Fix include/errno.h to not use kernel header, and instead use bits/errno.h.

This required we use _LIBC instead of __LIBC__ to be consistent with glibc.
This had some sideffects in sys/syscalls.h.  While fixing things, I made
everything use __set_errno() for (eventual) thread support.
 -Erik

1 files changed, 60 insertions, 0 deletions

diff --git a/libc/sysdeps/linux/arm/bits/errno.h b/libc/sysdeps/linux/arm/bits/errno.h
new file mode 100644
index 000000000..6bfd44e0c
--- /dev/null
+++ b/libc/sysdeps/linux/arm/bits/errno.h
@@ -0,0 +1,60 @@
+/* Error constants.  Linux specific version.
+   Copyright (C) 1996, 1997, 1998, 1999 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#ifdef _ERRNO_H
+
+# undef EDOM
+# undef EILSEQ
+# undef ERANGE
+# include <linux/errno.h>
+
+/* Linux has no ENOTSUP error code.  */
+# define ENOTSUP EOPNOTSUPP
+
+/* Linux also has no ECANCELED error code.  Since it is not used here
+   we define it to an invalid value.  */
+# define ECANCELED	125
+
+# ifndef __ASSEMBLER__
+/* We now need a declaration of the `errno' variable.  */
+extern int errno;
+
+/* Function to get address of global `errno' variable.  */
+extern int *__errno_location (void) __THROW __attribute__ ((__const__));
+
+#  if defined _LIBC
+/* We wouldn't need a special macro anymore but it is history.  */
+#   define __set_errno(val) (*__errno_location ()) = (val)
+#  endif /* _LIBC */
+
+#  if !defined _LIBC || defined _LIBC_REENTRANT
+/* When using threads, errno is a per-thread value.  */
+#   define errno (*__errno_location ())
+#  endif
+# endif /* !__ASSEMBLER__ */
+#endif /* _ERRNO_H */
+
+#if !defined _ERRNO_H && defined __need_Emath
+/* This is ugly but the kernel header is not clean enough.  We must
+   define only the values EDOM, EILSEQ and ERANGE in case __need_Emath is
+   defined.  */
+# define EDOM	33	/* Math argument out of domain of function.  */
+# define EILSEQ	84	/* Illegal byte sequence.  */
+# define ERANGE	34	/* Math result not representable.  */
+#endif /* !_ERRNO_H && __need_Emath */