[PATCH] nvptx: Provide stub 'getpid', 'kill', 'stat'

... as implemented for GCN in 'newlib/libc/sys/amdgcn/*' files, but (for now)
still adding to the catch-all 'newlib/libc/machine/nvptx/misc.c' file.

This is necessary for the GCC/Fortran I/O system, for example.

Co-authored-by: Andrew Stubbs <[email protected]>
---
 newlib/libc/machine/nvptx/misc.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/newlib/libc/machine/nvptx/misc.c b/newlib/libc/machine/nvptx/misc.c
index 897ddc807..56e66b9f3 100644
--- a/newlib/libc/machine/nvptx/misc.c
+++ b/newlib/libc/machine/nvptx/misc.c
@@ -36,11 +36,22 @@ gettimeofday (struct timeval *tv, void *tz) {
   return -1;
 }

+int
+getpid (void) {
+  return 0;
+}
+
 int
 isatty (int fd) {
   return fd == 1;
 }

+int
+kill (int pid, int sig) {
+  errno = ESRCH;
+  return -1;
+}
+
 off_t
 lseek(int fd, off_t offset, int whence) {
   return 0;
@@ -56,6 +67,12 @@ read(int fd, void *buf, size_t count) {
   return 0;
 }

+int
+stat (const char *file, struct stat *pstat) {
+  errno = EACCES;
+  return -1;
+}
+
 void
 sync (void) {
 }
--
2.25.1

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