linux-kernel - [PATCH] usbip: tools: fix build error for multiple definition

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Message-Id: <20200618000844.1048309-1-borneo.antonio@gmail.com>
Date:   Thu, 18 Jun 2020 02:08:44 +0200
From:   Antonio Borneo <borneo.antonio@...il.com>
To:     Valentina Manea <valentina.manea.m@...il.com>,
        Shuah Khan <shuah@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Hewenliang <hewenliang4@...wei.com>, linux-usb@...r.kernel.org
Cc:     Antonio Borneo <borneo.antonio@...il.com>,
        linux-kernel@...r.kernel.org
Subject: [PATCH] usbip: tools: fix build error for multiple definition

With GCC 10, building usbip triggers error for multiple definition
of 'udev_context', in:
- libsrc/vhci_driver.c:18 and
- libsrc/usbip_host_common.c:27.

Declare as extern the definition in libsrc/usbip_host_common.c.

Signed-off-by: Antonio Borneo <borneo.antonio@...il.com>
---
 tools/usb/usbip/libsrc/usbip_host_common.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/usb/usbip/libsrc/usbip_host_common.c b/tools/usb/usbip/libsrc/usbip_host_common.c
index d1d8ba2a4a40..ca78aa368476 100644
--- a/tools/usb/usbip/libsrc/usbip_host_common.c
+++ b/tools/usb/usbip/libsrc/usbip_host_common.c
@@ -23,7 +23,7 @@
 #include "list.h"
 #include "sysfs_utils.h"
 
-struct udev *udev_context;
+extern struct udev *udev_context;
 
 static int32_t read_attr_usbip_status(struct usbip_usb_device *udev)
 {
-- 
2.27.0