss/epiphany/stat.c
index 988f28dba..f9a3872a8 100644
--- a/libgloss/epiphany/stat.c
+++ b/libgloss/epiphany/stat.c
@@ -31,6 +31,7 @@
 
 #include <sys/stat.h>
 #include <syscall.h>
+#include "epiphany-syscalls.h"
 
 
 /* ------------------------------------------------------------------------- */
diff --git a/libgloss/epiphany/unlink.c b/libgloss/epiphany/unlink.c
index c78af284d..653f24b95 100644
--- a/libgloss/epiphany/unlink.c
+++ b/libgloss/epiphany/unlink.c
@@ -31,6 +31,7 @@
 
 #include <unistd.h>
 #include <syscall.h>
+#include "epiphany-syscalls.h"
 
 
 /* ------------------------------------------------------------------------- */