Backport compilation fix for 5.3 kernel

Signed-off-by: David Abdurachmanov <david.abdurachmanov@sifive.com>

a6aaabd036d735a1b412f441bf6c706832655598.patch

@@ -0,0 +1,47 @@
+From a6aaabd036d735a1b412f441bf6c706832655598 Mon Sep 17 00:00:00 2001
+From: Joseph Myers <joseph@codesourcery.com>
+Date: Wed, 18 Sep 2019 13:22:24 +0000
+Subject: [PATCH] Fix RISC-V vfork build with Linux 5.3 kernel headers.
+
+Building glibc for RISC-V with Linux 5.3 kernel headers fails because
+<linux/sched.h>, included in vfork.S for CLONE_* constants, contains a
+structure definition not safe for inclusion in assembly code.
+
+All other architectures already avoid use of that header in vfork.S,
+either defining the CLONE_* constants locally or embedding the
+required values directly in the relevant instruction, where they
+implement vfork using the clone syscall (see the implementations for
+aarch64, ia64, mips and nios2).  This patch makes the RISC-V version
+define the constants locally like the other architectures.
+
+Tested build for all three RISC-V configurations in
+build-many-glibcs.py with Linux 5.3 headers.
+
+	* sysdeps/unix/sysv/linux/riscv/vfork.S: Do not include
+	<linux/sched.h>.
+	(CLONE_VM): New macro.
+	(CLONE_VFORK): Likewise.
+
+(cherry picked from commit 8cacbcf4a984ccac24efedb795d9c8a7f149d17b)
+---
+ sysdeps/unix/sysv/linux/riscv/vfork.S | 5 ++++-
+ 2 files changed, 11 insertions(+), 1 deletion(-)
+
+diff --git a/sysdeps/unix/sysv/linux/riscv/vfork.S b/sysdeps/unix/sysv/linux/riscv/vfork.S
+index 67373f181b..dc173d6b47 100644
+--- a/sysdeps/unix/sysv/linux/riscv/vfork.S
++++ b/sysdeps/unix/sysv/linux/riscv/vfork.S
+@@ -21,9 +21,12 @@
+ #include <sys/asm.h>
+ #include <sysdep.h>
+ #define __ASSEMBLY__
+-#include <linux/sched.h>
+ #include <asm/signal.h>
+ 
++#define CLONE_VM      0x00000100 /* Set if VM shared between processes.  */
++#define CLONE_VFORK   0x00004000 /* Set if the parent wants the child to
++				    wake it up on mm_release.  */
++
+ 	.text
+ LEAF (__libc_vfork)
+ 

glibc.spec

@@ -87,7 +87,7 @@
 Summary: The GNU libc libraries
 Name: glibc
 Version: %{glibcversion}
-Release: 1%{?dist}
+Release: 1.0.riscv64%{?dist}
 
 # In general, GPLv2+ is used by programs, LGPLv2+ is used for
 # libraries.
@@ -160,6 +160,9 @@ Patch28: glibc-rh1615608.patch
 # https://www.sourceware.org/ml/libc-alpha/2019-03/msg00436.html
 Patch31: glibc-fedora-nscd-warnings.patch
 
+# Fix compilation error on RISC-V with 5.3 kernel
+# https://github.com/bminor/glibc/commit/a6aaabd036d735a1b412f441bf6c706832655598
+Patch100: a6aaabd036d735a1b412f441bf6c706832655598.patch
 
 ##############################################################################
 # Continued list of core "glibc" package information: