From e1985f9097f37748efdc29239eb3fb6a00b12f27 Mon Sep 17 00:00:00 2001
From: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Date: Sat, 23 May 2020 19:07:40 +0200
Subject: [PATCH] Makefile: fix build of io_uring on sh4

SuperH compile currently fails with:

/usr/lfs/hdd_v1/rc-buildroot-test/scripts/instance-0/output-1/host/opt/ext-toolchain/bin/../lib/gcc/sh4-buildroot-linux-uclibc/8.3.0/../../../../sh4-buildroot-linux-uclibc/bin/ld: t/io_uring.o: in function `submitter_fn':
/usr/lfs/hdd_v1/rc-buildroot-test/scripts/instance-0/output-1/build/fio-3.19/t/io_uring.c:131: undefined reference to `arch_flags'
/usr/lfs/hdd_v1/rc-buildroot-test/scripts/instance-0/output-1/host/opt/ext-toolchain/bin/../lib/gcc/sh4-buildroot-linux-uclibc/8.3.0/../../../../sh4-buildroot-linux-uclibc/bin/ld: /usr/lfs/hdd_v1/rc-buildroot-test/scripts/instance-0/output-1/build/fio-3.19/t/io_uring.c:367: undefined reference to `arch_flags'
collect2: error: ld returned 1 exit status

Fix that by ensuring we have a stub arch.o with the necessary arch flags

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
[Retrieved from:
https://github.com/axboe/fio/commit/e1985f9097f37748efdc29239eb3fb6a00b12f27]
---
 Makefile | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Makefile b/Makefile
index f1e984f5f..e39621954 100644
--- a/Makefile
+++ b/Makefile
@@ -283,6 +283,7 @@ T_PIPE_ASYNC_OBJS = t/read-to-pipe-async.o
 T_PIPE_ASYNC_PROGS = t/read-to-pipe-async
 
 T_IOU_RING_OBJS = t/io_uring.o
+T_IOU_RING_OBJS += t/arch.o
 T_IOU_RING_PROGS = t/io_uring
 
 T_MEMLOCK_OBJS = t/memlock.o