[glibc] Documentation for OpenRISC port

[Stafford Horne <shorne@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=c1fc366ec9e78e17ad3e2ecdb4c4cc662decc32b

commit c1fc366ec9e78e17ad3e2ecdb4c4cc662decc32b
Author: Stafford Horne <shorne@gmail.com>
Date:   Wed Oct 20 06:55:18 2021 +0900

    Documentation for OpenRISC port
    
    OpenRISC architecture specification:
    
     https://raw.githubusercontent.com/openrisc/doc/master/openrisc-arch-1.3-rev1.pdf
    
    Currently the port as of the 2022-01-03 rebasing there are no known
    architecture specific test failures.
    
    Writing credits for the port are:
    
     Stafford Horne  <shorne@gmail.com>
     Christian Svensson  <blue@cmd.nu>
    
    Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>

Diff:
---
 NEWS   | 9 +++++++++
 README | 1 +
 2 files changed, 10 insertions(+)

diff --git a/NEWS b/NEWS
index 9da2a740ec..1b7a64d654 100644
--- a/NEWS
+++ b/NEWS
@@ -106,6 +106,15 @@ Major new features:
   can use it to efficiently locate unwinding information for a code
   address.
 
+* Support for OpenRISC running on Linux has been added.  This port requires
+  as least binutils 2.35, GCC 11, and Linux 5.4.  Currently only soft-float
+  ABI is supported:
+
+    - or1k-linux-gnu
+
+  The OpenRISC ABI is 32-bit big-endian and uses 64-bit time (y2038 safe) and
+  64-bit file offsets (LFS default).
+
 Deprecated and removed features, and other changes affecting compatibility:
 
 * On x86-64, the LD_PREFER_MAP_32BIT_EXEC environment variable support
diff --git a/README b/README
index d0f0edb393..3d5a78ccff 100644
--- a/README
+++ b/README
@@ -35,6 +35,7 @@ The GNU C Library supports these configurations for using Linux kernels:
 	microblaze*-*-linux-gnu
 	mips-*-linux-gnu
 	mips64-*-linux-gnu
+	or1k-*-linux-gnu
 	powerpc-*-linux-gnu	Hardware or software floating point, BE only.
 	powerpc64*-*-linux-gnu	Big-endian and little-endian.
 	s390-*-linux-gnu